Broderipia rosea

Lore & Background

The shell of Broderipia rosea is limpet-like but with a recurved beak projecting beyond the posterior outline of the aperture. It is very convex, sloping convexly toward the front margin. The surface is lusterless, showing under a lens rather rude concentric growth lines and very numerous, close, fine striae radiating from the apex to the margins. The coloration consists of narrow red stripes obliquely descending from the median line to the borders, forming a series of V-shaped markings. The beak is rolled forward and a trifle inclined laterally, but the dextral apical whorl is lost. The aperture is oval, its posterior margin scarcely expanded, and its cavity is deep, scarcely perceptibly and nacreous.

Reader's Guide

Broderipia rosea is a species of sea snail in the family Trochidae, documented in the works of Broderip (1834), Cernohorsky (1978), and Maes (1967). Its shell dimensions—height 4.3 mm and diameter 2.5 mm—and distinctive limpet-like form with a recurved beak set it apart within the top snails. The species is distributed across the Red Sea, Indian Ocean, and Pacific Ocean, with specific records off the Cocos Keeling Islands and Sri Lanka. The shell's lusterless surface, concentric growth lines, and fine radiating striae, combined with narrow red V-shaped stripes, provide diagnostic features. The loss of the apical whorl and the deep, nacreous cavity further characterize this mollusk. Its significance lies in its unique morphology among Trochidae, as described in the original 1834 publication by Broderip and subsequent regional studies.

Did You Know?

• The shell height attains 4.3 mm and diameter 2.5 mm.
• The shell is limpet-like with a recurved beak projecting beyond the posterior outline.
• Coloration consists of narrow red stripes forming V-shaped markings.
• This species occurs in the Red Sea, Indian Ocean, and Pacific Ocean.