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韩凤禄等,PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2021

发表时间:2021-11-25编辑:王德珲点击:

A large and unusually thick-shelled turtle egg with embryonic remains from the Upper Cretaceous of China

作者

Ke, YZ (Ke, Yuzheng)   Wu, R (Wu, Rui)   Zelenitsky, DK (Zelenitsky, Darla K.)   Brinkman, D (Brinkman, Don)   Hu, JF (Hu, Jinfeng)   Zhang, SK (Zhang, Shukang)   Jiang, HS (Jiang, Haishui)   Han, FL (Han, Fenglu)  

288  

1957  

文献号

20211239

DOI

10.1098/rspb.2021.1239

出版时间

AUG 25 2021

文献类型

Article

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摘要

Turtle eggs containing embryos are exceedingly rare in the fossil record. Here, we provide the first description and taxonomic identification, to our knowledge, of a fossilized embryonic turtle preserved in an egg, a fossil recovered from the Upper Cretaceous Xiaguan Formation of Henan Province, China. The specimen is attributed to the Nanhsiungchelyidae (Pan-Trionychia), an extinct group of large terrestrial turtles (possibly the species Yuchelys nanyangensis). The egg is rigid, spherical, and is one of the largest and thickest shelled Mesozoic turtle eggs known. Importantly, this specimen allowed identification of other nanhsiungchelyid egg clutches and comparison to those of Adocidae, as Nanhsiungchelyidae and Adocidae form the basal extinct clade Adocusia of the Pan-Trionychia (includes living soft-shelled turtles). Despite the differences in habitat adaptations, nanhsiungchelyids (terrestrial) and adocids (aquatic) shared several reproductive traits, including relatively thick eggshells, medium size clutches and relatively large eggs, which may be primitive for trionychoids (including Adocusia and Carrettochelyidae). The unusually thick calcareous eggshell of nanhsiungchelyids compared to those of all other turtles (including adocids) may be related to a nesting style adaptation to an extremely harsh environment.

关键词

 

 

作者信息

通讯作者地址

Han, Fenglu    

(通讯作者)

China Univ Geosci Wuhan, Sch Earth Sci, Wuhan 430074, Peoples R China    

 

 

电子邮件地址

hanfl@cug.edu.cn  

类别/分类

研究方向

Life Sciences & Biomedicine - Other Topics   Environmental Sciences & Ecology   Evolutionary Biology

基金资助