小玻璃介

小玻璃介（Candona parva Peng, 2000）是採集於大理白族自治州鶴慶盆地的化石標本。

基本介紹

• 中文名：小玻璃介
• 外文名：Candona parva Peng, 2000
• 產地：大理白族自治州鶴慶盆地
• 保存單位： 中國科學院南京地質古生物研究所

特徵描述

carapace small, elongate reniform in lateral view; anterior end round; posterior end narrowly round; dorsal margin nearly straight, oblique forward slightly, gently arched in posterior half, ventral margin concave in the middle; both ends oblique downwards. inner lamella broad; marginal zone narrow. quincuncial adductor muscle scars pattern, a row of three scars in front and a row of two scars behind, a large elongate scar above this group; two clear mandibular scars in front of and below the adductor muscle scars. left valve conspicuously larger than the right, especially at the anterodorsal and posterodorsal angles. in dorsal view, maximum width posteriorly, both ends acute. surface covered with fine-granular lines and reticulations.

主要用途

地層劃分與對比。