Onychodus
Searched as Onychodus arcticus. The Paleobiology Database treats Onychodus as the accepted name.
Onychodus is a genus of prehistoric lobe-finned fish which lived during the Devonian Period. It is one of the best known of the group of onychodontiform fishes. Scattered fossil teeth of Onychodus were first described from Ohio in 1857 by John Strong Newberry. Other species were found in Australia, England, Norway and Germany showing that it had a widespread range.

Kate Trinajstic; Derek E. G. Briggs; John A. Long · CC BY 4.0 · via Wikipedia/Commons. 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
- OnychodontidaePBDB
- Motility
- actively mobilePBDB, for Osteichthyes
Time the record covers
At most 5.7 million years on record.
The one occurrence read is dated to somewhere between 387.95 Mya and 382.31 Mya, which is a dating window rather than a span.
1 occurrence of Onychodus on record, most of them in the Devonian. 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
1 occurrences- Devonian100%
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
1 formation
- Tordalen Formation · Mimerdalen Group1
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The named rock units Onychodus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Onychodus and its relatives
DevonianWhere Onychodus and its relatives were recorded in the Devonian.
Found in the same rock
282 taxa- Holonema7 sites
- Glyptolepis6 sites
- Osteolepididae5 sites
- Ptyctodontida4 sites
- Acanthodes3 sites
- Asterolepis3 sites
- Byssacanthus dilatatus3 sites
- Cheiracanthus brevicostatus3 sites
- Dipterus3 sites
- Ptyctodus3 sites
- Actinopterygii2 sites
- Antiarchi2 sites
- Asterolepis radiata2 sites
- Cephalaspidida2 sites
- Cheiracanthus2 sites
- Cheiracanthus latus2 sites
- Cheirolepis2 sites
- Chondrichthyes2 sites
- Diplacanthus2 sites
- Dipnoi2 sites
- Eastmanosteus2 sites
- Elasmobranchii2 sites
- Ganosteus2 sites
- Gyracanthus2 sites
The Paleobiology Database records 24 sites for Onychodus, 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
1 referenceEach of the 1 occurrence 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content3
Picture of Onychodus
- Source
- Wikipedia/Commons
- Credit
- Kate Trinajstic; Derek E. G. Briggs; John A. Long
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
CT scan
- Source
- MorphoSource
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Onychodus jandemarrai · wam:01.10.04
3D model
- Source
- Sketchfab
- Credit
- Max Christie
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Onychodus”
- 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 itOnychodontidae through timeFormations of the DevonianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Newberry 1857