摘要
飞鹰四笔石Tetragraptus aquilinus n.sp.首先发现于浙江衢县下奥陶统宁国组反常对笔石(Didymograptus abnormis)带,以后在广西兴安及贵州三都等地又有发现。许杰教授和作者在研究浙江四笔石的时候,将它建立为新种,并进行了详细地描述。
Tetragraptus aquilinus sp.nov.was erected on the specimens collected by the writer from the Didymograptus abnormis zone of the Lower Ordovician Ningkou Shale in Quxian,Zhejiang.The rhabdosome is very large and consists of four conspicuous reflexed stipes each measuring more than 110mm in length.The stipes are narrow at proximal ends,with a width of about 3 ram,but widen gradually to a maximum width of 6 mm at the distal parts.At the proximal end of the stipe,the thecae measure 3 mm in length and 0.8-1 mm in width,whereas in the distal portion they measure 7 mm in length and 1-1.2mm in width.Proximally there are 11-8 thecae in a space of 10 mm,but distally 5 in the same space.
出处
《地质学报》
1978年第1期22-24,84,共4页
Acta Geologica Sinica
