Cornuodus
Cornuodus is an extinct genus of conodonts.

Viira, Viive · CC BY-NC 4.0 · via GBIF. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- CornuodontidaePBDB
- Diet
- carnivorePBDB, for Conodonta
- Life habit
- nektonicPBDB, for Conodonta
- Motility
- actively mobilePBDB, for Conodonta
- Vision
- well-developedPBDB, for Conodonta
Time the record covers
At least 31 million years on record.
The record covers at least 477.1 Mya to 445.2 Mya. No occurrence read is dated outside 486.85 Mya to 443.1 Mya.
102 occurrences of Cornuodus on record, most of them in the Ordovician. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
102 occurrences- Ordovician100%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
32 formations
- San Juan Formation11
- Toila Formation11
- Zalesie Formation10
- Dawan Formation8
- Volkhov Stage Formation8
- Zitai Formation7
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The named rock units Cornuodus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 8 further formations hold fewer occurrences each and are not listed. 1 occurrence has no formation on record, which is common for older literature.
Cornuodus and its relatives
OrdovicianWhere Cornuodus and its relatives were recorded in the Ordovician.
Found in the same rock
387 taxa- Baltoniodus44 sites
- Protopanderodus41 sites
- Drepanoistodus basiovalis33 sites
- Paroistodus originalis33 sites
- Periodon32 sites
- Acodus similaris31 sites
- Protopanderodus rectus27 sites
- Decoriconus26 sites
- Semiacontiodus25 sites
- Drepanoistodus forceps24 sites
- Drepanodus23 sites
- Drepanoistodus22 sites
- Scolopodus striatus21 sites
- Parapaltodus19 sites
- Amorphognathus ordovicicus17 sites
- Ansella jemtlandica17 sites
- Dapsilodus mutatus16 sites
- Microzarkodina16 sites
- Periodon macrodentatus16 sites
- Triangulodus16 sites
- Juanognathus15 sites
- Oistodus15 sites
- Scalpellodus15 sites
- Scolopodus15 sites
The Paleobiology Database records 94 sites for Cornuodus, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
26 references- Conodont biostratigraphy and global correlation of the middle Darriwilian-lower Sandbian (Ordovician) Las Aguaditas Formation, Precordillera of San Juan, Argentina13
- Biostratigraphy of the Yangtze Gorge Area. Part (2) Early Paleozoic Era12
- Conodonts and brachiopods from the Volkhov Stage (Lower Ordovician) microbial mud mound at Putilovo Quarry, north-western Russia11
- An Early to Middle Ordovician succession of conodont faunas at Mäekalda, northern Estonia11
- Sedimentation and Fossils of the Mojcza Limestone10
- Biodiversification of Early to Middle Ordovician conodonts: a case study from the Zitai Formation of Anhui Province, eastern China9
- The conodont fauna in the Middle Ordovician Eoplacognathus pseudoplanus Zone of Baltoscandia7
- Middle Ordovician (late Dapingian–Darriwilian) conodonts from the Cow Head Group and Lower Head Formation, western Newfoundland, Canada3
- New conodont faunas from the Late Ordovician of the Central Carnic Alps, Austria3
- Chrono-, litho- and conodont bio-stratigraphy of the Rauchkofel Boden Section (Upper Ordovician–Lower Devonian), Carnic Alps, Austria2
- Darriwilian (Middle Ordovician) conodonts from Thompson Creek, Nelson Province, New Zealand2
- Biostratigraphy and paleobiogeography of Middle and Late Ordovician conodonts from the Langkawi Islands, northwestern peninsular Malaysia2
Each of the 102 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 14 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1

Picture of Cornuodus
- Source
- GBIF
- Credit
- Viira, Viive
- Licence
- CC BY-NC 4.0
- Commercial use
- the licence does not allow it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Source
- Wikipedia, “Cornuodus”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itCornuodontidae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0.