A new fossil skate, Ostarriraja parva gen. et sp. nov., represented by a single partial articulated skeleton collected from the early Miocene fish-bearing strata of Upper Austria, is described here in detail. This taxon exhibits a unique combination of skeletal and dental features (e.g. nasal capsules broad and oval; presence of pectoral arch; compound radial articulated with single radial segments in serial fashion; separated pelvic girdle condyles; reduced catenated calcification of radials; about 86 pectoral radials; 20–21 pelvic-fin radials; 65–70 predorsal vertebrae) that clearly support its assignment to a new genus of the order Rajiformes, and the phylogenetic analyses reveal its basal position within the group. The comparison between Ostarriraja and the holomorphic batoids from Late Cretaceous of Lebanon traditionally aligned with skates concurs to suggest that this Neogene occurrence represents unquestionably the first known skeletal record for the group. The morphological and phylogenetic affinities of Ostarriraja with the living skates suggest a close association of this taxon with the temperate-cold water environments hypothesized for the Central Paratethys during the early Miocene.

http://zoobank.org/urn:lsid:zoobank.org:pub:8BB8F0F3-35C5-47FA-AE3C-2CBF445C4BCA

一种新的化石鳐鱼，Ostarriraja parva gen。等 11 月，以从上奥地利州早期中新世鱼类地层收集的单个部分铰接骨架为代表，此处详细描述。该分类群表现出骨骼和牙齿特征的独特组合（例如，宽而椭圆形的鼻囊；胸弓的存在；以串联方式与单个桡骨节段铰接的复合桡骨；分离的骨盆带髁；桡骨的链状钙化减少；大约86个胸桡骨；20-21 个腹鳍桡骨；65-70 个背前椎骨），这清楚地支持其归属于 Rajiformes 目的一个新属，并且系统发育分析揭示了其在该组中的基础位置。Ostarriraja与黎巴嫩白垩纪晚期的传统上与鳐鱼一致的全形蝙蝠之间的比较一致表明，这一新近纪的出现无疑代表了该群体的第一个已知骨骼记录。Ostarriraja与现存鳐鱼的形态学和系统发育亲缘关系表明，该类群与中新世早期中央副特提斯所假设的温带冷水环境有密切联系。

http://zoobank.org/urn:lsid:zoobank.org:pub:8BB8F0F3-35C5-47FA-AE3C-2CBF445C4BCA