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古脊椎动物学报 ›› 1999, Vol. 37 ›› Issue (04): 257-266.

• 古脊椎动物学报 • 上一篇    下一篇

记陕北子长晚三叠世一新的古鳕类

苏德造   

  • 出版日期:1999-12-15 发布日期:1999-12-15

A NEW PALAEOMSCOID FISH FROM THE UPPER TRIASSIC OF ZICHANG, NORTHERN SHAANXI

SU De-Zao   

  • Published:1999-12-15 Online:1999-12-15

摘要: 记述了陕北子长晚三叠世古鳕科(Palaeoniscidae)一新属新种——子长瓦窑堡鳕(Wayaobulepis zichangensis gen. et sp. nov. )。其一般形态特征如身体长纺锤形、背鳍基长,后部对着腹鳍和臀鳍之间的空隙、鳍条粗壮、饰缘棘鳞细小、悬挂骨倾斜、鳃盖骨很高大、鳞片小及横列鳞数目多等,与澳大利亚中至晚三叠世的Myriolepis很相似,但新属具有吻较尖、背鳍鳍条数目较少、鳞片具有众多的斜嵴、后缘成梳齿状以及具有背嵴鳞等显著特征区别于Myriolepis。瓦窑堡鳕在体形、

Abstract: The fossil fish described here was collected from Zichang County, Northern Shaanxi, and is referred to a new genus and species, Wayaobulepis zichangensis, of the Palaeoniscidae. Wayaobulepis resembles Myriolepis in many respects, but is characterised by its obtusely acute snout, few fin-rays of the dorsal fin, numerous oblique ridges covered with enameloid on scales, and strong dorsal ridge-scales. By nature of Wayaobulepis and stratigraphic sequence, the age of the fish-bearing beds should be Late Triassic.