Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain
Pelomedusoides constitutes the most diverse group of Mesozoic and Cenozoic side-necked turtles. However, when it originated is still being poorly known and controversial. Fossil remains from the Early Cretaceous (Valanginian) Rosa Blanca Formation of Colombia were described almost a decade ago as po...
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PeerJ Inc.
2020-08-01
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| Online Access: | https://peerj.com/articles/9810.pdf |
| _version_ | 1797425523233652736 |
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| author | Edwin-Alberto Cadena |
| author_facet | Edwin-Alberto Cadena |
| author_sort | Edwin-Alberto Cadena |
| collection | DOAJ |
| description | Pelomedusoides constitutes the most diverse group of Mesozoic and Cenozoic side-necked turtles. However, when it originated is still being poorly known and controversial. Fossil remains from the Early Cretaceous (Valanginian) Rosa Blanca Formation of Colombia were described almost a decade ago as potentially belonging to Podocnemidoidea (a large subclade inside Pelomedusoides) and representing one of the earliest records of this group of turtles. Here, I revise this hypothesis based on a new fragmentary specimen from the Rosa Blanca Formation, represented by a right portion of the shell bridge, including the mesoplastron and most of peripherals 5 to 7. The equidimensional shape of the mesoplatron allows me to support its attribution as belonging to Pelomedusoides, a group to which the previously podocnemidoid material is also attributed here. Although the Valanginian pelomesudoid material from Colombia is still too fragmentary as to be considered the earliest indisputable record of the Pelomedusoides clade, their occurrence is at least in agreement with current molecular phylogenetic hypotheses that suggest they split from Chelidae during the Jurassic and should occur in the Late Jurassic and Early Cretaceous fossil record. |
| first_indexed | 2024-03-09T08:17:21Z |
| format | Article |
| id | doaj.art-1e0b22faea6a4d7f934afcaded2b897a |
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| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T08:17:21Z |
| publishDate | 2020-08-01 |
| publisher | PeerJ Inc. |
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| spelling | doaj.art-1e0b22faea6a4d7f934afcaded2b897a2023-12-02T21:59:34ZengPeerJ Inc.PeerJ2167-83592020-08-018e981010.7717/peerj.9810Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remainEdwin-Alberto Cadena0Facultad de Ciencias Naturales, Grupo de Investigación Paleontología Neotropical Tradicional y Molecular (PaleoNeo), Universidad del Rosario, Bogotá, ColombiaPelomedusoides constitutes the most diverse group of Mesozoic and Cenozoic side-necked turtles. However, when it originated is still being poorly known and controversial. Fossil remains from the Early Cretaceous (Valanginian) Rosa Blanca Formation of Colombia were described almost a decade ago as potentially belonging to Podocnemidoidea (a large subclade inside Pelomedusoides) and representing one of the earliest records of this group of turtles. Here, I revise this hypothesis based on a new fragmentary specimen from the Rosa Blanca Formation, represented by a right portion of the shell bridge, including the mesoplastron and most of peripherals 5 to 7. The equidimensional shape of the mesoplatron allows me to support its attribution as belonging to Pelomedusoides, a group to which the previously podocnemidoid material is also attributed here. Although the Valanginian pelomesudoid material from Colombia is still too fragmentary as to be considered the earliest indisputable record of the Pelomedusoides clade, their occurrence is at least in agreement with current molecular phylogenetic hypotheses that suggest they split from Chelidae during the Jurassic and should occur in the Late Jurassic and Early Cretaceous fossil record.https://peerj.com/articles/9810.pdfZapatocaTestudinesColombiaRosa Blanca Formation |
| spellingShingle | Edwin-Alberto Cadena Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain PeerJ Zapatoca Testudines Colombia Rosa Blanca Formation |
| title | Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain |
| title_full | Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain |
| title_fullStr | Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain |
| title_full_unstemmed | Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain |
| title_short | Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain |
| title_sort | valanginian occurrence of pelomedusoides turtles in northern south america revision of this hypothesis based on a new fossil remain |
| topic | Zapatoca Testudines Colombia Rosa Blanca Formation |
| url | https://peerj.com/articles/9810.pdf |
| work_keys_str_mv | AT edwinalbertocadena valanginianoccurrenceofpelomedusoidesturtlesinnorthernsouthamericarevisionofthishypothesisbasedonanewfossilremain |