02 Chthamalus montagui

02 Chthamalus montagui

Rounded kite-shape aperture; resembles some C. stellatus. Terga (1) fill less than a third of aperture. Faint sutures (2) delineate narrow rostral plate (3) butting onto (rostro-) lateral plates (4). On rock. Portland Bill, Dorset. April 2012.