A gregarious lingulid brachiopod Longtancunella chengjiangensis from the Lower Cambrian, South China

摘要: Longtancunella chengjiangensis, one of the sparse lingulid brachiopods from Early Cambrian Chengjiang Lagerstatten southwestern China, is characterized by a sub-circular shell shape, stout pedicle, and notably gregarious occurrences in fossils. This brachiopod form was briefly reported 1999, but its detailed description, however, remains to be done. The material our collection remarkably well preserved allows accounts morphology valve interiors, including lophophores, mantle canals, digestive tract. When compared with coeval Xianshanella haikouensis Zhang & Han, 2004, L. chengjiangensis exhibits some distinct features, tenuous marginal setae distinguishable canals relative short pedicle tapering posteriorly.