塊椎類(Rhachitomi)是一類離片椎目兩棲動物,得名於其尚未癒合的間椎體與側椎體,包括大部分的離片椎目動物,如雙頂螈科(Dissorophidae),引螈科(Eryopidae),先驅螈科(Archegosauridae)等,以及全椎類和現存的滑體亞綱(青蛙,蠑螈等) 下圖為該演化支下級分類:
離片椎類 |
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