在黑龙江省上侏罗统中发现新遗迹化石

A new trace fossil genus from Jurassic Longzhaogou in Eastern Heilongjiang, china

本文所描述的遗迹化石系笔者于1980年夏,随同长春地质学院的老师赴黑龙江省参加黑龙江省东部龙爪沟群专题研究时,在密山地区过关山附近上侏罗统云山组中所发现的。化石保存在一层巨厚的滨浅海相黑色泥岩里。经研究,确定它是一个新遗迹属。在研究过程中,承蒙门凤岐和杨式溥老师在百忙中给予了亲切的指导和帮助;我所照像室陈殿丰技师摄制图片,在此一并表示衷心的感谢.

The Jurassic marine trace fossil described has been found for the first time from the Upper Jurassic Yunshan Formation, County, Mishan Eastern Heilongjiang. It is a new trace fossil genus occurring at the Upper surface of a black mud—stone. The new trace fossil genus Mishanichnus is described below: Ichnus showing long,simple sinuous, width of trail 4 to lo mm., both sides not smooth, but border cleared quite. Median consisted of numerous meniscus ribs ranged by different interval. No branching.