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古鱷亞目

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古鱷亞目(Proterosuchia)是槽齒目的一個亞目,是其中最原始且為祖先的物種。牠們是原始的主龍類,外型稍微類似鱷魚,大多數生存於早三疊紀

在1906,羅伯特·布魯姆(Robert Broom)建立起古鱷亞目名稱。在較晚的分類裡,包括古鱷科引鱷科原鱷龍科

親緣分支分類法之中,這是個並系群分類,而非自然演化支,這名稱不再使用,但還是可以在許多分類書中見到,包括Robert Carroll的《Vertebrate Paleontology and Evolution》。

在最近的古生物研究中,古鱷亞目構成基礎主龍形類;也就是說,牠們屬於主龍形類,但不是主龍類的物種。

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古鱷亞目
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