Tellina diantha (Boss, 1964)

The Tellina diantha is small brittle shell, measuring up to just over ½in. Its color is pink or pinkish-orange with a brown periostracum. The surface smooth and polished, with many fine concentric growth lines. The interior of shell is smooth, polished, and is the same color as exterior. Its posterior radial ridge present is close to the dorsal margin. The right valve bears 2 cardinal teeth (1 anterior and 1 posterior lateral). The left valve bears 2 cardinal teeth and 1 posterior lateral, but there is no anterior lateral. The lateral teeth are weak and only appear as raised or thickened portions of the dorsal margin. The pallial sinus is well developed, reaching past the midline but falling short of the anterior adductor muscle scar. Confluent is found along its length with the pallial line. Anterior adductor muscle scar is slightly thinner and longer than the posterior one. It differs from the small specimens of Tellina trinitatis in that the pallial sinus is further away from the dorsal margin. This species is extremely rare.