摘要
本文描述了采自山西榆社盆地上第三系竹鼠类化石的一新种。新种与Rhizomys(Brachyrhizomyr)rhanriur相似,但个体较小,臼齿相对狭长,M,保留有连接下次尖和下次脊的齿襞(mure)及短的下中脊。这两种化石竹鼠在榆社的出现,超越了现生竹鼠类分布的北界,说明该科的情况要比以前知道的更为复杂,也表明榆社地区在晚第三纪时比近代湿润。
A new species of rhizomyid rodent is described from late Neogene deposits of Yushe Basin, Shanxi Province. It resembles Rhizomys (Brachyrhizomys) shansius, but differs in its smaller and proportionally narrower molars, and retention of a inure and short mcsolophid on M_3. That two bamboo rats occurred in the late Neogene of this region, beyond the northern limit of present distribution for the family, indicates greater diversity than previously known and moister conditions than at present.
出处
《古脊椎动物学报》
CSCD
北大核心
1993年第2期95-101,共7页
Vertebrata Palasiatica
关键词
山西榆杜
晚第三纪
竹鼠科
新种
Rhizomyidae
new species
late Neogene
Yushe Basin
