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三稜齒獸科

三棱齿兽科
化石时期:228–161 Ma
三疊紀晚期到侏儸紀中期
Pachygenelus的想像圖
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 合弓綱 Synapsida
演化支 獸孔類 Therapsida
演化支 犬齒獸類 Cynodontia
演化支 外犬齿兽类 Epicynodontia
演化支 真犬齒獸類 Eucynodontia
科: 三棱齿兽科 Tritheledontidae
Broom, 1912

三稜齒獸科(學名:Tritheledontidae)也被稱為鼬龍類(Ictidosauria),是群小到中型的犬齒獸類,身長約10到20公分[1]

在1912年,南非古生物學家羅伯特·布魯姆(Robert Broom)建立三稜齒獸科[2]。在某些文獻中,曾被誤拼為「Trithelodontidae」。

三稜齒獸科是極度類似哺乳類且高度特化的犬齒獸類動物,但是牠們的生理結構上仍保留許多爬行動物的特徵。三稜齒獸科是從基礎真犬齒獸類動物演化而來,像是犬頜獸。三稜齒獸科主要是肉食性食蟲性,雖然有些物種已經發展出雜食性的特徵。三稜齒獸科的化石顯示出牠們與哺乳類有接近親緣關係。三稜齒獸類是存活最久的非哺乳類獸孔目之一,從晚三疊紀存活到中侏儸紀。目前不清楚為何這群動物在侏儸紀滅絕。一個可能的解釋是牠們與其近親哺乳類的競爭失敗。大多數侏儸紀的哺乳類是肉食性動物,而且可能會捕食三稜齒獸類。一群稱為三尖齒獸目(Triconodonta)的肉食性哺乳類,首次出現在晚侏儸紀,牠們可能獵食任何小型動物,包括深處危險的三稜齒獸類。三稜齒獸科的化石發現於南美南非,顯示出牠們存活在盤古大陸南部。

種系發生學 & 屬

參考資料

  1. ^ Family Trithelodontidae. [December 31, 2008]. (原始内容存档于2010-04-17). 
  2. ^ Broom, R. On a new type of cynodont from the Stormberg. Annals of the South African Museum. 1912, 7: 334–336. 

外部連結

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三稜齒獸科
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