首页|The first record of dermochelyid turtles in the Eocene of Tierra del Fuego:new insights on the evolution of the Weddellian faunas

The first record of dermochelyid turtles in the Eocene of Tierra del Fuego:new insights on the evolution of the Weddellian faunas

扫码查看
原文链接
  • 万方数据
  • 维普
The Antarctic Paleogene marine fossil record has been the key to reconstructing the evolution of the Weddellian Sea and final dismemberment of Southern Gondwana.In this context,Eocene marine vertebrates from Seymour(Marambio)Island have provided valuable information.We present the first Eocene record of marine reptiles from the southern Atlantic Coast of South America.This corresponds to several postcranial turtle remains represented by a proximal end of the right humerus,three caudal and one thoracic vertebrae,a fragment of the left pubis,and ten ossicles of the dorsal carapace,coming from the Leticia Formation(late-mid Eocene)at Cabo Tiburones,Tierra del Fuego,Argentina.These materials show several features such as the size and general morphology of the humerus and vertebrae,and the presence of relatively small,irregular,smooth,and unkeeled ossicles,which allow us to assign them to Dermochelyidae indet.Dermochelyids are a cosmopolitan group of cryptodiran turtles,registered from the late Cretaceous up to the recent,with some physiological-biological peculiarities(e.g.,endothermy and an exclusive jellyfish-based diet)and characterized by the presence of an osseous carapace formed by ossicles.The new finding from the Leticia Formation is an addition to the scarce and extremely fragmentary record of Eocene dermochelyids from the southern seas like those from the La Meseta and Submeseta formations(Antarctica)and the Waihao and Burnside formations(New Zealand).This new information allows us to discuss the presence of these turtles in such high latitudes in the past and its implication in the evolution of the Weddellian fauna.

marine reptilessea turtlesDermochelyidaePaleogeneLa Meseta FormationSubmeseta FormationLeticia Formation

Paula BONA、Juliana STERLI、Marcelo Saúl de la FUENTE、Eduardo OLIVERO、Marta S.FERNáNDEZ、Marcelo REGUERO

展开 >

División Paleontología Vertebrados,Museo de La Plata-Anexo Ⅱ,Facultad de Ciencias Naturales y Museo,Universidad Nacional de La Plata,La Plata B1900FWA,Argentina

Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET),Ciudad Autónoma de Buenos Aires C1425FQB,Argentina

Museo Paleontológico Egidio Feruglio,Trelew U9100,Argentina

Instituto de Evolución,Ecología Histórica y Ambiente-CONICET,San Rafael CP5600,Argentina

Centro Austral de Investigaciones Científicas-CONICET,Universidad Nacional de Tierra del Fuego,Ushuaia CP 9410,Argentina

División Paleontología Vertebrados,Museo de La Plata,Universidad Nacional de La Plata,La Plata B1900FWA,Argentina

展开 >

Agencia Nacional de Promoción Científica y Tecnológica-Proyectos de Investigación Científica y TecnológicaAgencia Nacional de Promoción Científica y Tecnológica-Proyectos de Investigación Científica y Tecnológica

PICT 2017-0607PICT 2019-00327

2024

10.12429/j.advps.2023.0026

极地科学进展(英文版)
中国极地研究中心,国家海洋局极地考察办公室 (Polar Research Institute of China, Chinese Arctic and Antarctic Administration)

极地科学进展(英文版)

影响因子：0.145
ISSN：1674-9928
年,卷(期)：2024.34(1)
  • 79