An Ichnofossil, U-shaped Burrow, in Continental Depositfrom the Lower Devonian Danlin Formation in DushanCounty, Guizhou Province, ChinaWANG Yue1,2(1. Faculty of Earth Sciences and Mineral Resources, ChinaUniversity of Geosciences, Beijing 100083; 2. Faculty ofResource and Environment, Guizhou University, Guiyang,Guizhou 550003)Diplocraterion Torell 1870, U-shaped with spreite, wasconsidered to be one of the main ichnofossils of Skolithosichnofacies of Seilacher (1964, 1967) and…