FIGURE 22 in A morphology-based phylogenetic analysis of Fasciolariidae (Gastropoda: Buccinoidea)

FIGURE 22. Roof of the pallial cavity in the osphradium and ctenidium region. A. Peristernia nassatula, ctenidium by osphradium width ratio is less than 1 (char. 30: 0). B. Dolicholatirus sp. ctenidium by osphradium width ratio is 1 to less than 1.5 (char. 30: 1). C. Buccinum undatum, ctenidium by osphradium width ratio is 1.5 or greater (char. 30: 2). Lines indicate the ratio of the width, evidencing the gradual increase in ctenidium width by osphradium width ratio. Abbreviations: cn, ctenidium; os, osphradium. Scales= 1 mm.