[关键词]
[摘要]
Pseudokoninckinagen.nov.归于康尼克贝类。模式种Pseudokoninckina xinpuensisgen.etsp.nov.的模式标本采自贵州关岭县城西南约35km新铺乡喇嘛村上三叠统下部(Carnian)竹杆坡组中部黑灰或黄灰色石灰岩。其贝体强烈膝曲,拖曳部长;背壳极为深凹,侧坡高又陡峭,两侧区和拖曳部呈薄壳状;两耳翼端强烈向背方膝曲;背三角孔覆有背三角双板,但腹三角孔洞开。腹内两侧隔板极高又长;腹中隔脊低宽,前部二分叉,后部三分叉。背内第三壳层厚,在背壳底两侧区隆起呈两条隆脊;主突起高强。壳表饰有微弱同心线和毛发状放射纹。这些特征在康尼克贝类中是很独特的。
[Key word]
[Abstract]
The new genus, Pseudokoninckina gen. nov., belongs to the koninckinoid.The type specimens of Pseudokoninckina xinpuensis gen. et sp. nov. occurs in blackish-grey or yellowish-grey limestone of the middle part of the Zhuganpo Formation of Upper Triassic (Carnian), Lamacun Village (Text-fig.1), Xinpu area , about 35km southwest of Guanling County Town, Guizhou Province, southwest China. This new genus is associated with brachiopods Sanqiaothyris, Aulacothyris. Only this new genus is described in this paper. To date there are now eight genera recorded within the koninckinoid. All of these genera are smooth externally, only genus Lamellokoninckina Jin et Fang (1977) with concentric growth lines.Therefore, that the new genus, Pseudokoninckina gen. nov. is the first record of a koninckinoid with costellae.
[中图分类号]
Q915.862 P534.51
[基金项目]
中国地质调查局资助项目
