期刊
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
卷 18, 期 12, 页码 1033-1055出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14772019.2020.1721579
关键词
Prochelidella buitreraensis; Cretaceous; Rio Negro Province; Argentina; phylogeny
资金
- FONCyT - Agencia Nacional de Promocion Cientifica y Tecnologica
- PICT [2010-0564, 2013-0095]
- National Geographic [8826-10, 9300-13]
The genus Prochelidella is the oldest known panchelid taxon. It is widely distributed in several Cretaceous basins throughout Patagonia, Argentina. It was previously known from three named species. A fourth species presented herein, Prochelidella buitreraensis sp. nov., preserves both cranial and postcranial material from the Candeleros Formation (La Buitrera Area) of Rio Negro Province, Argentina. Features observed in the nuchal bone (i.e. wide, trapezoidal cervical vertebrae, shallow nuchal notch) allow us to assign this specimen to the genus Prochelidella. Several specific traits (i.e. a large open retropterygoideum foramen, and a strongly developed muscle attachment site on the basisphenoid) suggest that the form from the Candeleros Formation is a new species of the genus Prochelidella. A phylogenetic analysis that includes the three best-preserved species of Prochelidella recovers this taxon as monophyletic. The Cenomanian age of this new taxon allows us to compare the panchelid turtles from the Patagonian (Neuquen) and Australian (Surat) basins.
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