Chelidae
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.

Uncredited · 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 11.7 ka. No occurrence read is dated outside 121.4 Mya to 0 Mya.
344 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
344 occurrences- Early Cretaceous2%
- Late Cretaceous39%
- Paleocene11%
- Eocene8%
- Oligocene2%
- Miocene19%
- Pliocene5%
- Pleistocene11%
- 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
77 formations
- La Colonia Formation71
- Salamanca Formation34
- Solimões Formation22
- Sarmiento Formation18
- Allen Formation · Malargüe Group16
- Loncoche Formation · Malargüe Group6
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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. 53 further formations hold fewer occurrences each and are not listed. 38 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
121 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 America55
- Past, present, and future of southern Gondwanan turtles: a view from the South48
- Georeferencing fossiliferous localities from Solimões and Acre Basins (Brazil) -what we know so far about Solimões Formation and future perspectives21
- The end of the dinosaur era in Patagonia (NatGeo Project)10
- Les tortues fossiles d'Argentine: synthese [The fossil turtles of Argentina: synthesis]9
- Eocene chelid turtles from Redbank Plains, Southeast Queensland8
- Las tortugas Chelidae del Terciario superior y Cuaternario del territorio argentino7
- A Review of the Fossil Turtles of Australia7
- Tortoises and turtles from Huayquerías del Este (late Miocene–early Pliocene), Mendoza, Argentina6
- Turtles from the Mata Amarilla Formation (Cenomanian), Santa Cruz, Argentina: The southernmost record of Prochelidellaspp. (Pleurodira: Chelidae)5
- Early Cretaceous chelids from Lightning Ridge, New South Wales5
- Phylogenetic and paleobiogeographic implications of Yaminuechelys maior (Staesche, 1929) new comb, a large long-necked chelid turtle from the early Paleocene of Patagonia, Argentina5
Each of the 344 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. 109 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
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
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)