Fig. 3From: An early Daonella from the Middle Anisian of Guangxi, southwestern China, and its phylogenetical significanceStratigraphical and lithological columns of the Middle Triassic in the Fengshan area, northwestern Guangxi, and occurrences of bivalves, with emphasis on the Anisian Banna Formation (Fm Formation, Mb Member; note the different scales for Lower Member and Upper Member of the Banna Formation); taxonomic identifications of the Late Anisian and Ladinian bivalves by Chen et al. (1992)Back to article page