Diademodon tetragonus

Mojcaj · CC BY-SA 3.0 · via Wikidata/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
- DiademodonPBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Amniota
Time the record covers
At least 4.4 million years on record.
The record covers at least 241.464 Mya to 237 Mya. No occurrence read is dated outside 247 Mya to 233.6 Mya.
7 occurrences of Diademodon tetragonus on record, most of them in the Middle 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
7 occurrencesThese 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
4 formations
- Burgersdorp Formation · Beaufort Group3
- Rio Seco de la Quebrada Formation · Puesto Viejo Group1
- Ntawere Formation1
- Omingonde Formation · Karoo Group1
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The named rock units Diademodon tetragonus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Diademodon tetragonus and its relatives
Middle TriassicWhere Diademodon tetragonus and its relatives were recorded in the Middle Triassic.
Found in the same rock
9 taxa- Cynognathus crateronotus2 sites
- Kannemeyeria simocephala2 sites
- Acratophorus argentinensis1 site
- Bauria cynops1 site
- Dolichuranus latirostris1 site
- Kannemeyeria lophorhinus1 site
- Microgomphodon oligocynus1 site
- Pascualgnathus polanskii1 site
- Temnospondyli1 site
The Paleobiology Database records 5 sites for Diademodon tetragonus, 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
5 references- The distribution of the Karroo vertebrate fauna3
- Diademodon tetragonus Seeley, 1894 (Therapsida: Cynodontia) in the Triassic of South America and its biostratigraphic implications1
- A giant skull of the temnospondyl Xenotosuchus africanus from the Middle Triassic of South Africa and its ontogenetic implications1
- A new Triassic vertebrate fauna from South West Africa1
- Two cynodonts from the Ntaware Formation in the Luangwa Valley of northern Rhodesia1
Each of the 7 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. 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 Diademodon tetragonus
- Source
- Wikidata/Commons
- Credit
- Mojcaj
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Diademodon tetragonus was found in Sketchfab.
Smithsonian Open Access and MorphoSource were 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 itDiademodon through timeFormations of the Middle TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Seeley 1894