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广东南雄盆地古新世细齿兽科化石

1978年 第16卷 第2期: 91~96

发表日期:2009-04-30李志恒来源:放大 缩小

编辑:王伴月

摘要: Described in this paper are two new miacid species known in the upper part of Shanghu Formation (L.-M. Paleocene) near the Village Jintang, Nanhsiung County, Kwangtung in 1973.  So far miacids of Paleocene age were mainly known from North America, and very rare in Eurasia.  In Asia the group is represented by only a single genus and species Pappictidops orientalis (Chiu et Li, 1977) from Anhui.
    Pappictidops acies (sp.nov.), represented by upper and lower jaws of same individual, similar to P. orintalis, but smaller in size and much slender, premolars slender and elongate, with higher and compressed paracone, protocone of P4 with a sharp V-shaped crest, and P4 with crested talonid. Upper molars with a transverse crest at the base of the inner wall of metacone. In M1, paracone and metacone angular and connate, centrocrista  and metacrista sharp, protocone forming an acute V-shaped crest, protoconule and posteingulum present. M2 less reduced. Lower molars trigolid very high, and much so than talonid.
    P. obtusus (sp. nov.) is represented by a broken skull with left C, M1 and M2. Although it is close to P. orientalis in size and robustness, yet similar to P. acies in the structures of the upper molars. Upper molars very wide and short, with either transverse crest or cuspule at the base of the inner wall of the metacone. In M1, paracone and metaeone obtuse, metacrista blunt, protocone with roundish V-shaped crest, post-cingulum distinctly developed and protoconule present.

卷期:16卷 02期

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