节点文献
记甘肃灵台晚上新世-早更新世地层中的无根鼢鼠
Rootless myospalacines from Upper Pliocene to Lower Pleistocene of Wenwanggou section, Lingtai, Gansu
【摘要】 记述了3属、6种采自甘肃灵台文王沟上新统-更新统剖面中的臼齿无根鼢鼠,包括凸枕型的Eospalax simplicidens sp.nov.,E.lingtaiensis sp.nov.,Allosiphneus teilhardi Kretzoi,1961和A.arvicolinus(Nehring,1883);凹枕型的Yangia omegodon(Teilhard de Chardin&Young,1931)和Y.chaoyatseni(Teilhard de Chardin&Young,1931)。对其中的新种做了详细描述,对其他属、种也进行了修订。古地磁测年表明,Eospalax,Allosiphneus和Yangia属的最早记录都在晚上新世,突破了早更新世的最早记录。Eospalax和Allosiphneus属都起源于臼齿有根、凸枕型、m1前端能演化成无珐琅质层的鼢鼠;这种鼢鼠可能是上新世初期一种较原始的Pliosiphneus。Yangia属可能起源于臼齿有根、凹枕型并且m1前端有珐琅质层的一种Mesosiphneus,即最原始的Y.omegodon在上新世晚期从最进步的M.intermedius(=M.paratingi)中分化出来。
【Abstract】 Rich rootless-molar myospalacines fossils from the Wenwanggou section, Lingtai, Gansu, were reported as Eospalax, Allosiphneus and Yangia by Zheng and Zhang in 2000 and 2001. Herein, we describe them in detail, and discuss their evolutions and originations. Both dental terminology and measurement are shown in Fig. 1.
【Key words】 Lingtai,Gansu; Upper Pliocene-Lower Pleistocene; rootless myospalacines; evolution;
- 【文献出处】 古脊椎动物学报 ,Vertebrata Palasiatica , 编辑部邮箱 ,2014年04期
- 【分类号】Q915.873
- 【被引频次】1
- 【下载频次】81