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小馳龍屬

小驰龙属
化石时期:白堊紀晚期72 Ma
无效状况
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 蜥形纲 Sauropsida
总目: 恐龍總目 Dinosauria
目: 蜥臀目 Saurischia
亚目: 獸腳亞目 Theropoda
科: 阿尔瓦雷斯龙科 Alvarezsauridae
亚科: 小驰龙亚科 Parvicursorinae
属: 小驰龙属 Parvicursor
Karhu & Rautian, 1996
模式種
遙遠小馳龍
Parvicursor remotus

Karhu & Rautian, 1996

小馳龍屬(屬名:Parvicursor)意為「小型奔跑者」,是種迷你阿瓦拉慈龍科恐龍,生存於晚白堊紀。小馳龍擁有修長腿部,可快速奔跑。成年體從口鼻部到尾巴末端,全長只有39公分,重量為162公克,是目前體型最小的非鳥類的恐龍之一[1]

小馳龍(紅)與人類的體型比較圖

如同其他阿瓦拉慈龍科恐龍,小馳龍的前肢短而粗胖,手掌已退化成只有一個大型指爪,可能用來挖開堅硬的白蟻塚或挖掘其他東西。這些指爪不太可能用來防衛,因為這些指爪太短,且無法做靈活的動作;小馳龍可能就如同屬名所顯示的,是個快速奔跑的動物。

小馳龍的化石發現於蒙古胡山地區的西戈約特層。目前僅發現一個不完整的標本,包含大部分骨盆與後肢。小馳龍的近親包含:阿瓦拉慈龍巴塔哥尼亞爪龍單爪龍,而他們的最近親是最近剛發現的鳥面龍

在2002年,Shigeru Suzuki等人發現兩個小型阿瓦拉慈龍類的化石。他們認為這兩個化石是鳥面龍的幼年個體化石[2]。在2008年,尼克·朗里奇(Nick Longrich)與菲力·柯爾(Phil Currie)根據這兩個化石的癒合腕骨、骨盆特徵,提出牠們其實是小型阿瓦拉慈龍類的成年個體化石。他們同時提出阿瓦拉慈龍科的系統發生學研究,發現這兩個化石是小馳龍的近親,因此將這兩個標本暫時標名為Parvicursor sp.[3]

臨河爪龍被認為可能是小馳龍的次異名[4]

參考資料

[编辑]
  1. ^ Mortimer, M. (2004), "The Theropod Database" 互联网档案馆存檔,存档日期2008-01-09., viewed September 17, 2007. 存档副本. [2008-01-23]. (原始内容存档于2008-01-09). .
  2. ^ Suzuki, S., Chiappe, L.M., Dyke, G.J., Watabe, M., Barsbold, R., Tsogtbaatar, K. (2002). "A new specimen of Shuvuuia deserti Chiappe, et al. 1998 from the Mongolian Late Cretaceous with a discussion of the relationships of alvarezsaurids to other theropod dinosaurs." Contributions in Science, Natural History Museum of Los Angeles County, 494: 1–18.
  3. ^ Longrich, Nicholas R.; and Currie, Philip J. Albertonykus borealis, a new alvarezsaur (Dinosauria: Theropoda) from the Early Maastrichtian of Alberta, Canada: Implications for the systematics and ecology of the Alvarezsauridae. Cretaceous Research. 2008,. online preprint. doi:10.1016/j.cretres.2008.07.005. 
  4. ^ Dyke, G. J.; Naish, D. (2011). "What about European alvarezsauroids?". Proceedings of the National Academy of Sciences 108 (22): E147
  • Karhu, A.A. and Rautian, A.S. (1996). "A new family of Maniraptora (Dinosauria: Saurischia) from the Late Cretaceous of Mongolia". Paleontological Journal Russian Academy of Sciences 30(5): 583-592.

外部連結

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小馳龍屬
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