Gwyneddichnium majore

Yale Peabody Museum · CC0 · 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
- GwyneddichniumPBDB
- Diet
- carnivorePBDB, for Pseudosuchia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Diapsida
Time the record covers
At most 26 million years on record.
Every occurrence read is dated to somewhere between 227.3 Mya and 201.4 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
3 occurrences of Gwyneddichnium majore on record, most of them in the Late Triassic. 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
3 occurrences- Late Triassic100%
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
3 formations
- Lockatong Formation · Chatham Group1
- Passaic Formation · Chatham Group1
- Bull Run Formation · Chatham Group1
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The named rock units Gwyneddichnium majore has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Gwyneddichnium majore and its relatives
Late TriassicWhere Gwyneddichnium majore and its relatives were recorded in the Late Triassic.
Found in the same rock
8 taxa- Anchisauripus gwyneddensis1 site
- Grallator tuberosus1 site
- Gwyneddichnium elongatum1 site
- Gwyneddichnium minore1 site
- Hypsognathus fenneri1 site
- Kintneria brunswickii1 site
- Platypterna lockatong1 site
- Procolophonichnium1 site
The Paleobiology Database records 3 sites for Gwyneddichnium majore, and this reads all of them. The number is how many of those sites it was catalogued from too.
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
3 references- Upper Triassic reptile footprints and a coelacanth fish scale from the Culpeper Basin, Virginia1
- Some Upper Triassic reptiles, footprints and an amphibian from New Jersey1
- Triassic reptilian tracks and trends of locomotive evolution1
Each of the 3 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. Each entry links to the Paleobiology Database's own record for the work.
Media and terms
Media content1

Picture of Gwyneddichnium majore
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Gwyneddichnium majore was found in Smithsonian Open Access and Sketchfab.
MorphoSource was not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itGwyneddichnium through timeFormations of the Late TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Bock 1952