Shell elongate oval, dorsally convex, hardly carinate. Anterior valve with faint concentric wrinkles, intermediate valves divided into lateral areas, on which the wrinkles are parallel to the axis, and a central area where the wrinkles are transverse to the axis. Girdle moderately broad, with small (0.4 x 0.3 mm) scales forming a regular quinconcial pattern. Base (attached side) of scales with a central notch, outer side of scales with 11-14 fine, raised riblets.
shell dirty-white to yellowish or pinkish, mottled with dark purplish spots on the median areas of valves. Girdle alternating darker and lighter areas, also sometimes with purplish scales.
common size :
Mediterranean specimen: 16 mm long; up to 20 x 12 mm for Indian Ocean specimens.
The native Mediterranean species of Chiton species striae have radiating rather than concentric sculpture on the valve. The notch of the girdle scales is an unusual character (Kaas, 1979), and the series of blotches on the valves is also a good guide to this species.
BIOLOGY / ECOLOGY
on hard substrates including valves of larger molluscs, in shallow water.