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地质通报  2003 

贵州晚三叠世关岭生物群大型鱼龙化石一新属种

, PP. 228-235

Keywords: 关岭生物群晚三叠世小凹组鱼龙类贵州

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Abstract:

根据采自贵州关岭上三叠统小凹组下段两个分别具有完整骨架和呈立体保存的头骨标本,命名和描述为一种大型的长体型的鱼龙Panjiangsaurusepicharisgen.etsp.nov.。这类鱼龙以下颌后部缺齿,荐前椎数约69节,前肢边缘的凹口出现在桡骨、接桡骨和远端腕骨上为特征。Panjiangsaurus外鼻孔的骨片组成与中、晚三叠世Shastasaurus和Cymbaspondylus的外鼻孔相似,肩带和腰带也具有晚三叠世卡尼期Shonisaurus的肩带和腰带的特点,但其挠骨、接桡骨和远端腕骨均发育有凹槽的前肢,可以与晚三叠世诺利期Macgonwani以及早株罗世Stenopterygius的前肢相比较,而具有株罗纪鱼龙的特征。

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