Abstract: The fossil fishes described here were collected from the Upper Shaximiao Formation of Zizhong, Sichuan, and are referred to a new genus and species, Tianfuichthys spinodorsalis, of the Semionotidae. Tianfuichthys resembles Semionotus in many respects, and Neolepidotes in some respects. It is characterized by extraordinarily spine-shaped dorsal ridge-scales, large parietals, few suborbitals, lacking fringing fulcra, and distinguished from all the known genera in the family. By Tianfuichthys and known fossil fishes, the age of the fish-bearing beds is probably Middle Jurassic. This new discovery is of great signific ance to the study of the biostratigraphy in Sichuan Basin.

摘要： 本文记述的棘背天府鱼(新属新种)发现于四川资中沙溪庙组。它具有大的顶骨、少的次眶骨及无饰缘棘鳞等特征，与新鳞齿鱼(Neoleidotes)相似;另外具有很发达的棘状背嵴鳞、少的次眶骨及鳞片无杵臼式关节等特征，与半椎鱼(Semionotus)很相似。天府鱼以其长大的顶骨、较居后的颌关节、较短的眶前距、很发达的棘状背嵴鳞及无饰缘棘鳞等特征，有别于半椎鱼科中所有已知属。根据天府鱼和过去记述的鱼化石，仍认为含鱼层的时代可能为中侏罗世。