Fig. 1 in Early Cambrian "soft-shelled" brachiopods as possible stem-group phoronids

Fig. 1. Light micrographs (A1, B1) and camera lucida drawings (A2, B2) of lingullotretid brachiopod Lingulosacculus nuda gen. et sp. nov. A. GSC−34952, with the smaller oval−shaped dorsal valve superimposed on the larger coniform ventral valve. B. GSC−34953 (holotype), with the smaller dorsal valve largely obscured by the superimposed ventral valve; white arrows in B1 indicate the margins of the propareas on the ventral pseudointerarea.