Traversodontidae
Traversodontidae is an extinct family of herbivorous cynodonts. Traversodonts were primarily Gondwanan, with many species known from Africa and South America. Recently, traversodonts have also been found from Europe and North America. Traversodonts first appeared in the Middle Triassic and diversified in the Late Triassic before going extinct at the end of the epoch. The family Traversodontidae was erected by Friedrich von Huene in 1936 for cynodonts first found in São Pedro do Sul in Paleorrota, Brazil.

Marcio L. Castro · CC BY-SA 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
- GomphodontiaPBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Amniota
Time the record covers
At least 41 million years on record.
The record covers at least 247 Mya to 205.7 Mya. No occurrence read is dated outside 250.8 Mya to 72.2 Mya.
88 occurrences of Traversodontidae 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
88 occurrences- Early Triassic1%
- Middle Triassic47%
- Late Triassic51%
- Early Jurassicunder 1%
- Middle Jurassicunder 1%
- Late Jurassicunder 1%
- Early Cretaceousunder 1%
- Late Cretaceousunder 1%
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
25 formations
- Santa Maria Formation · Rosário do Sul Group27
- Chañares Formation · Agua de la Peña Group7
- Isalo II Formation · Isalo Group7
- Manda Beds Formation7
- Ischigualasto Formation4
- Grès à Avicula contorta Formation4
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The named rock units Traversodontidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. One further formation holds fewer occurrences and is not listed. 5 occurrences have no formation on record, which is common for older literature.
Traversodontidae and its relatives
Late TriassicWhere Traversodontidae and its relatives were recorded in the Late Triassic.
Found in the same rock
253 taxa- Massetognathus pascuali6 sites
- Rhynchosauria5 sites
- Cynodontia4 sites
- Exaeretodon4 sites
- Menadon besairiei4 sites
- Protuberum cabralensis4 sites
- Archosauria3 sites
- Archosauriformes3 sites
- Chiniquodon3 sites
- Chiniquodon theotonicus3 sites
- Dicynodontia3 sites
- Dinodontosaurus3 sites
- Dinodontosaurus tener3 sites
- Exaeretodon riograndensis3 sites
- Kannemeyeriiformes3 sites
- Massetognathus ochagaviae3 sites
- Pycnodontiformes3 sites
- Scalenodontoides macrodontes3 sites
- Siriusgnathus niemeyerorum3 sites
- Temnospondyli3 sites
- Traversodon stahleckeri3 sites
- Andescynodon mendozensis2 sites
- Arctotraversodon plemmyridon2 sites
- Clevosaurus2 sites
The Paleobiology Database records 71 sites for Traversodontidae, 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
62 references- Lieferung 2. Cynodontia [Part 2. Cynodontia]6
- Late Triassic cynodonts from Saint-Nicolas-de-Port (north-eastern France)4
- A Middle Triassic cynodont fauna from Namibia and its implications for the biogeography of Gondwana3
- A new traversodontid cynodont (Therapsida, Eucynodontia) from the Middle Triassic Santa Maria Formation of Rio Grande do Sul, Brazil3
- Catalogue of non-mammalian cynodonts in the Vertebrate Paleontology Collection of the Instituto Miguel Lillo, Universidad Nacional de Tucuman, with comments on species3
- Postcanine occlusion in cynodonts and tritylodontids3
- Craniodental reinterpretations and new specimens of Protuberum cabralense, a bizarre traversodontid cynodont from the earliest Late Triassic of Brazil2
- Africa’s oldest dinosaurs reveal early suppression of dinosaur distribution2
- Siriusgnathus niemeyerorum (Eucynodontia: Gomphodontia): the youngest South American traversodontid?2
- Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina2
- New material of Menadon besairiei (Cynodontia: Traversodontidae) from the Triassic of Madagascar2
- New traversodontids (Synapsida, Eucynodontia) from the Triassic of Madagascar2
Each of the 88 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. 50 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 Traversodontidae
- Source
- Wikipedia/Commons
- Credit
- Marcio L. Castro
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Traversodontidae 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.
The description on this site
- 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 itGomphodontia through timeFormations of the Late TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Huene 1936