群棲隱翅幽蚊

群棲隱翅幽蚊（Chironomaptera gregaria Grabau, 1923, Ping, 1928）是採集於延邊朝鮮族自治州智新盆地的化石標本。

基本介紹

• 中文名：群棲隱翅幽蚊
• 外文名：Chironomaptera gregaria Grabau, 1923, Ping, 1928
• 產地：延邊朝鮮族自治州智新盆地
• 保存單位： 中國科學院南京地質古生物研究所

特徵描述

head transversely broad; antennal fossae rounded; eyes large, kidney-shaped, lateral. thorax oval, broader than head. legs with only left middle femur, slender and straight. abdomen cylindrical, nine-segmented, a little narrower and shorter than thorax; the first to the seventh segments nearly equal in width, the eighth narrower and shorter than the seventh and the ninth much smaller, armed with a pair of circular genital appendages.

主要用途

地層劃分與對比。