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三稜龍屬

三棱龙属
化石时期:卡尼阶至诺利阶
三稜龍的骨架模型
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 爬行綱 Reptilia
目: 三棱龙目 Trilophosauria
科: 三棱龙科 Trilophosauridae
属: 三棱龙属 Trilophosaurus
Case, 1928
模式種
Trilophosaurus buettneri
Case, 1928
  • T. buettneri Case, 1928
  • T. jacobsi Murry, 1987
  • T. dornorum
    Mueller and Parker, 2006
異名
  • Chinleogomphius
    Sues and Olsen, 1993

三稜龍屬學名Trilophosaurus)是種已滅絕雙孔亞綱爬行動物,生存於三疊紀晚期,外表類似蜥蜴,跟主龍類有接近親緣關係。三稜龍是種草食性動物,身長可達2.5公尺。頭骨短而厚重,有寬廣平坦的頰齒,表面銳利,可切斷堅硬的植物。前上頜骨與下頜前部缺乏牙齒,牠們生前可能有角質覆蓋的喙狀嘴。

三稜龍的复原圖
三稜龍的骨架模型

三稜龍的頭骨也很獨特,因為牠們的下顳孔消失了,使牠們看起來像是闊孔類爬行動物的頭骨,所以三稜龍類最初跟楯齒龍目鰭龍超目一起被歸類於闊孔亞綱。在1988年,Robert L. Carroll提出下顳孔消失是為了使頭骨強化。

到目前為止,三稜龍的化石發現於北美歐洲的晚三疊紀地層。

參考資料

  • Michael J. Benton (2000), Vertebrate Paleontology, 2nd ed. Blackwell Science Ltd, p.144
  • Robert L. Carroll (1988), Vertebrate Paleontology and Evolution, W.H. Freeman & Co. p.266

外部連結


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三稜龍屬
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