在1986年,James A. Hopson與Herbert Barghusen將巴莫鱷科與Ictidorhinidae科(當時含Hipposauridae科與Rubidginidae科)合稱巴莫鱷亞目,但不確定牠們到底是個自然演化支,還是因擁有相同特徵的集合體。他們認為漸衰鱷因研究太少而無法歸類,但認為始巨鱷是較進化的物種。
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