贵州关岭扒子场中三叠世绒枝藻植物群的发现

MIDDLE TRIASSIC DASYCLADACEAE FROM BAZICHANG OF GUANLING, GUIZHOU PROVINCE

本文系统地描述了采自贵州关岭扒子场中三叠世坡段组、垄头组和竹杆坡组绒枝藻6属7种的特征及其层序。该绒枝藻植物群可分为3个生物带和3个亚带,即(1)Salpingoporellabazichangia生物带:①Teutloporella cf.triasina亚带,②Briarocladella polyporella亚带,③Strongylotubulla rectoid亚带;(2)Brachyteporella yinchacladia生物带;(3)Brachyteporellabrachycladia生物带。

A dasycladacean florula, consisting of 7 species belonging 6 genera, found from the Poduan Formation, Longtou Formation and Zhuganpo Formation, is described in the paper. The florula can be divided into 3 biozones and 3 subzones. The sequence of these zonations is listed ascendingly as follows : (1) Salpingoporella bazichangia biozone, preserved in upper part of Poduan Formation, Upper Anisic: ① Teutloporella cf. triasina Sub-zone; ② Briarocladella polyporella Subzone; ③ Strongylotubulla rectoid subzone. (2) Brachyteporella yinchacladia biozone, occurring at the bottom and top parts of Longtou Formation, Lower Ladinic. (3) Brachyteporella brachycladia biozone, only found in Zhuganpo Formation, Upper Latinic.