Biology:Chelus
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Chelus is a genus of large freshwater turtles found in tropical South America. Formerly considered to be a monotypic genus,[1] it now consists of two extant species after Chelus orinocensis was identified in 2020 from a genetic analysis.[2]
Evolution
Fossils of the extinct †C. colombianus have been found in Venezuela, Colombia, and Brazil, including a skull dating to the early Miocene (~ 16 m.y.) of the Castilletes Formation, Cocinetas Basin, in Colombia. The fossil shows that the skull morphology of Chelus has been almost unchanged since the Miocene.[3][4]
Species
There are two extant recognized species in this genus[1][5] and one extinct species:[6]
- Chelus fimbriatus – Amazon mata mata
- Chelus orinocensis – Orinoco mata mata
- †Chelus colombianus – Columbian mata mata (Early-Late Miocene)[7][4]
References
- ↑ 1.0 1.1 Rhodin, Anders G.J.; Inverson, John B.; Roger, Bour; Fritz, Uwe; Georges, Arthur; Shaffer, H. Bradley; van Dijk, Peter Paul (2021). "Turtles of the world, 2021 update: Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status (9th Ed.)". Chelonian Research Monographs. Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group 9: 1–472. doi:10.3854/crm.8.checklist.atlas.v9.2021. ISBN 978-1-5323-5026-9.
- ↑ Sanchez-Vilaga, Marcelo R.; Prichard, Peter C. H.; Paolillo, Alfredo; Linares, Omar J. (January 1995). "Geographic variation in the matamata turtle, Chelus fimbriatus, with observations on its shell morphology and morphometry". Chelonian Conservation and Biology 1: 292–300. https://chelonian.org/wp-content/uploads/file/CCB%20Vol%201%20No%204%20(1995)/Sanchez-Villagra_etal_1995.pdf.
- ↑ Cadena, Ea; Jaramillo, Ca (2015). "The first fossil skull of Chelus (Pleurodira: Chelidae, Matamata turtle) from the early Miocene of Colombia" (in en). Palaeontologia Electronica. doi:10.26879/545. ISSN 1094-8074. http://palaeo-electronica.org/content/2015/1245-chelus-fossil-skull.
- ↑ 4.0 4.1 Ferreira, Gabriel S.; Rincón, Ascanio D.; Solórzano, Andrés; Langer, Max C. (April 2016). "Review of the fossil matamata turtles: earliest well-dated record and hypotheses on the origin of their present geographical distribution" (in en). The Science of Nature 103 (3-4). doi:10.1007/s00114-016-1355-2. ISSN 0028-1042. http://link.springer.com/10.1007/s00114-016-1355-2.
- ↑ Chelus at the Reptarium.cz Reptile Database
- ↑ "Chelus Duméril 1806". Paleobiology Database. https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=37611.
- ↑ Wood, Roger Conant (1975). "Two new species of Chelus (Testudines: Pleurodira) from the Late Tertiary of northern South America". Breviora 435: 1–26. https://www.biodiversitylibrary.org/part/32639.
Template:Pleurodira Template:Testudines Wikidata ☰ Q14566138 entry
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