摘要
本文记述了一个采自宁夏同心丁家二沟的同心铲齿象幼年头骨。通过与PL.danovi.Pl.grangeri比较,进一步证明了Pl.tongxinensis的进化水平介于二者之间,并与后者的关系更为密切。笔者选择Phiomia和现生Elephas maximus为参照分析了同心头骨的进化特征。尽管三者不属于同一枝系,但表现在它们身上的性状变化仍可大体反映出长鼻类的进化趋向。
Ye Jie and Jia Hang reported the occurrence of the genus Platybelodon in the Tongxin area
in 1986.The species name was taken from Chen,who erected a new species of Gomphothe-
■um,G.tongxinensis,from the same region.The materials Ye and Jia described then were,
unfortunately,mainly isolated teeth and,in a better case,incomplete tooth rows.Since then
more specimens have been collected,among which there is a juvenile skull in assosiation with
i■s lower jaw,V 8503.This enables the authors of the present paper to ascertain some skull
features of that special kind of proboscidean and to discuss its phylogenetic position based on
skull morphology.
出处
《古脊椎动物学报》
CSCD
北大核心
1989年第4期284-300,317-318,共17页
Vertebrata Palasiatica
关键词
铲齿象
头骨
宁夏同心
Tongxin
Ningxia
Middle Miocene
Platybelodon
Skull
