【摘要】 <正> 本文描述的皱纹珊瑚标本,是笔者于1975年及1977年采自青海柴达木盆地北缘阿木尼克山早石炭世早期穿山沟组。该组代表柴达木盆地北缘早石炭世最下部一个地层单位,自下而上分为三个岩性段:下部为砂砾岩段;中部为灰岩夹页岩段;上部为灰岩段。描更多还原

【Abstract】 The rugose corals dealt with in this paper were collected from the early Lower Carboniferous Chuanshangou Formation in Amunike Mountain, Qinghai province. Altogether 8 genera and 10 species are described (2 genera and 7 species being new) and they may be divided into two rugose coral assemblages as follows:2. Upper horizon: Enygmophyllum-Kakwiphyllum qinghaiense assemblage, including: Enygmophyllum dubium Gorsky, Calmiussiphyllum intermedium Z. J. Wang (sp. nov.), Humboldtia qinghaiensis Z. J. Wang (sp. nov.), Kakwiphyllum sinense Z.J. Wang (sp. nov.) Kakwiphyllum qinghaiense Z.J. Wang (sp. nov.), DonophyUum primiticum Z. J. Wang (sp. nov.), Amplexus sp., Lophophyllum sp.1. Lower horizon: Kassinella-LophophyUum densum assemblage containing: Kassinella cf. logiseptata Keller, Parakassinella sinensis Z.J. Wang (gen. et sp. nov.),Amunikephyllum caninophylloidea Z.J. Wang (gen. et sp. nov.), Lophophyllum densumGorsky. The present study shows that the Chuanshangou Formation belongs to the earlypart of Early Carboniferous in age. The description of the new genera is given as follows:Amunikephyllum Z. J. Wang (gen. nov.)Type species: Amunikephyllum caninophylloidea Z. J. Wang (gen. et sp. nov.)Diagnosis: Corallites simple, small to medium sized, and conico—cylindrical in shape, with a peripherial zone of irregular lonsdaleoid dissepiments. Both major and minor septa thin and long, but not extending to the centre; apical ends of a few septa not extending to epitheca, being interrupted by lonsdaleoid dissepimends. All septa thickened in the narrow dissepimentarium. Cardinal fossula prominent. The tabulae incomplete, central tabulae concave, peripheral tabulae convex upward and extroverted.Remarks: This genus closely resembles Caninia dorlodoti Salée from the Tournaisian of Europe, but slightly differs from the latter in that all septa thicken in tabularium, fewer in number and corallite larger. It also shows a close similarity to Caninophyllum Lewis, but the latter has thickened septa within the cardinal quadrants and has no peripherical zone of lonsdaleoid dissepimentarium. The new genus is similar to Siphonophyllia Scouler in having peripheral lonsdaleoid dissepimentarium, septa of two orders and well defined cardinal fossula, but the latter genus is marked by a well developed lonsdaleoid dissepimentarium, short septa and flat or convex tabulae.Parakassinella Z. J. Wang (gen. nov.)Type species: Parakassinella sinensis Z.J. Wang (gen. et sp. nov.) Diagnosis: Corals simple small, cylindrical, septa of two order, end of septa not extending to the centre. Major septa slightly thickened in tabularium, minor septa short. Phyllotheca is outstanding. One range of lonsdaleoid dissepimentarium was developed in adult stage. Tabulae complete and strongly concave.Remarks: This new genus similar to Kassinella Keller, differs from the latter in that strongly concave tabulae. It is also related to Visiculophyllum Easton, but in the Visiculophyllum the corallite is large with thick and a lot of septa, well developed and wider lonsdaleoid dissepimentarium in periphery.更多还原