Typothorax
Typothorax is an extinct genus of typothoracine aetosaur that lived in the Late Triassic. Its remains have been found in North America. Two species are known: T. coccinarum, the type species, and T. antiquum.

★Kumiko★ · CC BY-SA 2.0 · 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
- TypothoracisinaePBDB
- Diet
- herbivorePBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Diapsida
Time the record covers
At least 5.4 million years on record.
The record covers at least 211.18 Mya to 205.7 Mya. No occurrence read is dated outside 237 Mya to 201.4 Mya.
90 occurrences of Typothorax 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
90 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
9 formations
- Chinle Formation62
- Garita Creek Formation · Chinle Group11
- Cooper Canyon Formation · Dockum Group5
- Trujillo Formation · Chinle Group4
- Santa Rosa Formation · Chinle Group2
- Petrified Forest Formation · Chinle Group2
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The named rock units Typothorax has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Typothorax and its relatives
Late TriassicWhere Typothorax and its relatives were recorded in the Late Triassic.
Found in the same rock
151 taxa- Mystriosuchini21 sites
- Mystriosuchinae17 sites
- Metoposauridae13 sites
- Arganodus12 sites
- Apachesaurus gregorii11 sites
- Machaeroprosopus buceros11 sites
- Paratypothorax10 sites
- Shuvosaurus10 sites
- Reptilia9 sites
- Stagonolepididae9 sites
- Theropoda9 sites
- Archosauria8 sites
- Postosuchus7 sites
- Archosauriformes6 sites
- Unio6 sites
- Coelophysoidea5 sites
- Phytosauria5 sites
- Postosuchus kirkpatricki5 sites
- Redfieldiidae5 sites
- Shuvosauridae5 sites
- Shuvosaurus inexpectatus5 sites
- Unionidae5 sites
- Vancleavea campi5 sites
- Anaschisma4 sites
The Paleobiology Database records 89 sites for Typothorax, 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- Late Triassic (Carnian and Norian) Tetrapods from the Southwestern United States38
- A new species of the aetosaur Typothorax (Archosauria: Stagonolepididae) from the Upper Triassic of east-central New Mexico13
- A vertebrate fauna from the Upper Triassic Owl Rock Member of the Chinle Formation in Northern Arizona, Northern Arizona University7
- Lithostratigraphy, chemostratigraphy, and vertebrate biostratigraphy of the Dockum Group (Upper Triassic), of southern Garza County, West Texas. Unpublished PhD thesis, Texas Tech University5
- Advances in Late Triassic vertebrate paleontology based on new material from Petrified Forest National Park, Arizona3
- Fossil Vertebrate Collections2
- The vertebrate fauna of the Upper Triassic (Revueltian: early-mid Norian) Painted Desert Member (Petrified Forest Formation: Chinle Group) in the Chama Basin, northern New Mexico2
- Geology and paleontology of the Chinle Formation, Petrified Forest National Park and vicinity, Arizona and a discussion of vertebrate fossils of the southwestern Upper Triassic2
- A new record of Dromomeron romeri Irmis et al., 2007 (Lagerpetidae) from the Chinle Formation of Arizona, U.S.A.1
- The vertebrate assemblage of the Late Triassic Canjilon Quarry (northern New Mexico, USA), and the importance of apomorphy-based assemblage comparisons1
- A Late Triassic dinosauromorph assemblage from New Mexico and the rise of dinosaurs1
- A critical re-evaluation of the Late Triassic dinosaur taxa of North America1
Each of the 90 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 content3
Picture of Typothorax
- Source
- Wikipedia/Commons
- Credit
- ★Kumiko★
- Licence
- CC BY-SA 2.0
- Commercial use
- the licence allows it
Laser scan
- Source
- MorphoSource
- Licence
- No Copyright (US)
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Typothorax coccinarum · pefo:42506
3D model
- Source
- Sketchfab
- Credit
- wildlifeandbones
- Licence
- CC Attribution-NonCommercial-ShareAlike
- Commercial use
- the licence does not allow it
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, “Typothorax”
- 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 itTypothoracisinae through timeFormations of the Late TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1875