First Report of Small Skeletal Fossils from the Upper Guojiaba Formation (Series 2, Cambrian), Southern Shaanxi, South China
نویسندگان
چکیده
A small skeletal fossil assemblage is described for the first time from bioclastic limestone interbeds of siltstone-dominated Guojiaba Formation, southern Shaanxi, China. The carbonate-hosted fossils include brachiopods (Eohadrotreta zhujiahensis, Eohadrotreta zhenbaensis, Spinobolus sp., Kuangshanotreta malungensis, Kyrshabaktella Lingulellotreta yuanshanensis, Eoobolus incipiens, and sp.), sphenothallids (Sphenothallus archaeocyaths (Robustocyathus sp. Yukonocyathus bradoriids (Kunmingella douvillei), chancelloriids sclerites (Onychia Allonnia Diminia Archiasterella pentactina, Chancelloria cf. eros), echinoderm plates, fragments trilobites (Eoredlichia hyolithelminths. discovery in Formation significantly extends their stratigraphic range South China early Tsanglangpuian at least to late Chiungchussuan. Thus, now represents lowest known horizon where archaeocyath have been found Shaanxi area. overall most comparable, terms composition, Small (SSF) assemblages Cambrian Chengjiang fauna recovered Yu’anshan eastern Yunnan Province. existing position that correlated with Stage 3 Series 2 strongly upheld based on this study.
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ژورنال
عنوان ژورنال: Biology
سال: 2023
ISSN: ['2079-7737']
DOI: https://doi.org/10.3390/biology12070902