Invalid names: Leionucula ovatotruncata Scarlato 1981 [synonym], Nucula (Ennucula) balboana Hertlein and Grant 1972 [synonym], Nucula (Ennucula) microsperma Berry 1947 [synonym], Nucula (Leionucula) leptodonta Bernard 1983 [synonym], Nucula bellotii Adams 1856 [synonym], Nucula expansa Reeve 1855 [synonym], Nucula quirica Dall 1916 [synonym]