Subgenus (Saccella) W. P. Woodring, 1925

(3-6-1-0-3-8-0-4-6-0-0-0-0)
Syn. (Ledina) F. Sacco, 1898, not W. H. Dall, April, 1898
Ref. Abbott, 1974 p 414

acrita (W. H. Dall, 1908)
(3-6-1-0-3-8-0-4-6-1-0-0-0)
Syn. Nuculana (Nuculana) laeviradius H. A. Pilsbry & H. N. Lowe, 1932
Ref. Abbott, 1974 p 416

acuta (T. A. Conrad, 1831)
(3-6-1-0-3-8-0-4-6-2-0-0-0)
Pointed Nut Clam
Ref. Abbott, 1974 p 414 d

burchi G. Willett, 1944
(3-6-1-0-3-8-0-4-6-3-0-0-0)
Burch's Nut Clam
Ref. Abbott, 1974 p 415

commutata R. A. Philippi, 1844 [T]
(3-6-1-0-3-8-0-4-6-4-0-0-0)
Ref. Abbott, 1974 p 414

concentrica (T. Say, 1824)
(3-6-1-0-3-8-0-4-6-5-0-0-0)
Concentric Nut Clam
Syn. Nuculana (Nuculana) eborea T. A. Conrad, 1848
Ref. Abbott, 1974 p 414 bw

hindsii (S. C. T. Hanley, 1860)
(3-6-1-0-3-8-0-4-6-6-0-0-0)
Hinds' Nut Clam
Syn. Nuculana (Nuculana) redondoensis J. Q. Burch, 1944;
Nuculana (Nuculana) redondoensis W. P. Woodring, 1951
Ref. Abbott, 1974 p 415

impar (H. A. Pilsbry & H. N. Lowe, 1932)
(3-6-1-0-3-8-0-4-6-7-0-0-0)
Ref. Abbott, 1974 p 416

penderi (W. H. Dall & P. Bartsch, 1910)
(3-6-1-0-3-8-0-4-6-8-0-0-0)
Pender's Nut Clam
Ref. Abbott, 1974 p 415 d

taphria (W. H. Dall, 1897)
(3-6-1-0-3-8-0-4-6-9-0-0-0)
Taphria Nut Clam
Syn. Nucula (Nucula) caelata R. B. Hinds, 1843, not T. A. Conrad, 1833
Ref. Abbott, 1974 p 415 bw