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A new species of the carnivorous cynodont Chiniquodon (Cynodontia, Chiniquodontidae) from the Namibian Triassic
Journal of Vertebrate Paleontology ( IF 1.4 ) Pub Date : 2020-07-02 , DOI: 10.1080/02724634.2019.1754231
Helke B. Mocke 1, 2 , Leandro C. Gaetano 2, 3 , Fernando Abdala 2, 4
Affiliation  

Chiniquodontidae is a family of Triassic carnivorous cynodonts well represented in the Middle–Upper Triassic of Argentina and Brazil and, more recently, discovered in Madagascar and central Namibia. The Namibian specimen was found in the uppermost levels of the upper Omingonde Formation and is represented by the skull and partial skeleton. In this contribution, we provide a diagnosis for Chiniquodon omaruruensis, sp. nov., describe the postcranial material, and compare it with that of South American Chiniquodon specimens. Chiniquodon omaruruensis provides the first evidence of elements from the pes in Chiniquodon, and one of the few for non-mammaliaform cynodonts. Chiniquodon omaruruensis has a remarkably large calcaneus with an incipiently differentiated tuber, metatarsal II lateromedially robust but remarkably shorter than metatarsal IV, and an almost quadrangular basal phalanx in digit III. Similar to other Chiniquodon species, it lacks costal plates on ribs and shows a tall and slender scapular blade, a large acromion process positioned well above the scapular neck, and the absence of disc-like phalanges in the autopodium.



中文翻译:

食肉犬齿兽亚目一新种奇尼瓜齿兽属从纳米比亚三叠纪(Cynodontia,奇尼瓜齿兽科)

Chiniquodontidae是三叠纪肉食犬齿科的一个家族,在阿根廷和巴西的中上三叠纪中有很好的代表,最近在马达加斯加和纳米比亚中部也发现了。纳米比亚标本被发现在上部奥明贡德组的最上层,以头骨和部分骨骼为代表。在此贡献中,我们提供了对Chiniquodon omaruruensis sp。的诊断。十一月,描述颅后材料,并将其与南美Chiniquodon标本进行比较。Chiniquodon omaruruensis提供了Chiniquodon pes中的元素的第一个证据,也是少数非哺乳动物的犬齿类动物之一。奇尼瓜齿兽属 omaruruensis跟骨具有明显的跟骨,块茎开始分化,,骨II稍具健壮性,但比IV骨IV短,并且在数字III处有近四边形的基底指骨。与其他Chiniquodon物种相似,它在肋骨上没有肋骨板,显示出一个高而细长的肩cap骨刀片,一个位于肩骨颈上方的大型肩峰突触过程,并且在自足足动物中没有盘状指骨。

更新日期:2020-07-02
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