Subgenus (Larkinia) P. W. Reinhart, 1935

(3-7-3-0-1-1-1-2-11-0-0-0-0)
Ref. Abbott, 1974 p 422
Bernard, 1983 p 15
Keen, 1971 p 48
Vaught, 1989 p 115
[see also as Genus]

baughmani L. G. Hertlein, 1951
(3-7-3-0-1-1-1-2-11-1-0-0-0)
Baughman Ark, Baughman's Ark
Ref. Amer. Fish. Soc., 1988 p 24
Syn. Anadara (Anadara) springeri H. A. Rehder & R. T. Abbott, 1951
Ref. Abbott, 1974 p 423 bw

larkinii E. T. Nelson, 1870 [f][T]
(3-7-3-0-1-1-1-2-11-2-0-0-0)
[Pliocene from Peru and Ecuador] Ref. Abbott, 1974 p 422

multicostata (G. B. Sowerby, 1833)
(3-7-3-0-1-1-1-2-11-3-0-0-0)
Many-ribbed Ark
Ref. Abbott, 1974 p 422 bw
Amer. Fish. Soc., 1988 p 24
Keen, 1971 p 48 bw
Syn. Arca (Arca) brandtii R. A. Philippi, 1845;
Arca (Arca) camuloensis V. C. Osmont, 1904;
Arca (Arca) multicostata G. B. Sowerby, 1833
Ref. Bernard, 1983 p 15

notabilis (P. F. Roding, 1798)
(3-7-3-0-1-1-1-2-11-4-0-0-0)
Eared Ark
Ref. Amer. Fish. Soc., 1988 p 24
Syn. Anadara (Anadara) deshayesi S. C. T. Hanley, 1843
Ref. Abbott, 1974 p 422 bw
Abbott & Dance, 1982 p 292 c

transversa (T. Say, 1822)
(3-7-3-0-1-1-1-2-11-5-0-0-0)
Transverse Ark
Ref. Amer. Fish. Soc., 1988 p 24
Syn. Anadara (Anadara) sulcosa van Hyning, 1946
Ref. Abbott, 1974 p 423 bw
Abbott & Dance, 1982 p 292 c
Syn. Arca (Arca) transversa T. Say, 1822
Ref. Bernard, 1983 p 15