Figure 19 in Refining molluscan characters: morphology, character coding and a phylogeny of the Caenogastropoda

Figure 19. Midgut morphology. White arrows indicate direction of ciliary currents. (A) Ilyanassa obsoletus, dorsal view. (B) Urosalpinx cinerea, dorsal view. Scale bar = 1 mm. Abbreviations: ce, caecal extension; dgd, digestive gland duct; e, oesophagus; gp, glandular pad; gs, gastric shield; ig, intestinal groove; int, intestine; po, pouch; sa, sorting area; ss, style sac; t1, major typhlosole; t2, minor typhlosole.