About Astralium tentoriiforme (Jonas, 1845)
The shell of Astralium tentoriiforme measures between 25 mm and 45 mm in length. This solid, imperforate shell has an elate-conic shape and a pale yellowish color pattern. The spire is elevated and holds 7–8 whorls, which are very obliquely finely wrinkled and flat on their upper surfaces. The base of the shell is concave. The shell's periphery is sharply keeled, with faint longitudinal folds located above the carina. The base features numerous regular, concentric, scaly lirae. The aperture is very oblique; it is silvery on the interior and angled at the carina. The basal margin is nearly straight and tinted pink. The short columella is wide and curved, sometimes pinkish, and ends in a tubercle at its lower end. The parietal callus usually covers more than half of the shell's base surface, and its margin is often elevated. The operculum is oval; it is brown on the interior with a sublateral nucleus, and white on the exterior, with a curved, faint central rib and a faint short basal rib. This marine species is endemic to Australia, where it is found off the coast from Queensland to New South Wales.
