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应用Johns等(1997)的形态分类系统,对首次报道出现于贵州关岭地区中上三叠统的软骨鱼类的微体化石进行了初步研究,描述了其中的1个牙齿化石(可能属于弓鲛鲨科的)和7个鳞片类化石的形态属种,其中包括两个鳞片类化石的新属种,即Lobaticoronacf.floriditurris,Sacrisubcoronacf.circabasis,Glabrisubcoronacf.arduidevexa,Parvi-coronadacrysulcan.gen.et.n.sp.s.f.,Annulicoronapyramidalisn.gen.et.n.sp.s.f.,new(?)parageneraA和new(?)parageneraB。还初步探讨了软骨鱼类微体化石在三叠纪地层划分中的应用,以及中国西南部三叠纪软骨鱼类与北美相当地层中软骨鱼类的洲际对比。
Using the morphological classification system of Johns et al. (1997), we first conducted a preliminary study on the microfossils of the chondrichthyes that appeared in the upper and middle Triassic of the Guanling area in Guizhou Province, and described one of the fossil teeth (possibly belonging to the bow Scirpus species) and seven scaly fossil species, including two new species of taxonomic fossils, namely Lobaticoronacf.floriditurris, Sacrisubcoronacf.circabasis, Glabrisubcoronacf.arduidevexa, Parvi-coronadacrysulcan.gen.et.n .sp.sf, Annulicoronapyramidalisn.gen.et.n.sp.sf, new (?) parageneraA and new (?) parageneraB. The application of microfossils of cartilaginous fishes in Triassic stratigraphy and the intercontinental comparison of Triassic cartilaginous fishes in Southwest China with that in North America were also discussed.