Chroniosuchidae

Chroniosuchidae is a family of semi-aquatic tetrapods found in sediments from the upper Permian and the upper Triassic periods, most in Russia. They were generally rather large animals, with long jaws similar to those found in modern crocodiles, and probably lived a similar lifestyle as riverside piscivores and ambush predators. Like all chroniosuchians, they bore extensive osteoderm armour on their backs, possibly as protection against terrestrial predators such as the Permian therapsids and the Triassic rauisuchians.

Chroniosuchidae

Nobu Tamura ( http://spinops.blogspot.com ) · CC BY 3.0 · 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
ChroniosuchiaPBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
brackish,freshwater,terrestrialPBDB, for Tetrapoda

Time the record covers

At least 22 million years on record.

The record covers at least 264.28 Mya to 241.464 Mya. No occurrence read is dated outside 274.4 Mya to 227.3 Mya.

Permian — about 40 of 41 occurrencesPermianEarly Triassic — about 0 of 41 occurrencesMiddle Triassic — about 0 of 41 occurrencesMiddle TriassicLate Triassic — about 1 of 41 occurrencesLate Triassic275–274 Mya — about 0.1 occurrences274–272 Mya — about 0.3 occurrences272–270 Mya — about 0.3 occurrences270–269 Mya — about 0.3 occurrences269–267 Mya — about 0.3 occurrences267–266 Mya — about 1.0 occurrences266–264 Mya — about 3 occurrences264–262 Mya — about 8 occurrences262–261 Mya — about 8 occurrences261–259 Mya — about 8 occurrences259–257 Mya — about 7 occurrences257–256 Mya — about 3 occurrences256–254 Mya — about 0.6 occurrences243–241 Mya — about 0.0 occurrences241–239 Mya — about 0.1 occurrences239–238 Mya — about 0.1 occurrences238–236 Mya — about 0.1 occurrences236–235 Mya — about 0.1 occurrences235–233 Mya — about 0.1 occurrences233–231 Mya — about 0.1 occurrences231–230 Mya — about 0.1 occurrences230–228 Mya — about 0.1 occurrences228–226 Mya — about 0.0 occurrences264.28 Mya241.464 Mya275.3 Mya226.4 Mya

41 occurrences of Chroniosuchidae 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

14 formations

Poldarsa — 60.53°N, 44.91°EPoldarsa — 60.37°N, 44.08°EPoldarsa — 60.58°N, 45.43°EPoldarsa — 60.59°N, 45.53°EPoldarsa — 60.61°N, 45.62°EMalokinelskaya — 51.47°N, 55.14°EMalokinelskaya — 53.47°N, 52.14°EMalokinelskaya — 52.50°N, 53.69°EKutulukskaya — 52.78°N, 53.16°EKutulukskaya — 51.68°N, 54.22°EKutulukskaya — 53.31°N, 52.31°EQingtoushan — 39.70°N, 97.74°EKutuluk — 51.34°N, 55.76°EKutuluk — 52.07°N, 54.23°EKulchumovskaya — 51.29°N, 55.66°EKulchumovskaya — 51.66°N, 55.93°ESalarevo — 61.19°N, 46.63°EVyasovka — 51.88°N, 56.29°EMadygen — 40.07°N, 70.22°EIlyinskoe — 55.02°N, 48.83°EMalaya Kinel — 51.86°N, 56.20°ESukhona — 60.60°N, 45.40°EIsheevo — 55.78°N, 48.93°EKama Region Fifth — 55.02°N, 48.87°E

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The named rock units Chroniosuchidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 occurrences have no formation on record, which is common for older literature.

Chroniosuchidae and its relatives

Permian

Where Chroniosuchidae and its relatives were recorded in the Permian.

Found in the same rock

292 taxa

The Paleobiology Database records 34 sites for Chroniosuchidae, 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

10 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. 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 Chroniosuchidae

Credit
Nobu Tamura ( http://spinops.blogspot.com )
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan of Chroniosuchidae 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 itChroniosuchia through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Vjushkov 1957