Fig. 1 in Systematic revision of the Plectopylinae (Gastropoda, Pulmonata, Plectopylidae)

Fig. 1. Nomenclature of parietal (A–C) and palatal (D–F) lamellae and plicae of plectopylids. A. Chersaecia Gude, 1899 sp. with a single lamella. B. Chersaecia sp. with two lamellae. C. Plectopylis Benson, 1860 sp. D–E. Chersaecia spp. F. Plectopylis sp. The long arrow shows the order of counting of the plicae. Abbreviations: af = apertural fold; al = anterior lamella; ap = additional plica; ip = intermediate plica; l = lamella; ll = left leg; lp = lower plica; mp = main plica; p = peristome; pl = posterior lamella; rl = right leg; ub = upper branch. Arrows under the numbers indicate the direction of the aperture.