小型原粗步甲

小型原粗步甲（Protorabus minisculus Zhang, 1997）是採集於志新盆地的化石標本。

基本介紹

• 中文名：小型原粗步甲
• 外文名：Protorabus minisculus Zhang, 1997
• 產地：志新盆地
• 保存單位： 中國科學院南京地質古生物研究所

特徵描述

Body smaller, with larger head; clypeus nearly trapezoidal, not reaching base of antennae; eyes large, round and lateral; antennae filiform; scape large and rectangular, others nearly trapzoidal and longer than width. Pronotum transversely broad; a longitudinal ridge in the middle reaching anterior and posterior borders. Elytra longer, humeral angle slightly obtuse; lateral margin arcuate, base; several weak longitudinal striae on surface. Fore and middle legs with femora stout, tibiae thin; hindlegs with coxae large, inclinate and nearly triangular, femora thicker than fore and middle, tibiae slender and having a longitudinal ridge.

主要用途

地層劃分與對比。