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继 1 990年王伴月和李春田记述了发现在吉林桦甸中始新世的争胜鼠 (Zelomys)之后 ,近年又在山西垣曲、河南卢氏、江苏溧阳等地的中始新世到晚始新世 (Irdinmanhan lateShara murunianorErgilian)的 5个地点中陆续发现了一些与争胜鼠相近的新材料。经研究后 ,将所有材料归诸于创建的一新科 :争胜鼠科 (Zelomyidaefam .nov .)。它包括了争胜鼠及本文新记述的安氏鼠 (Andersomysgen.nov.)、耗子 (Haozigen .nov .)和苏鼠 (Suomysgen .nov.)共 4属 6种。新科的特征是 :始啮型头骨 -松鼠型下颌 ;门齿釉质层散系 ;颊齿具有发育的次尖和下次脊 ,后期种类上颊齿的外侧齿尖的唇侧发展成平凹到新月形。新科的系统关系不很清楚 ,尽管与始鼠科 (Eomyidae)有某些相似之处 ,但它更可能是独立发展的一个支系。争胜鼠属化石分布较广 ,在我国吉林、江苏和山西的中、晚始新世地层中都有发现 ,它的特征是下颊齿p4 m2宽度逐渐增大 ,p4 m3具下前边尖 ,并与短的下原尖前臂相接。属中除属型种———东方争胜鼠 (Z .orientalisWangetLi)外 ,还建立了一个约翰争胜鼠新种 (Z .joannessp .nov.) ,一约翰争胜鼠相似种 (Z .cf.Z .joannes)。同时认为Z .gracilisWangetLi,1 990是Z .orientalis的同物异名。约翰种与属型种的区别在于个?
Following the records of Zelomys (Eocene Zelomys) discovered in Wangdean and Li Chuntian in Jilin in1990, the recent Eocene epoch in Shanxi Yuanqu, Henan Lushi and Jiangsu Liyang In the late eocene (Irdinmanhan lateShara murunianorErgilian) 5 spots in succession to discover some similar materials and competing rat new material. After research, all the materials were assigned to a new section created: Zelomyidaefam .nov. It includes 6 species of 4 genera and 4 species of Andersomysgen.nov., Haozigen .nov. And Suomysgen. Nov. The characteristics of the new section are: the initial type of skull - squirrel-type mandibular; incisor enamel layer system; cheek teeth with the development of the next tip and the next ridge, the late species of the outer side of the cheek teeth, shape. The new system’s phylogenetic relationship is not well understood and although it has some similarities with Eomyidae, it is more likely to be an independently developed branch. Fusulin rats fossils are widely distributed in China, Jilin and Jiangsu, middle and late Eocene strata have found that it is characterized by the lower teeth p4 m2 width gradually increased, p4 m3 with a lower anterior tip, and With a short lower extremity forearm phase. In addition to genus species is the genus --- Orient Syria rat (Z. orientalisWangetLi), but also established a new species of John competing rats (Z.joannessp .nov.), A similar species of John competing rats (Z.cf.Z. joannes). At the same time, Z. gracilisWangetLi, 1 990 is synonymous with Z.orientalis. John species and genus difference is that?