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地质论评  2005 

辽西义县组发现一新的翼手龙类化石

Keywords: 辽宁白垩世翼手龙类化石牙齿头骨形态

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Abstract:

根据产自中国辽宁省西部早白垩世义县组上部、具有不完整头骨的翼手龙类骨架确立一新属新种:李氏始无齿翼龙Eopteranodonlii(gen.etsp.nov.)。从它窄长的头骨且其上、下颌尖长而没有牙齿,短的颈椎椎体上来看,显示了该翼龙与无齿翼龙类相似。始无齿翼龙的肱骨没有像其他无齿翼龙类那样具有弯曲的肱骨三角嵴,而且几乎所有的无齿翼龙类均个体较大。始无齿翼龙的个体较小,两翼展宽约为1.1m左右。腕骨没有愈合,肱骨三角嵴较平直以及第Ⅳ翼掌骨稍微长于尺骨显示了它的原始性,它代表一新的、较原始的、类似无齿翼龙的翼手龙类。

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