Abstract

A new genus and species of pareiasaurs, Senectosaurus karamzini Boyarinova et Golubev gen. et sp. nov., is described based on remains of the postcranial skeleton of a large adult individual from the Lower Vyatkian of the Preobrazhenka-2 locality (Orenburg Region). The new pareiasaur is characterized by large postcranial platform-type osteoderms. The osteoderms are flattened, with flat ventral and slightly convex dorsal surfaces, and one to three contact facets of serrate or squamous sutures with adjacent osteoderms, without dorsal elevation and fossae circumcinctae but with numerous large fossae on the dorsal surface of the platform. The absence of the dorsal elevation distinguishes the new pareiasaur from all known pareiasaurs with postcranial osteoderms.

中文翻译：

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来自俄罗斯奥伦堡地区下维亚特基亚系（上二叠统）的新奇龙（Parareptilia）

摘要

帕累亚龙的一个新属和新种，Senectosaurus karamzini Boyarinova et Golubev gen。等 11 月，是根据 Preobrazhenka-2 地区（奥伦堡地区）下维亚特基阶的一个大型成年个体的颅后骨骼遗骸进行描述的。新的丑角龙的特点是具有巨大的颅后平台型骨皮。骨皮扁平，腹侧平坦，背表面微凸，与相邻骨皮有1～3个锯齿状或鳞状缝线接触面，无背侧隆起和环割窝，但平台背表面有许多大窝。背侧隆起的缺失将新的帕累亚龙与所有已知的具有颅后骨皮的帕累亚龙区别开来。