文章基本信息

标题：Parental care or opportunism in South African Triassic cynodonts?
本地全文：下载
作者：Julien Benoit
期刊名称：South African Journal of Science
印刷版ISSN：0038-2353
电子版ISSN：1996-7489
出版年度：2019
卷号：115
期号：3-4
页码：2-3
DOI：10.17159/sajs.2019/5589
语种：English
出版社：The Foundation for Research Development
摘要：In a paper published in Nature in 2018, Hoffman and Rowe 1 describe the discovery of an adult tritylodontid cynodont, Kayentatherium, from the Jurassic of the Kayenta Formation (Arizona, USA), accompanied by at least 38 perinatal juveniles, all at the same very early stage of development. Such a high number of juveniles in one clutch is found only in a handful of oviparous reptiles, and never in viviparous or ovoviviparous species 1 , suggesting that these cynodonts laid eggs. As tritylodontids are amongst the closest relatives to Mammaliaformes, and sometimes even reconstructed as their sister clade 2 , this textbook changing discovery implies that all non-mammaliaform synapsids had an essentially reptilian-like reproductive biology 1 .
关键词：Cynodontia;shelter-sharing;lactation;juvenile mortality;parental care