文内描述中三叠世安尼阶(Anisian)珊瑚化石分别采自桂西田阳板纳组和黔南贵阳青岩青岩组。板纳组珊瑚群中建立Pentasmilia guangxiensisgen.etsp.nov.,该新属种有5条第一周期原生隔片甚至有5条第二周期后生隔片,以此不同于有6条第一周期原生隔片和有6条第二周期后生隔片的石珊瑚类(scleractinians)的珊瑚。产于板纳组的另一新属种Radiophyllia astylatusgen.etsp.nov.,其隔片的排列格式与前人归纳的隔片周期插入示意图甚似,但它却发生在中生代最早期(Anisian)珊瑚的骸体内。文中还对青岩组的Pamiroseris silesiaca作了重新描述。

Middle Triassic ( Anisian ) corals dealt with in the present paper were collected from the Banna Formation ( Tianyang, W. Guangxi ) and the Qingyan Formation ( Qingyan, S. Guizhou ) respectively. In the coral fauna of the Banna Formation, Pentasmilia guangxiensis gen. et sp. nov. is characterized by the corallites with 5 first-cycle protosepta and 5 second-cycle metasepta, accordingly, it is distinct from scleractinians, etc. with 6 first-cycle protosepta and 6 second-cycle metasepta. The pattern of the septal arrangement in Radiophyllia astylatus bears a strong resemblance to one of the sketch maps of the septal cycles painted by some predecessors. It is interesting that the said pattern was discovered actually in the skeleton of the earliest Mesozoic ( Anisian ) corals. In addition, Pamiroseris silesiaca from the Qingyan Formation was described afresh here.

Q915.813.3 P534.51

"论冈瓦纳相地层古生物"项目 , 国家重点基础研究发展计划(973计划)