小塔塔鼠

小塔塔鼠是產於內蒙古自治區鄂爾多斯市杭錦旗三盛公的早漸新世（E₃）晚期的化石。

基本介紹

• 中文名：小塔塔鼠
• 外文名：Tataromys minor Huang,1985
• 形成時代：早漸新世（E3）晚期
• 產地：鄂爾多斯市杭錦旗三盛公
• 分類：化石

特性描述

small and primitive tataromys; sphenopalatine foramen located above m1; lower jaw slender; cheek teeth brachydont, with distinct main cusps and low, narrow lophs; anterior cingulum usually absent on p4, usually isolated and with prominent anterocone on upper molar; on p4 posterior arm of paracone usually free and extends relatively posteriorly; on m1 and m2 mesosinus widely v-shaped, metaloph very low, thinning lingually and directed to posterior arm of protocone, protocone acute v-shape, sinus deep, oblique posterobuccally and often connected with posterosinus; on m3 metaloph free of bending posteriorly to join with posteroloph or hypocone, posterocone and posterior groove prominent; on lower molars arm of entoconid low, slender, oblique, and arm of hypoconulid low.。

化石產地

該化石產地為鄂爾多斯市杭錦旗三盛公。