An alternative interpretation of the Paleogene turtle Cardichelyon rogerwoodi as a hinged kinosternoid
| Autor: | Julien Claude, Walter G. Joyce |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010506 paleontology biology Dermatemydidae Paleontology Kinosternoidea Platysternon megacephalum biology.organism_classification 010603 evolutionary biology 01 natural sciences law.invention Testudinoidea External data Geography law Large head Turtle (robot) Paleogene 0105 earth and related environmental sciences |
| Zdroj: | Journal of Paleontology. 94:557-567 |
| ISSN: | 1937-2337 0022-3360 |
| Popis: | Cardichelyon rogerwoodi is an enigmatic fossil turtle from the late Paleocene to early Eocene of North America. Previous analyses suggested affiliation with Testudinoidea, in particular the big-headed turtle Platysternon megacephalum, based on the presence of multiple musk-duct foramina and a large head. We here highlight previously undocumented characteristics for this turtle, notably the presence of short costiform processes, a rib-like axillary process, and a posterior plastral hinge. Phylogenetic analysis places Cardichelyon rogerwoodi within Testudinoidea, but the exclusion of testudinoids suggest an affiliation with Dermatemydidae. Using consilience with external data we favor placement within Kinosternoidea. Cardichelyon rogerwoodi is therefore an aberrant, hinged kinosternoid that developed in situ in North America during the Paleocene long before the arrival of testudinoids on this continent in the early Eocene. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|