Chelidae
Searched as Chelidae indet.. The Paleobiology Database treats Chelidae as the accepted name.
Chelidae is one of three living families of the turtle suborder Pleurodira, and are commonly called Austro-South American side-neck turtles. The family is distributed in Australia, New Guinea, Eastern Indonesia, and throughout most of South America. It is a large family of turtles with a significant fossil history dating back to the Cretaceous. The family is entirely Gondwanan in origin, with no members found outside Gondwana, either in the present day or as a fossil.

Vitoria Fortes · 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
- PleurodiraPBDB
- Diet
- piscivorePBDB
- Life habit
- amphibious, solitaryPBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- freshwaterPBDB
Time the record covers
At least 113 million years on record.
The record covers at least 113.2 Mya to 129 ka. No occurrence read is dated outside 121.4 Mya to 0 Mya.
162 occurrences of Chelidae 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
162 occurrencesThese 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
45 formations
- La Colonia Formation43
- Salamanca Formation26
- Allen Formation · Malargüe Group14
- Sarmiento Formation8
- Huayquerías Formation6
- Griman Creek Formation · Rolling Downs Group5
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The named rock units Chelidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 21 further formations hold fewer occurrences each and are not listed. 10 occurrences have no formation on record, which is common for older literature.
Chelidae and its relatives
Late CretaceousWhere Chelidae and its relatives were recorded in the Late Cretaceous.
Found in the same rock
1,162 taxa- Yaminuechelys26 sites
- Chelus20 sites
- Teleostei17 sites
- Metaceratodus baibianorum16 sites
- Chelus colombiana14 sites
- Crocodyliformes12 sites
- Emydura11 sites
- Meiolaniformes11 sites
- Testudines11 sites
- Crocodylia10 sites
- Hydromedusa casamayorensis10 sites
- Lepisosteidae10 sites
- Osteichthyes10 sites
- Dinosauria9 sites
- Mammalia9 sites
- Plesiosauria9 sites
- Testudinata9 sites
- Titanosauria9 sites
- Caimaninae7 sites
- Chelonoidis7 sites
- Podocnemididae7 sites
- Purussaurus7 sites
- Toxodontidae7 sites
- Abelisauridae6 sites
The Paleobiology Database records 269 sites for Chelidae, 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
46 references- Contribution to the diversity of the fossil record of turtles (Testudinidata) from Chubut province (Argentina) and its significance in understanding the evolution of turtles in southern South America45
- Past, present, and future of southern Gondwanan turtles: a view from the South27
- Les tortues fossiles d'Argentine: synthese [The fossil turtles of Argentina: synthesis]11
- The end of the dinosaur era in Patagonia (NatGeo Project)10
- Tortoises and turtles from Huayquerías del Este (late Miocene–early Pliocene), Mendoza, Argentina6
- Early Cretaceous chelids from Lightning Ridge, New South Wales5
- Eocene chelid turtles from Redbank Plains, Southeast Queensland4
- Tortugas y plesiosaurios de la Formacion la Colonia (Cretacico Superior) de Patagonia, Argentina4
- A Review of the Fossil Turtles of Australia4
- A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru3
- Vertebrados cretácicos de la Formación Loncoche en Calmu-Co, Mendoza, Argentina [Cretaceous vertebrates from the Loncoche Formation in Calmu-Co, Mendoza, Argentina]3
- Late Cretaceous vertebrates from Bajo de Santa Rosa (Allen Formation), Río Negro province, Argentina, with the description of a new sauropod dinosaur (Titanosauridae)3
Each of the 162 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. 34 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 Chelidae
- Source
- Wikipedia/Commons
- Credit
- Vitoria Fortes
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Chelidae 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
- Source
- Wikipedia, “Chelidae”
- 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 itPleurodira through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Gray 1825)