ABSTRACT

Since 1990, several localities within the Keuper (upper Middle to Upper Triassic) strata in southern Poland have yielded remains of numerous terrestrial vertebrate species. Here we report a new Upper Triassic vertebrate assemblage from the rediscovered Kocury locality. An incomplete theropod dinosaur fibula named Velocipes guerichi described in 1932 was found there. The site was then forgotten and not explored until our excavations began in 2012, that yielded material of a lungfish, a proterochersid turtle, and a new typothoracin aetosaur Kocurypelta silvestris gen. et sp. nov. The new taxon is characterized by autapomorphies of the maxilla: an elongated edentulous posterior portion longer than 80% of the posterior maxillary process, a short medial shelf restricted to the posterior portion of the bone, an anteriorly unroofed maxillary accessory cavity, and lack of a distinct groove for choanal recess on the anteromedial surface of the bone. These new finds improve our knowledge on the vertebrate diversity of the Germanic Basin in the Late Triassic, evidencing the presence of yet unrecognized taxa. Additionally, the partial cranial aetosaur material emphasizes the issues with the aetosaurian taxonomy that is focused mostly on the osteoderm morphology.

摘要

自 1990 年以来，波兰南部 Keuper（中上至上三叠统）地层中的几个地点已经发现了许多陆生脊椎动物物种的遗骸。在这里，我们报告了来自重新发现的 Kocury 地区的一种新的上三叠纪脊椎动物组合。在那里发现了 1932 年描述的名为Velocipes guerichi的不完整的兽脚亚目恐龙腓骨。直到我们于 2012 年开始挖掘，该地点才被遗忘并没有被探索，挖掘出肺鱼、原始陆龟和新的胸甲龙Kocurypelta silvestris 的材料将军 等 sp. 十一月 新分类群的特征是上颌骨的自体形态：长于上颌后突的 80% 以上的细长无牙后部，仅限于骨后部的短内侧架，前部无顶的上颌副腔，以及缺乏在骨的前内侧表面有明显的后鼻孔隐窝凹槽。这些新发现提高了我们对晚三叠世日耳曼盆地脊椎动物多样性的认识，证明存在尚未识别的分类群。此外，部分颅骨龙类材料强调了主要关注骨皮形态学的龙类分类学的问题。