FIGURE 4 in Three new species of Ammonicera from the Eastern Pacific coast of North America, with redescriptions and comments on other species of Omalogyridae (Gastropoda, Heterobranchia)

FIGURE 4. Ammonicera sleursi sp. nov. A–B. Holotype, apical views; A. General view; B. Detail of the protoconch (interpreted boundary between protoconch and ...