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陆鳄属

陆鳄属
化石时期:晚三叠世
无效状况
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 爬行綱 Reptilia
演化支 真爬行動物 Eureptilia
演化支 卢默龙类 Romeriida
亚纲: 双孔亚纲 Diapsida
演化支 新双弓类 Neodiapsida
演化支 蜥类 Sauria
演化支 主龜龍類 Archelosauria
下纲: 主龍形下綱 Archosauromorpha
演化支 鱷腳類 Crocopoda
演化支 主龍型類 Archosauriformes
演化支 真鱷腳類 Eucrocopoda
演化支 镶嵌踝类 Crurotarsi
演化支 主龍類 Archosauria
演化支 偽鱷類 Pseudosuchia
演化支 鳄类 Suchia
演化支 副鱷形類 Paracrocodylomorpha
演化支 铠鳄类 Loricata
总目: 鱷形超目 Crocodylomorpha
亚目: 喙头鳄亚目 Sphenosuchia
属: 陆鳄属 Terrestrisuchus

陸鱷(屬名:Terrestrisuchus)意為「陸地鱷魚」,是種已滅絕的鱷形超目動物,身長約50公分。化石發現於威爾斯,生存年代為三疊紀晚期

陸鱷是種小型、細長、擁有長腿、類似蜥蜴的動物,外表不類似現代鱷魚,但是鱷魚的遠親。陸鱷可能以非常快的速度移動,偶爾以後肢站起,但在正常狀態下仍是以四足方式行走。陸鱷的四肢形狀、姿勢,顯示牠們可以快速奔跑。牠們有非常長的尾巴,相當於頭部到身體的兩倍。當陸鱷以後肢快速奔跑時,尾巴可能具有平衡重心的功能[1]

陸鱷的四肢直立於身體之下,顯示最原始鱷形類是善奔動物。現代鱷魚偶爾可高速奔跑,以兩隻前肢、兩個後肢作出前後擺動作,以達到迅速移動。化石顯示陸鱷是趾行動物,以腳趾支撐重量行走。某些古生物學家提出,陸鱷可能是跳鱷的未成年體[2]

參考資料

[编辑]
  1. ^ Palmer, D. (编). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. 1999: 98. ISBN 1-84028-152-9. 
  2. ^ Allen, D. When Terrestrisuchus gracilis reaches puberty it becomes Saltoposuchus connectens!. Journal of Vertebrate Paleontology. 2003, 23 (3): 29A. 
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陆鳄属
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