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副正體龍屬
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副正體龍屬學名Paratypothorax)是堅蜥目的一屬,是在1985年根據鱗甲化石而敘述、命名,曾經被歸類於箭齒龍的一種。

化石發現於德國的Stubensandstein地層下層、以及美國的Dockum組、欽爾組(Chinle Formation),地質年代為諾利階雷蒂亞階[1][2]。在格陵蘭Flemming Fjord地層發現的化石,也被編入於副正體龍,地質年代為諾利階

副正體龍的背部中央有帶狀的寬鱗甲,表面有溝痕、凹處。副正體龍的身體兩側鱗甲呈角狀,往後側向延伸,類似正體龍亞科正體龍。每塊鱗甲的後方有明顯的突出部,與後方鱗甲重疊[3]

目錄

參考文獻

  1. Long, R. A.; and Ballew, K. L. Aetosaur dermal armor from the Late Triassic of southwestern North America, with special reference to material from the Chinle Formation of Petrified Forest National Park. Museum of Northern Arizona Bulletin. 1985, 47: 45–68. 
  2. Hunt, A. P.; and Lucas, S. G. The first occurrence of the aetosaur Paratypothorax andressi (Reptilia:Aetosauria) in the western United States and its biochronological significance. Paläontologische Zëitschrift. 1992, 66: 147–157. 
  3. Heckert, A. B.; and Lucas, S. G. A new aetosaur (Reptilia: Archosauria) from the Upper Triassic of Texas and the phylogeny of aetosaurs. Journal of Vertebrate Paleontology. 1999, 19 (1): 50–68.