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竊螺龍屬

窃螺龙属
化石时期:上白堊紀70–66 Ma
竊螺龍全身骨架
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: 偷蛋龍科 Oviraptoridae
亚科: 河源龙亚科 Heyunanniinae
属: 窃螺龙属 Conchoraptor
Barsbold, 1986
模式種
纖弱竊螺龍
Conchoraptor gracilis

Barsbold, 1986

竊螺龍屬學名Conchoraptor)是偷蛋龍科的一恐龍,生存於上白堊紀亞洲。牠們的屬名意為「海螺偷竊者」,反映了竊蛋龍科並非以蛋為食,而有可能是專門吃軟體動物的假說[1]

敘述

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竊螺龍的頭顱骨(亞伯達大學藏)

竊螺龍是種小型恐龍,身長約1到2公尺[1]。不像其他偷蛋龍科,竊螺龍沒有頭冠。但竊螺龍缺乏牙齒,這是典型的偷蛋龍類特徵[1]。偷蛋龍類雖然沒有牙齒,但具有堅硬的喙狀嘴,被認為適合咬碎軟體動物的外殼[1]。竊螺龍的頭顱骨有許多洞孔、中空空間[2]。耳部區域的骨頭連接處,被認為是共鳴腔,可協助聽覺[3]

發現與命名

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在1971年,一群波蘭蒙古的聯合挖掘團隊在蒙古的耐梅蓋特組(Nemegt Formation)發現這些化石,地質年代為坎潘階晚期[1]。最初科學家認為竊螺龍是偷蛋龍的幼年個體,因此缺乏頭冠,而在性成熟的過程中,會長出頭冠[1]。但更多的研究顯示竊螺龍與偷蛋龍的手部結構不同,所以認為是一個獨立的屬[1]。在解剖學上,竊螺龍的演化位置似乎是介於雌駝龍及偷蛋龍之間,這使得學界更難研究竊螺龍的分類位置[1]

模式種纖弱竊螺龍C. gracilis),是由瑞欽·巴思缽(Rinchen Barsbold)在1986年所描述、命名[1]。屬名在古希臘文意為「貝殼的盜賊」[4],因為瑞欽·巴思缽認為偷蛋龍類是以軟體動物為食,而非傳統理論所認為的以蛋為食[1];種名在拉丁文意為「纖細的」。正模標本(編號IGM 100/20)是一個部分身體骨骼、頭顱骨。之後發現約20個標本,被編入於竊螺龍。

在1986年,瑞欽·巴思缽將竊螺龍歸類於偷蛋龍科。近年研究顯示牠們屬於偷蛋龍科的雌駝龍亞科

參考文獻

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  1. ^ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Conchoraptor." In: Dodson, Peter & Britt, Brooks & Carpenter, Kenneth & Forster, Catherine A. & Gillette, David D. & Norell, Mark A. & Olshevsky, George & Parrish, J. Michael & Weishampel, David B. The Age of Dinosaurs. Publications International, LTD. p. 136. ISBN 0-7853-0443-6.
  2. ^ Kundrat, M. 2007, "Avian-like attributes of a virtual brain model of the oviraptorid theropod Conchoraptor gracilis", Naturwissenschaften 94: 499-504
  3. ^ Kundrat M. and Janacek, J., 2007, "Cranial pneumatization and auditory perceptions of the oviraptorid dinosaur Conchoraptor gracilis (Theropoda, Maniraptora) from the Late Cretaceous of Mongolia", Naturwissenschaften 94:769–778
  4. ^ Rinchen Barsbold, 1986, "Raubdinosaurier Oviraptoren". In: Vorobyeva, E. I. (ed.), Herpetologische Untersuchungen in der Mongolischen Volksrepublik. Akademia Nauk SSSR. pp. 210-223
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竊螺龍屬
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