About Notogibbula preissiana (R.A.Philippi, 1849)
The shell of Notogibbula preissiana measures between 7 mm and 9 mm in size. It is a rather thick, deeply umbilicate shell with an orbicular-depressed shape. It has 5 to 5½ whorls separated by deep sutures. The shell is whitish, with prominent ornamentation of wavy rosy-brownish lines, and isolated spots along the suture and periphery. The earliest whorls are smooth. Subsequent whorls have fine spiral grooves, with an elevated ridge running across their midsection. The body whorl has two elevated, widely spaced bands (cinguli). The convex base of the shell features concentric ridges, which are larger around the umbilicus. The umbilical area has grooves and a twisted rope-like structure internally. The aperture is nearly rounded. The columella is curved and lacks teeth. This marine species is endemic to Australia, where it is found off the coasts of South Australia, Victoria, and Western Australia.
