摘要
记述了辽宁北票四合屯炒米甸子组中一新翼龙化石，该翼龙个体极小，两翼展开仅约４０ｃｍ。化石具有同形齿、长尾、极短的翼掌骨和非常发育的后肢第Ⅴ趾等特征，因而无疑可归入喙嘴龙亚目喙嘴龙科（Ｒｈａｍｐｈｏｒｈｙｎｃｈｉｄａｅ），并代表一新属种弯齿树翼龙（Ｄｅｎｄｒｏｒｈｙｎｃｈｕｓｃｕｒｖｉｄｅｎ－ｔａｔｕｓｇｅｎ．ｅｔｓｐ．ｎｏｖ．）。该化石是我国及东亚晚侏罗世喙嘴龙类翼龙的首次记录，它的发现有力地表明包括中华龙鸟和孔子鸟在内的辽西四合屯化石层的地质时代应为晚侏罗世。
Dendrorhynchus curvidentatus gen.et sp.nov.,the newly uncovered fossil pterosaur from Sihetun area(Beipiao City,western Liaoning Province) can be placed within the family Rhamphorhynchidae undoubtedly by the homodont teeth,long tail, extremely short wing metacarpal and well developed phalanges of hindlimb digit V. It differs from Dorygnathus, Scaphognathus and Sordes in the first and second wing fingers longer than the radius, from Campylognathoides in the first wing finger longer than the second one. This small flying animal, whose wing span is about 40cm, may be also distinguished from Rhamphorhynchus in its less developed delto pectoral process of humerus, relatively shorter wing fingers and much longer foot digit V. The new genus represents the first record of the Late Jurassic Rhamphorhynchoidea in China and in East Asia. Moreover, the discovery of Dendrorhynchus further indicates the geological age of the Chaomidianzi Formation to be the latest Jurassic, from which abundant fossil vertebrates including Sinosauropteryx and Confuciusornis were also discovered.
出处
《江苏地质》
1998年第4期199-206,共8页
Jiangsu Geology
基金
国家杰出青年科学基金
地质矿产部重点项目
关键词
晚侏罗世
喙嘴龙科
树翼龙
辽宁
化石
地层
Late Jurassic Rhamphorhynchidae Dendrorhynchus gen.nov. Beipiao,Liaoning
