houbrick robertson (1 resultados)

Fastigiella carinata is placed in the family Cerithiidae, close to the genus Pseudovertagus Vignal on the basis of conchological, radular, and anatomical characters. Fastigiella has a shell sculptured with three strong spiral cords, an aperture with a distinct anterior canal, a pseudumbilicus, missing in juveniles, and a siphonal fasciole. The operculum is ovate, corneous, and paucispiral with an eccentric nucleus, and the radula is taenioglossate. The animal has an unusual hypobranchial gland comprised of many transverse leaflets, a ridge dividing the anterior oviductal groove, and an open pallial oviduct with the seminal receptable in the medial lamina of the posterior oviduct. 10 pp., 22 figs, 4.