Varanopid from the Carboniferous of Nova Scotia reveals evidence of parental care in amniotes.,Nature Ecology & Evolution

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Varanopid from the Carboniferous of Nova Scotia reveals evidence of parental care in amniotes.
Nature Ecology & Evolution ( IF 13.9 ) Pub Date : 2019-12-23 , DOI: 10.1038/s41559-019-1030-z
Hillary C Maddin ₁ , Arjan Mann ₁ , Brian Hebert ₂

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Here we report on a fossil synapsid, Dendromaia unamakiensis gen. et sp. nov., from the Carboniferous period of Nova Scotia that displays evidence of parental care-approximately 40 million years earlier than the previous earliest record based on a varanopid from the Guadalupian (middle Permian) period of South Africa. The specimen, consisting of an adult and associated conspecific juvenile, is also identified as a varanopid suggesting parental care is more deeply rooted within this clade and evolved very close to the origin of Synapsida and Amniota in general. This specimen adds to growing evidence that parental care was more widespread among Palaeozoic synapsids than previously thought and further provides data permitting the identification of potential ontogeny-dependent traits within varanopids, the implications of which impact recent competing hypotheses of the phylogenetic affinities of the group.

中文翻译：

来自新斯科舍省石炭纪的Varanopid揭示了羊膜动物父母照顾的证据。

在这里，我们报告化石突触，Dendromaia unamakiensis gen。等 11月，来自新斯科舍省的石炭纪时期，该时期显示了父母的照料证据，比以前的最早记录大约早了4,000万年。该标本由成年和相关的特定幼体组成，也被鉴定为varanopid，表明父母照料在该进化枝中更深层次，并且进化得与Synapsida和Amniota的起源非常接近。这个标本增加了越来越多的证据，表明父母养育在古生代突触中的分布比以前认为的要广泛，并且进一步提供了数据，可以识别出varanopids中潜在的个体发育相关性状，

更新日期：2019-12-23

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