Akidnognathidae

Akidnognathidae is an extinct family of therocephalian therapsids from the Late Permian and Early Triassic of South Africa, Russia and China. The family includes many large-bodied therocephalians that were carnivorous, including Moschorhinus and Olivierosuchus. One akidnognathid, Euchambersia, may even have been venomous. Akidnognathids have robust skulls with a pair of large caniniform teeth in their upper jaws. The family is morphologically intermediate between the more basal therocephalian group Scylacosauridae and the more derived group Baurioidea.

Akidnognathidae

Jun Liu​, Fernando Abdala · 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
EutherocephaliaPBDB
Diet
carnivorePBDB, for Therocephalia
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Amniota

Time the record covers

At least 2.2 million years on record.

The record covers at least 254.14 Mya to 251.902 Mya. No occurrence read is dated outside 259.857 Mya to 247 Mya.

Permian — about 23 of 41 occurrencesPermianEarly Triassic — about 18 of 41 occurrencesEarly TriassicMiddle Triassic — about 0 of 41 occurrences260–259 Mya — about 1 occurrence259–259 Mya — about 1 occurrence259–259 Mya — about 1 occurrence259–258 Mya — about 1 occurrence258–258 Mya — about 1 occurrence258–257 Mya — about 1 occurrence257–257 Mya — about 1 occurrence257–256 Mya — about 1 occurrence256–256 Mya — about 1 occurrence256–255 Mya — about 1 occurrence255–255 Mya — about 1 occurrence255–254 Mya — about 1 occurrence254–254 Mya — about 1 occurrence254–253 Mya — about 1 occurrence253–253 Mya — about 1 occurrence253–253 Mya — about 1 occurrence253–252 Mya — about 1 occurrence252–252 Mya — about 2 occurrences252–251 Mya — about 2 occurrences251–251 Mya — about 2 occurrences251–250 Mya — about 2 occurrences250–250 Mya — about 2 occurrences250–249 Mya — about 2 occurrences249–249 Mya — about 2 occurrences249–248 Mya — about 2 occurrences248–248 Mya — about 2 occurrences248–247 Mya — about 2 occurrences247–247 Mya — about 1 occurrence254.14 Mya251.902 Mya260.4 Mya246.5 Mya

41 occurrences of Akidnognathidae on record, most of them in the Permian. 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

41 occurrences

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

5 formations

Balfour — 31.96°S, 24.57°EBalfour — 31.87°S, 24.55°EBalfour — 31.95°S, 24.92°EBalfour — 33.00°S, 20.45°EBalfour — 31.72°S, 24.98°EKatberg — 30.50°S, 25.97°EKatberg — 31.84°S, 24.86°ENormandien — 28.55°S, 29.08°ENaobaogou — 40.65°N, 110.43°ENaobaogou — 40.72°N, 110.73°EFremouw — 85.22°S, 175.50°W

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The named rock units Akidnognathidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 26 occurrences have no formation on record, which is common for older literature.

Akidnognathidae and its relatives

Permian

Where Akidnognathidae and its relatives were recorded in the Permian.

Found in the same rock

52 taxa

The Paleobiology Database records 24 sites for Akidnognathidae, 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

14 references

Each of the 41 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. 2 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 Akidnognathidae

Credit
Jun Liu​, Fernando Abdala
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Akidnognathidae was found in MorphoSource and Sketchfab.

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

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 itEutherocephalia through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Nopcsa 1923