摘要
记述了新疆北部赛里木湖北汗吉尕山西部志留纪amorphognathoides带下部牙形类9属12种,这是继云南、西藏和四川后,在新疆的首次发现.amorphognathoides带下部的牙形类以具有齿台脊的器官属Pterospathodus Pa分子的P. amorphognathoides和P.celloni/P. pennatus pennatus的共存为特征,地质时代仅限于志留纪Llandovery世的最晚期(即Telychian晚期).amorphognathoides带的牙形类几乎全球分布,该带下部的牙形类完全可以同国内外同期的牙形动物群对比,它们普遍生活在台地相浅水区中较深水的环境(如滞流盆地)中,营游泳-底栖生活方式.
Occurrences of Silurian conodonts in the amorphognathoides Zone in Chinese territory are poorly known so far. Only four cases concentrated in West China as shown in Text-fig. I have been recorded or described by other authors (Zhou et al. 1977, 1981, 1989; Wang and Wang, 1981; Ni et al., 1982; Lin, 1983; Yu, 1985; Qiu, 1985, 1988; An, 1987; Rao et al., 1989). However, it is worth notice that the stratigraphic units——the Shangrenheqiao, Kedecun and Zalongemar Formations, mainly containing the conodonts Pterospathodus amorphognathoides (Pa element), P. pennatus procerus (Pa element) were inappropriately placed in the Wenlock Series with insufficient evidence, and that the Shimenkan Formation mainly yielding the conodonts P. celloni (Pa element), P. pennatus procerus (Pa element) and P. amorphognathoides (Pb element) was mistakenly assigned to the celloni Zone.
出处
《古生物学报》
CAS
CSCD
北大核心
1993年第2期196-217,277-280,共22页
Acta Palaeontologica Sinica
基金
国家305项目<加速查明新疆矿产资源的地质
地球物理
地球化学综合研究>的子课题(V_(10-3))<新疆北部石炭系及其含矿性研究>的资助
关键词
新疆
牙形类
志留纪
Xinjiang
amorphognathoides Zone
Llandovery-Wenlock boundary
