Crocodyliformes
Crocodyliformes is a clade of crurotarsan archosaurs, the group often traditionally referred to as "crocodilians". They are the first members of Crocodylomorpha to possess many of the features that define later relatives. They are the only pseudosuchians to survive the Cretaceous–Paleogene extinction event.

LiterallyMiguel · 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
- SolidocraniaPBDB
- Diet
- carnivorePBDB, for Pseudosuchia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Diapsida
Time the record covers
At least 227 million years on record.
The record covers at least 227.3 Mya to 11.7 ka. No occurrence read is dated outside 237 Mya to 0 Mya.
4,940 occurrences of Crocodyliformes on record, most of them in the Late Cretaceous. The Paleobiology Database records this as a living group. 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
4,940 occurrences- Late Triassicunder 1%
- Early Jurassicunder 1%
- Middle Jurassic2%
- Late Jurassic5%
- Early Cretaceous11%
- Late Cretaceous29%
- Paleocene7%
- Eocene13%
- Oligocene3%
- Miocene17%
- Pliocene3%
- Pleistocene8%
- Holocene2%
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
839 formations
- Hell Creek Formation · Montana Group199
- Willwood Formation169
- Solimões Formation100
- Morrison Formation95
- Koobi Fora Formation · Omo Group79
- Urumaco Formation70
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The named rock units Crocodyliformes has been recovered from, largest first. Drawn where the rock is now, not where it formed. 815 further formations hold fewer occurrences each and are not listed. 864 occurrences have no formation on record, which is common for older literature.
Crocodyliformes and its relatives
Late CretaceousWhere Crocodyliformes and its relatives were recorded in the Late Cretaceous.
Found in the same rock
2,908 taxa- Crocodylus66 sites
- Crocodylia56 sites
- Equus38 sites
- Trionychidae36 sites
- Clarias35 sites
- Bovidae34 sites
- Alcelaphini33 sites
- Geochelone33 sites
- Trionyx33 sites
- Lepisosteus31 sites
- Osteichthyes31 sites
- Crocodylus niloticus30 sites
- Hipparion28 sites
- Euthecodon brumpti26 sites
- Aves25 sites
- Palaeoloxodon recki24 sites
- Reptilia24 sites
- Gazella22 sites
- Kobus22 sites
- Mammalia22 sites
- Suidae22 sites
- Testudines22 sites
- Theropithecus oswaldi22 sites
- Theropoda22 sites
The Paleobiology Database records at least 1,479 sites for Crocodyliformes, and this reads 240 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
1,917 references- Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary148
- Review of the Late Cretaceous-early Paleogene crocodylomorphs of Europe: Extinction patterns across the K-PG boundary91
- Georeferencing fossiliferous localities from Solimões and Acre Basins (Brazil) -what we know so far about Solimões Formation and future perspectives87
- Fossil Vertebrate Collections72
- Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota68
- Synonymies and reidentifications of North American fossil vertebrates and so forth58
- Fossil crocodilians from Colombia and the Cenozoic history of the Crocodilia in South America52
- Exceptional continental record of biotic recovery after the Cretaceous–Paleogene mass extinction47
- Vertebrate faunal changes through Lancian and Puercan time in southern Wyoming41
- A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru39
- Evolutionary relationships and systematics of Atoposauridae (Crocodylomorpha: Neosuchia): implications for the rise of Eusuchia33
- Italian Cenozoic crocodilians: taxa, timing and palaeobiogeographic implications31
Each of the 4,940 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. 1,905 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 content2
Picture of Crocodyliformes
- Source
- Wikipedia/Commons
- Credit
- LiterallyMiguel
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
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 itSolidocrania through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Hay 1930)