Alligatoridae

= · Public Domain · via Wikidata/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
- GlobidontaPBDB
- Diet
- carnivorePBDB, for Crocodylia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- marinePBDB, for Mesoeucrocodylia
Time the record covers
At least 89 million years on record.
The record covers at least 89.8 Mya to 11.7 ka. No occurrence read is dated outside 93.9 Mya to 0 Mya.
699 occurrences of Alligatoridae on record, most of them in the Miocene. 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
699 occurrences- Late Cretaceous24%
- Paleocene7%
- Eocene20%
- Oligocene3%
- Miocene33%
- Pliocene2%
- Pleistocene8%
- Holocene3%
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
116 formations
- Willwood Formation88
- Hell Creek Formation · Montana Group71
- Urumaco Formation53
- Pebas Formation36
- Ferris Formation26
- Solimões Formation25
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The named rock units Alligatoridae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 92 further formations hold fewer occurrences each and are not listed. 101 occurrences have no formation on record, which is common for older literature.
Alligatoridae and its relatives
MioceneWhere Alligatoridae and its relatives were recorded in the Miocene.
Found in the same rock
2,440 taxa- Allognathosuchus104 sites
- Trionychidae81 sites
- Lepisosteus occidentalis72 sites
- Lepisosteus67 sites
- Myledaphus bipartitus62 sites
- Brachychampsa montana61 sites
- Scapherpeton tectum60 sites
- Champsosaurus57 sites
- Ceratopsidae55 sites
- Diacodexis metsiacus54 sites
- Baenidae53 sites
- Borealosuchus sternbergii52 sites
- Crocodylia48 sites
- Compsemys victa46 sites
- Homogalax protapirinus46 sites
- Aves45 sites
- Ectocion osbornianus42 sites
- Phenacodus intermedius42 sites
- Chelydridae41 sites
- Hyopsodus loomisi41 sites
- Opisthotriton kayi40 sites
- Adocus38 sites
- Paronychodon37 sites
- Coryphodon eocaenus35 sites
The Paleobiology Database records 556 sites for Alligatoridae, 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
249 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 boundary79
- The late Miocene caimanine fauna (Crocodylia: Alligatoroidea) of the Urumaco Formation, Venezuela28
- Fossil Vertebrate Collections27
- Vertebrate faunal changes through Lancian and Puercan time in southern Wyoming27
- Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota25
- Multi-isotope analysis on the Yangtze Alligator osteoderm unearthed from Yellow River Valley during the Longshan Period19
- A Miocene hyperdiverse crocodylian community reveals peculiar trophic dynamics in proto-Amazonian mega-wetlands19
- Fossil crocodilians from Colombia and the Cenozoic history of the Crocodilia in South America19
- Crocodylian diversity peak and extinction in the late Cenozoic of the northern Neotropics17
- A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru16
- Fossil vertebrates from the Late Cretaceous Lance Formation, eastern Wyoming16
- Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman Formations of the Judith River Group (Campanian) of southeastern Alberta: an illustrated guide15
Each of the 699 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. 237 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 Alligatoridae
- Source
- Wikidata/Commons
- Credit
- =
- Licence
- Public Domain
- Commercial use
- the licence allows it
No 3D scan of Alligatoridae 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itGlobidonta through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Gray 1844)