Cassidae

Phalium areola

(Linnaeus, 1758)

An intertidal, sandy mud-dwelling species.
Description — SHell 39 to 91 mm in length, solid, heavy, with 5 rows of large, squarish brownish spots, with 2 to 5 former varices showing in the spire, and with a moderately developed columellar shield. Nuclear whorls 2, bidimoid, smooth, glossy, white or tan. Post-nuclear whorls slightly round, and bearing about 5 to 7 spiral rows ol fine beads which disappear in the last whorl. 2 to 5 former varices present in the spire. Last whorl smoothish, but may have weak axial wrinkles on the shoulder and 3 or 4 weak spiral grooves at the base. The dorsum is sometimes humped because of an underlying, former varix. Aperture elongate, tan to dark-brown within. Parietal shield moderately developed, 3 rows of square spots showing on the parietal wall; the left edge ol the columellar shield is sharp and is cemented to the lower half of the first former varix. Columella with a dozen or so slanting, irregular, raised, whitish plicae and elongate pustules. The upper end of the parietal wall bears 2 to 4 short, oblique plicae. Outer lip thick, whitish, with 5 weak, inanve bars, and with about 15 to 20 small, raised teeth on the inner edge. Siphonal canal short, recurved and stained with mauve-brown on its inner edge. Umbilicus almost sealed by a former varix. False umbilicus sealed or minutely open.

[Indo Pacific Mollusca, Vol 2 No 9. 1968. p12-540]

double island point
Rainbow beach

found dead in sand on beach after heavy seas
55 mm

Collected 1999

Hutchinson Shoal
off northern Moreton Island

found dead in sand on coral reef
81 mm

Collected 2000