Mauritia arabica

Lore & Background

The Arabian cowry has a shell that is oblong or nearly elliptical, with a barely distinguishable spire dorsally. The aperture is very narrow and long, and both lips are ornamented with arrays of small teeth. The dorsal side is convex or bent, never depressed, and the dorsal mantle groove is easily perceivable because it differs from the shell's general color pattern. The lateral margins are calloused, mainly toward the posterior and anterior ends, and the ventral side is typically flattened, sometimes slightly concave. The shell surface is notably shiny, as if polished. The color is generally cream to light fawn dorsally with brown shades, while the ventral side is cream to grey. The labral teeth are reddish brown and white toward the columella. The common name derives from a dense, irregular pattern of thin longitudinal brown lines, sometimes interrupted by empty spaces, that resembles Arabic script. Mauritia arabica is easily confused with its close relative Mauritia eglantina, but M. eglantina has a dark blotch near the spire (which M. arabica lacks) and generally a narrower, more elongate-cylindrical shell form.

Reader's Guide

Mauritia arabica is distributed widely across the Indo-West Pacific, from East and South Africa (including Madagascar, but not the Red Sea nor the Persian Gulf) to eastern Polynesia, and from Japan south to New South Wales, Australia. It dwells under boulders and stones, and also shelters in caverns on the outskirts of coral reefs, living in low intertidal zones to shallow sublittoral depths. The snail is mainly active at night. It is collected for food by locals in many areas, and its shell is commonly used in shellcraft. Several subspecies have been recognized, including Mauritia arabica arabica, Mauritia arabica asiatica, Mauritia arabica grayana (now considered a synonym of Mauritia grayana), Mauritia arabica immanis, Mauritia arabica khanhhoaensis, Mauritia arabica merguina (which some sources treat as a separate subspecies but is listed under Mauritia arabica asiatica, though not studied molecularly), Mauritia arabica ngocngai, Mauritia arabica nhatrangensis, Mauritia arabica phanrangensis, and Mauritia arabica thachi. The species is also known from fossil records in Cenozoic deposits of western Pacific islands.

Did You Know?

• The maximum shell length of Mauritia arabica is 105 mm, though it commonly reaches only 80 mm.
• The shell's pattern of thin longitudinal brown lines is considered similar to Arabic script, giving the species its common name.
• Mauritia arabica is easily confused with Mauritia eglantina, but M. eglantina has a dark blotch near the spire that M. arabica lacks.
• This species is collected for food by locals and its shell is commonly used in shellcraft.