diff --git a/plugins/gtf/src/GtfAdapter/GtfAdapter.test.ts b/plugins/gtf/src/GtfAdapter/GtfAdapter.test.ts
index f687cabfcd..1454ab808e 100644
--- a/plugins/gtf/src/GtfAdapter/GtfAdapter.test.ts
+++ b/plugins/gtf/src/GtfAdapter/GtfAdapter.test.ts
@@ -20,12 +20,13 @@ describe('adapter can fetch features from volvox.sorted.gtf', () => {
       refName: 'ctgA',
       start: 0,
       end: 100000,
+      assemblyName: 'volvox',
     })
     expect(await adapter.hasDataForRefName('ctgA')).toBe(true)
     expect(await adapter.hasDataForRefName('ctgB')).toBe(false)
     const featuresArray = await firstValueFrom(features.pipe(toArray()))
     // There are only 4 features in ctgB
-    expect(featuresArray.length).toBe(6)
+    expect(featuresArray.length).toBe(4)
     const featuresJsonArray = featuresArray.map(f => f.toJSON())
     expect(featuresJsonArray).toMatchSnapshot()
   })
@@ -47,6 +48,7 @@ test('can instantiate new GtfAdapter and check for demo data', async () => {
     refName: 'GeneScaffold_1',
     start: 0,
     end: 1100000,
+    assemblyName: 'volvox',
   })
   const featuresArray = await firstValueFrom(features.pipe(toArray()))
   const featuresJsonArray = featuresArray.map(f => f.toJSON())
diff --git a/plugins/gtf/src/GtfAdapter/GtfAdapter.ts b/plugins/gtf/src/GtfAdapter/GtfAdapter.ts
index 137418960f..bdb34f62db 100644
--- a/plugins/gtf/src/GtfAdapter/GtfAdapter.ts
+++ b/plugins/gtf/src/GtfAdapter/GtfAdapter.ts
@@ -197,7 +197,7 @@ export default class GtfAdapter extends BaseFeatureDataAdapter {
         } else {
           observer.next(
             new SimpleFeature({
-              id: `${this.id}-${feat.uniqueId}`,
+              id: feat.uniqueId,
               data: feat,
             }),
           )
@@ -211,7 +211,7 @@ export default class GtfAdapter extends BaseFeatureDataAdapter {
           const { uniqueId, strand } = subfeatures[0]!
           observer.next(
             new SimpleFeature({
-              id: `${this.id}-${uniqueId}-parent`,
+              id: `${uniqueId}-parent`,
               data: {
                 type: 'gene',
                 subfeatures,
diff --git a/plugins/gtf/src/GtfAdapter/__snapshots__/GtfAdapter.test.ts.snap b/plugins/gtf/src/GtfAdapter/__snapshots__/GtfAdapter.test.ts.snap
index e55e0af386..57ab84612b 100644
--- a/plugins/gtf/src/GtfAdapter/__snapshots__/GtfAdapter.test.ts.snap
+++ b/plugins/gtf/src/GtfAdapter/__snapshots__/GtfAdapter.test.ts.snap
@@ -2,753 +2,6 @@
 
 exports[`adapter can fetch features from volvox.sorted.gtf test getfeatures on gtf plain text adapter 1`] = `
 [
-  {
-    "_linehash": undefined,
-    "attributes": undefined,
-    "child_features": undefined,
-    "data": undefined,
-    "derived_features": undefined,
-    "end": 9000,
-    "featureType": undefined,
-    "frame": undefined,
-    "gene_id": "EDEN",
-    "gene_name": "EDEN",
-    "name": "EDEN.1",
-    "phase": 0,
-    "refName": "ctgA",
-    "score": undefined,
-    "seq_name": undefined,
-    "source": "example",
-    "start": 1049,
-    "strand": 1,
-    "subfeatures": [
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1049,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "exon",
-        "uniqueId": "test-ctgA-0-0",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1200,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1049,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "five_prime_UTR",
-        "uniqueId": "test-ctgA-0-1",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1200,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-0-2",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 3902,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 2999,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-0-3",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 3902,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 2999,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "exon",
-        "uniqueId": "test-ctgA-0-4",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 5500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 4999,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-0-5",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 5500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 4999,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "exon",
-        "uniqueId": "test-ctgA-0-6",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 7608,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 6999,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-0-7",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 9000,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 6999,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "exon",
-        "uniqueId": "test-ctgA-0-8",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 9000,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.1",
-        "parentId": "test-ctgA-0",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 7608,
-        "strand": 1,
-        "transcript_id": "EDEN.1",
-        "type": "three_prime_UTR",
-        "uniqueId": "test-ctgA-0-9",
-      },
-    ],
-    "transcript_id": "EDEN.1",
-    "type": "transcript",
-    "uniqueId": "test-ctgA-0",
-  },
-  {
-    "_linehash": undefined,
-    "attributes": undefined,
-    "child_features": undefined,
-    "data": undefined,
-    "derived_features": undefined,
-    "end": 9000,
-    "featureType": undefined,
-    "frame": undefined,
-    "gene_id": "EDEN",
-    "gene_name": "EDEN",
-    "name": "EDEN.2",
-    "phase": 0,
-    "refName": "ctgA",
-    "score": undefined,
-    "seq_name": undefined,
-    "source": "example",
-    "start": 1049,
-    "strand": 1,
-    "subfeatures": [
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1049,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "exon",
-        "uniqueId": "test-ctgA-1-0",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1200,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1049,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "five_prime_UTR",
-        "uniqueId": "test-ctgA-1-1",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1200,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-1-2",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 5500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 4999,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-1-3",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 5500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 4999,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "exon",
-        "uniqueId": "test-ctgA-1-4",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 7608,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 6999,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-1-5",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 9000,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 6999,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "exon",
-        "uniqueId": "test-ctgA-1-6",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 9000,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.2",
-        "parentId": "test-ctgA-1",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 7608,
-        "strand": 1,
-        "transcript_id": "EDEN.2",
-        "type": "three_prime_UTR",
-        "uniqueId": "test-ctgA-1-7",
-      },
-    ],
-    "transcript_id": "EDEN.2",
-    "type": "transcript",
-    "uniqueId": "test-ctgA-1",
-  },
-  {
-    "_linehash": undefined,
-    "attributes": undefined,
-    "child_features": undefined,
-    "data": undefined,
-    "derived_features": undefined,
-    "end": 9000,
-    "featureType": undefined,
-    "frame": undefined,
-    "gene_id": "EDEN",
-    "gene_name": "EDEN",
-    "name": "EDEN.3",
-    "phase": 0,
-    "refName": "ctgA",
-    "score": undefined,
-    "seq_name": undefined,
-    "source": "example",
-    "start": 1299,
-    "strand": 1,
-    "subfeatures": [
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1299,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "exon",
-        "uniqueId": "test-ctgA-2-0",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 1500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 1,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 1299,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "five_prime_UTR",
-        "uniqueId": "test-ctgA-2-1",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 3902,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 2999,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "exon",
-        "uniqueId": "test-ctgA-2-2",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 3300,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 1,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 2999,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "five_prime_UTR",
-        "uniqueId": "test-ctgA-2-3",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 3902,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 3300,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-2-4",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 5500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 1,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 4999,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-2-5",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 5500,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 4999,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "exon",
-        "uniqueId": "test-ctgA-2-6",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 7600,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 1,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 6999,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "CDS",
-        "uniqueId": "test-ctgA-2-7",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 9000,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 0,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 6999,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "exon",
-        "uniqueId": "test-ctgA-2-8",
-      },
-      {
-        "_linehash": undefined,
-        "attributes": undefined,
-        "child_features": undefined,
-        "data": undefined,
-        "derived_features": undefined,
-        "end": 9000,
-        "featureType": undefined,
-        "frame": undefined,
-        "gene_id": "EDEN",
-        "gene_name": "EDEN",
-        "name": "EDEN.3",
-        "parentId": "test-ctgA-2",
-        "phase": 1,
-        "refName": "ctgA",
-        "score": undefined,
-        "seq_name": undefined,
-        "source": "example",
-        "start": 7600,
-        "strand": 1,
-        "transcript_id": "EDEN.3",
-        "type": "three_prime_UTR",
-        "uniqueId": "test-ctgA-2-9",
-      },
-    ],
-    "transcript_id": "EDEN.3",
-    "type": "transcript",
-    "uniqueId": "test-ctgA-2",
-  },
   {
     "_linehash": undefined,
     "attributes": undefined,
@@ -1082,6 +335,767 @@ exports[`adapter can fetch features from volvox.sorted.gtf test getfeatures on g
     "type": "transcript",
     "uniqueId": "test-ctgA-5",
   },
+  {
+    "end": 9000,
+    "name": "EDEN",
+    "refName": "ctgA",
+    "start": 1049,
+    "strand": 1,
+    "subfeatures": [
+      {
+        "_linehash": undefined,
+        "attributes": undefined,
+        "child_features": undefined,
+        "data": undefined,
+        "derived_features": undefined,
+        "end": 9000,
+        "featureType": undefined,
+        "frame": undefined,
+        "gene_id": "EDEN",
+        "gene_name": "EDEN",
+        "name": "EDEN.1",
+        "parentId": "test-ctgA-0-parent",
+        "phase": 0,
+        "refName": "ctgA",
+        "score": undefined,
+        "seq_name": undefined,
+        "source": "example",
+        "start": 1049,
+        "strand": 1,
+        "subfeatures": [
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1049,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "exon",
+            "uniqueId": "test-ctgA-0-0",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1200,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1049,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "five_prime_UTR",
+            "uniqueId": "test-ctgA-0-1",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1200,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-0-2",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 3902,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 2999,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-0-3",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 3902,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 2999,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "exon",
+            "uniqueId": "test-ctgA-0-4",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 5500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 4999,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-0-5",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 5500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 4999,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "exon",
+            "uniqueId": "test-ctgA-0-6",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 7608,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 6999,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-0-7",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 9000,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 6999,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "exon",
+            "uniqueId": "test-ctgA-0-8",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 9000,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.1",
+            "parentId": "test-ctgA-0",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 7608,
+            "strand": 1,
+            "transcript_id": "EDEN.1",
+            "type": "three_prime_UTR",
+            "uniqueId": "test-ctgA-0-9",
+          },
+        ],
+        "transcript_id": "EDEN.1",
+        "type": "transcript",
+        "uniqueId": "test-ctgA-0",
+      },
+      {
+        "_linehash": undefined,
+        "attributes": undefined,
+        "child_features": undefined,
+        "data": undefined,
+        "derived_features": undefined,
+        "end": 9000,
+        "featureType": undefined,
+        "frame": undefined,
+        "gene_id": "EDEN",
+        "gene_name": "EDEN",
+        "name": "EDEN.2",
+        "parentId": "test-ctgA-0-parent",
+        "phase": 0,
+        "refName": "ctgA",
+        "score": undefined,
+        "seq_name": undefined,
+        "source": "example",
+        "start": 1049,
+        "strand": 1,
+        "subfeatures": [
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1049,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "exon",
+            "uniqueId": "test-ctgA-1-0",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1200,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1049,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "five_prime_UTR",
+            "uniqueId": "test-ctgA-1-1",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1200,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-1-2",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 5500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 4999,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-1-3",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 5500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 4999,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "exon",
+            "uniqueId": "test-ctgA-1-4",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 7608,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 6999,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-1-5",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 9000,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 6999,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "exon",
+            "uniqueId": "test-ctgA-1-6",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 9000,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.2",
+            "parentId": "test-ctgA-1",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 7608,
+            "strand": 1,
+            "transcript_id": "EDEN.2",
+            "type": "three_prime_UTR",
+            "uniqueId": "test-ctgA-1-7",
+          },
+        ],
+        "transcript_id": "EDEN.2",
+        "type": "transcript",
+        "uniqueId": "test-ctgA-1",
+      },
+      {
+        "_linehash": undefined,
+        "attributes": undefined,
+        "child_features": undefined,
+        "data": undefined,
+        "derived_features": undefined,
+        "end": 9000,
+        "featureType": undefined,
+        "frame": undefined,
+        "gene_id": "EDEN",
+        "gene_name": "EDEN",
+        "name": "EDEN.3",
+        "parentId": "test-ctgA-0-parent",
+        "phase": 0,
+        "refName": "ctgA",
+        "score": undefined,
+        "seq_name": undefined,
+        "source": "example",
+        "start": 1299,
+        "strand": 1,
+        "subfeatures": [
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1299,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "exon",
+            "uniqueId": "test-ctgA-2-0",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 1500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 1,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 1299,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "five_prime_UTR",
+            "uniqueId": "test-ctgA-2-1",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 3902,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 2999,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "exon",
+            "uniqueId": "test-ctgA-2-2",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 3300,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 1,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 2999,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "five_prime_UTR",
+            "uniqueId": "test-ctgA-2-3",
+          },
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+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 3902,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 3300,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-2-4",
+          },
+          {
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+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 5500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 1,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 4999,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-2-5",
+          },
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+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 5500,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 4999,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "exon",
+            "uniqueId": "test-ctgA-2-6",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 7600,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 1,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 6999,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "CDS",
+            "uniqueId": "test-ctgA-2-7",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 9000,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 0,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 6999,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "exon",
+            "uniqueId": "test-ctgA-2-8",
+          },
+          {
+            "_linehash": undefined,
+            "attributes": undefined,
+            "child_features": undefined,
+            "data": undefined,
+            "derived_features": undefined,
+            "end": 9000,
+            "featureType": undefined,
+            "frame": undefined,
+            "gene_id": "EDEN",
+            "gene_name": "EDEN",
+            "name": "EDEN.3",
+            "parentId": "test-ctgA-2",
+            "phase": 1,
+            "refName": "ctgA",
+            "score": undefined,
+            "seq_name": undefined,
+            "source": "example",
+            "start": 7600,
+            "strand": 1,
+            "transcript_id": "EDEN.3",
+            "type": "three_prime_UTR",
+            "uniqueId": "test-ctgA-2-9",
+          },
+        ],
+        "transcript_id": "EDEN.3",
+        "type": "transcript",
+        "uniqueId": "test-ctgA-2",
+      },
+    ],
+    "type": "gene",
+    "uniqueId": "test-ctgA-0-parent",
+  },
 ]
 `;