摘要
海绵化石采自四川西北部晚三叠世卡尼期汉旺组,根据一千余块海绵化石的研究,作者提出了这一海绵动物群的分类系统。大部海绵化石属于灯海绵目,其中鉴定出6个科,包括7个属,12个种。此外,一个属和一个种属于疏结海绵目。有趣的是,在已磨制的簿片中只找到一个钙质海绵纲的化石。三叠纪长期被称作是海绵演化的间断,卡尼期灯海绵及其它海绵的发现,具有重要意义。
The sponge fossils were collected from the sequence of Late Triassic Carnian Hanwang Formation in north—westarn Sichuan Province. Based on the study of more than athousand sponge fossils, the authors recommend a system of taxonomy for the sponge fauna. Most of the fossils belong to Lychniscosa, in which 6 families, including 7 genera and, 12 species are recognized. Besides one genus and one species belong to Lyssacinosa. It is so interesting that only one species of Calcarea is found among the prepared thin sections. The Triassic has long been called a gap of the evolution of sponges. The discovery of Carnian Lychniscosa and others are of great importance.
关键词
海绵纲
海绵化石
多孔
动物门
sponge
Lychniscosa
Late Triassic
Sichuan province
Hunwang formation.
