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Vertebrata Palasiatica ›› 2012, Vol. 50 ›› Issue (1): 53-73.

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A NEW SPECIES OF CHALICOTHERIINAE (PERISSODACTYLA, MAMMALIA) FROM THE LATE MIOCENE IN THE LINXIA BASIN OF GANSU, CHINA

CHEN Shao-Kun, DENG Tao, HE Wen, CHEN Shan-Qin   

  • Online:2012-03-15 Published:2012-03-15

临夏盆地晚中新世爪兽亚科(奇蹄目,哺乳纲)一新种

陈少坤,邓涛,何文,陈善勤   

Abstract: Chalicothere fossils are rare in Chinese Neogene deposits.A new chalicothere species from the Linxia Basin of Gansu Province, Nestoritherium linxiaense sp. nov., is described and studied here. This species represents the most primitive Nestoritherium known. Based on this new species, the generic name Nestoritherium is revalidated and the species N. wuduense(Xue and Coombs,1985) is referred to this genus. Hesperotherium is nested within Nestoritherium.

摘要: 爪兽在我国新近纪地层中发现的数量和种类都相当稀少。本文根据产自甘肃省临夏盆地晚中新世柳树组的一批化石材料建立的一个爪兽化石新种临夏奈王爪兽(Nestoritherium linxiaense sp. nov.)是此属目前所发现的最原始的种类。新种以鼻骨与泪骨相接触、上臼齿原小尖萎缩、原脊不太发育、下颌粗壮、齿隙短、下犬齿可能存在但发育较弱以及p4下内尖孤立而区别于其他各种。根据新发现的化石,确立了Nestoritherium属名的有效性,并将修订后的Nestoritherium wuduense(Xue & Coombs, 1985)归入其中,认为此属是Hesperotherium的祖先类型。