摘要
本文详细记述了陕西府谷下三叠统和尚沟组中发现的一前棱蜥类骨架。依据头骨及头后骨骼特征订立一新属种:河套五角蜥(Pentaedrusaurus ordosianus gen.et.sp.nov.)。讨论中,对原归入前棱蜥科的袁氏三台龙(Santaisaurus yuani)的系统分类位置提出了修正意见,同时建议取消黄河保德蜥(Paoteodon huanghoensis)这一名称。
In the present paper a new procolophonid,Pentaedrusaurus ordosianus gen.et sp.nov.is
erected on the basis of an incomplete skeleton.Pentaedrusaurus,following the Neoprocolo-
phon and Eumetabolodon,is the third genus of procolophonid found in China,since Santaisau-
rus yuani is here considered as an early lizard and Paoteodon huanghoensis as nomen dubium.
The material described was collected from Lower Triassic,the upper part of Heshanggou
Formation of Fugu County,Shaanxi,the same horizon and region as that of Eumetabolodon
bathycephalus.
Besides chelonians,small sized procolophonids are the only representives of Anapsida sur-
vived in Late Triassic.For a long time,Procolophonidae was assigned to Anapsida Cotylosau-
ria.Since Cotylosauria has been used to include both amphibians and reptiles,and the phy-
logenetic position of Diadectidae,based on which Cotylosauria was erected,is still uncertain,
there is much discussion on the meaning of this order.Heaton(1980)indicated that Cotylo-
sauria was a member of the amphibian subclass Batrachosauria,and including Seymoriamor-
pha and Diadectomorpha only.Carroll(1987)brought up a new proposal that Anapsida Ca-
ptorhinida,instead of Anapsida Cotylosauria,contains the suborder Captorhinia,Procolopho-
nia and Pareiasauria——the most primitive amniontes.
出处
《古脊椎动物学报》
CSCD
北大核心
1989年第4期248-267,313-314,共20页
Vertebrata Palasiatica
关键词
前棱蜥科
下三叠统
陕西府谷
Fugu
shaanxi
Heshanggou Formation
Procolophonidae
