当前位置: X-MOL 学术Geobios › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A new basal raoellid artiodactyl (Mammalia) from the middle Eocene Subathu Group of Rajouri District, Jammu and Kashmir, northwest Himalaya, India
Geobios ( IF 1.6 ) Pub Date : 2021-04-02 , DOI: 10.1016/j.geobios.2020.12.003
Rajendra Singh Rana , Mohd Waqas , Maeva Orliac , Annelise Folie , Thierry Smith

A new artiodactyl of moderate size, Rajouria gunnelli nov. gen., nov. sp., is described on the basis of several dentaries, maxillae and isolated teeth from the middle Eocene Subathu Group of the Kalakot area, Rajouri District, Jammu and Kashmir, India. Despite its general resemblance with the family Dichobunidae by the retention of a paraconid on m1-2 and a simple P4 where endocristids do not form an anterior loph, this taxon shares with Raoellidae two unambiguous characters: the presence of a hypoconid on p4, and an asymmetrical P4. The phylogenetic position of the new taxon within the Cetacea–Raoellidae clade is strongly supported by seven non ambiguous synapomorphies, among which a cristid obliqua on lower molars anteriorly pointing towards the postectoprotocristid, and a P3 with only two roots. The presence of a new basal raoellid in the middle Eocene Subathu Group sheds new light on the phylogeny and paleobiogeography of raoellid artiodactyls.



中文翻译:

来自印度喜马拉雅西北部查谟和克什米尔 Rajouri 区中始新世 Subathu 群的一种新的基础 raoellid 偶蹄动物(哺乳动物)

一种新的中等大小的偶蹄动物,Rajouria gunnelli十一月 将军,十一月 sp.,是根据印度查谟和克什米尔拉朱里区 Kalakot 地区始新世 Subathu 群中始新世 Subathu 群的几个齿齿、上颌骨和孤立的牙齿进行描述的。尽管它与 Dichobunidae 科在 m1-2 和一个简单的 P4 上保留了一个 paraconid 和一个简单的 P4 相似,其中endocristids 不形成前 loph,但这个分类群与 Raoellidae 有两个明确的特征:在 p4 上存在一个次分节,以及不对称 P4。Cetacea-Raoellidae 进化枝中新分类群的系统发育位置得到了七个明确的突触的有力支持,其中下臼齿上的 cristid obliqua 向前指向后外前突,而 P3 只有两个根。

更新日期:2021-04-02
down
wechat
bug