Genus Wallucina Iredale, 1930

Wallucina Iredale, 1930: 390 . Type species: Lucina jacksoniensis Smith, 1885 (prior valid name Wallucina assimilis (Angas, 1867)) (original designation).

DIAGNOSIS. — Shells small, subcircular in outline. Moderately inflated, relatively thin-shelled. Sculpture of fine, closely spaced commarginal lamellae, sometimes slightly raised to posterior, fine radial stri ations sometimes present. Hinge plate narrow. RV with single cardinal tooth and posterior lateral tooth, anterior lateral absent or very small. LV with two cardinal teeth and a posterior lateral tooth. Ligament internal, set in elongate,oblique resilifer.Anterior adductor muscle scar elongate, detached from pallial line for about 1/2 to 1/3 of length. Pallial line irregularly lobed and divided. Inner shell margin finely crenulate.