甘肃天祝松山第二和第三地点化石及松山上新世哺乳动物群

本文记述的松山第二(80007)和第三(80008)地点的材料是继作者先前报道的第一(80006)和第二地点后的第三批材料。文中对天祝大唇犀(新种)以及材料稀少的巨斑鬣狗、拉氏印度熊、爪兽等作了较详细的描述。在列出三个地点化石名单(包括5个门类,17科,27属,33种或亚种)的同时,对天祝动物群的地质时代、生态环境也作了扼要讨论。

SOME PLIOCENE MAMMALIAN FOSSILS FROM SONGSHAN-2 AND-3 (TIANZHU, GANSU) AND THE SONGSHAN FAUNA

In this paper, some of large-scale mammalian fossils from Locs. 80007 (=Songshan2) and 80908 (=Songshan-3) of Songshan Commune of Tianzhu, Gansu are described and the songshan fauna including the fossils from Loca. 80006 (=Songshan-1) and 80007 reported by me before are listed. The fauna, of which Leptodontomys and Kowalskia are new record in China and Percrocuta (Dinocrocuta) gigantea, Ochotonoides and Paralactage are confirmed in the Hipparion Red Clay for the first time, consists of 33 species (subsp.) belonging to 27 genera(subgen.). There are 3 species (subsp.) of Lagomorphs and 9 species (subsp.) of Rodents in the fauna which is the most abundant in micromammals of the Chinese middle pliocene faunas. The new Species, Chilotherium (Acerorhinus) tianzhuense, is also described here. It differs from another species of the subgenus by its bigger Protocone, longer Protoloph and deeper "vordere Protoconusfurche" on upper cheek-teeth ; a continuosless innercingulum, well-developed Crochet and Crista on upper premolars, a bigger ratio of the length of DP~1—P~4 to M~1—M~3: This fauna is considered in age as equvalent to Turolian of Europe, Hemphillian of North America or Paoteh stage of China.