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Article: A small podocnemidoid (Pleurodira, Pelomedusoides) from the Late Cretaceous of Brazil, and the innervation and carotid circulation of side‐necked turtles

Papers in Palaeontology - Volume 6 Issue 2 - Cover
Publication: Papers in Palaeontology
Volume: 6
Part: 2
Publication Date: May 2020
Page(s): 329 347
Author(s): Guilherme Hermanson, Fabiano V. Iori, Serjoscha W. Evers, Max C. Langer, and Gabriel S. Ferreira
DOI: 10.1002/spp2.1300
Addition Information

How to Cite

HERMANSON, G., IORI, F.V., EVERS, S.W., LANGER, M.C., FERREIRA, G.S. 2020. . Papers in Palaeontology, 6, 2, 329-347. DOI: /doi/10.1002/spp2.1300

Author Information

  • Guilherme Hermanson - Laboratório de Paleontologia de Ribeirão Preto FFCLRP Universidade de São Paulo Ribeirão Preto Brazil
  • Fabiano V. Iori - Museu de Paleontologia ‘Prof. Antonio Celso de Arruda Campos’ Centro de Artes Praça do Centenário 15910‐000 Monte Alto Brazil
  • Fabiano V. Iori - Museu de Paleontologia ‘Pedro Candolo’ Estação Cultura, Praça Farmacêutico Bruno Garisto 15890‐000 Uchoa Brazil
  • Serjoscha W. Evers - Department of Earth Sciences University of Oxford South Parks Road Oxford OX1 3AN UK
  • Serjoscha W. Evers - Department of Geosciences University of Fribourg Chemin du Musée 1700 Fribourg Switzerland
  • Max C. Langer - Laboratório de Paleontologia de Ribeirão Preto FFCLRP Universidade de São Paulo Ribeirão Preto Brazil
  • Gabriel S. Ferreira - Laboratório de Paleontologia de Ribeirão Preto FFCLRP Universidade de São Paulo Ribeirão Preto Brazil
  • Gabriel S. Ferreira - Fachbereich Geowissenschaften der Eberhard‐Karls‐Universität Tübingen Hölderlinstraße 12 72074 Tübingen Germany

Publication History

  • Issue published online: 25 April 2020
  • Manuscript Accepted: 25 November 2019
  • Manuscript Received: 05 August 2019

Funded By

Fundação de Amparo à Pesquisa do Estado de São Paulo. Grant Numbers: 2014/03825‐3, 2014/25379‐5, 2016/03373‐0
Natural Environment Research Council. Grant Number: NE/L0021612/1

Online Version Hosted By

Wiley Online Library
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Pleurodires are less diverse than cryptodires, together forming the two major lineages of crown turtles. Their fossil record, however, is rich. A particularly large number of fossil pleurodires, many belonging to the Podocnemidoidae, has been recovered from the Upper Cretaceous Bauru Group outcrops of south‐central Brazil. Herein we describe an additional pleurodire from this region, Amabilis uchoensis gen. et sp. nov., based on a partially preserved skull. A. uchoensis is recognized as belonging to the Podocnemidoidae by the small entrance to the antrum postoticum and completely developed cavum pterygoidei, being unique among other non‐podocnemidid podocnemidoids for its medially open fenestra postotica and absent basioccipital–opisthotic contact. Our cladistic analysis places A. uchoensis as a sister taxon to Hamadachelys + other podocnemidoids. We further explore the neuroanatomy of side‐necked turtles with the aid of micro‐computed tomography of specimens of the main pleurodiran lineages. Our data shed light on the different carotid circulation patterns in pleurodires, and we propose new phylogenetic characters to describe the neuroanatomical variation of the group. Optimization of these characters shows two independent acquisitions of a foramen for the palatal branch of the carotid in chelids and podocnemidoids, and a unique loss of the vidian nerve canal in chelids, in turtles in general.

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