近條紋馬柯伊蛤

近條紋馬柯伊蛤（Maccoyella cf. substriata Moore）是採集於藏南地區崗巴群的化石標本。

基本介紹

• 中文名：近條紋馬柯伊蛤
• 外文名：Maccoyella cf. substriata Moore
• 產地：藏南地區崗巴群
• 保存單位： 中國科學院南京地質古生物研究所

特徵描述

shell small, horizontally elliptical, moderately convex, aclinic. posterior wing distinctly produced, without boundary with body of valve. ornament consisting of principal and secondary radial riblets which showing no difference in thickness and taking place at umbonal area, and much finer tertiary riblets which spreading in anterior and posterior surface and at middle-late growth stage; concentric lines even and intermittently developing in the intervals between radial riblets. ligamental area broad, horizontally lengthening, chiefly placed the limits after beak; a tooth scar marked before ligamental area.

主要用途

地層劃分與對比。