Locality: Phuket Island, Thailand.
Original Description: "Shell rather small, up to 22.5 mm in height, convex, slightly oblique, higher than wide, nearly equilateral, auricles unequal (7.8 x 5.5 mm), umbonal angle 90°. The exterior surface of the left valve is composed with eight rounded radial costae, covered with delicate closely arranged concentric lamellae. The radial interstices are smaller than the radial costae and developed with one to three secondary riblets. The primary costae bear one small crest on the central part. The ventral margin is slightly undulated. The anterior auricle is larger, and provided with a few more radial riblets (7), than the posterior one (5). The sculpture of the right valve is similar to the left, although the secondary radial riblets are very weak and only visible near the periphery. The radial riblets on the anterior auricle are more prominent than on the posterior. On the anterior and posterior side of the dorsal margin strongly developed spines are present. Hinge line is straight. The inner surface is silky and glossy, ornamented with radial plicae, more dominant near the ventral margin. Resilial pit is oblique and triangular. Resilial, intermediate and dorsal teeth well developed and orange-red in colour. Ctenolium present (3 teeth). Byssal notch rather small. The colour of the left valve is pinkish-purple with creamy maculations; the right valve more yellowish-white. The inner side white and glossy with an orange-red blotch near the
dorsal margin." (fide Dijkstra & Roussy, 1994) Size: Normal adult size range is 18 to 20 mm. Distribution: From Phuket Island, Thailand. Habitat: Littoral to sublittoral zones, on sandy bottoms with coral rubble.
Remarks: Sometimes confused with B. oweni (De Gregorio,
1884). However, B. adorabilis is more convex and has fewer ribs. Relevant Literature: Dijkstra & Roussy, 1994.