Genus Acar J. E. Gray, 1857

(3-7-3-0-1-1-2-2-0-0-0-0-0)
Ref. Vokes, 1980 p 11
[see also as Subgenus under Genus Barbatia]
Ref. Abbott, 1974 p 422

bailyi P. Bartsch, 1931
(3-7-3-0-1-1-2-1-0-1-0-0-0)
[=Barbatia (Acar) bailyi (P. Bartsch, 1931)]
Ref. Bernard, 1983 p 14

hawaiensis W. H. Dall, P. Bartsch & H. A. Rehder, 1938
(3-7-3-0-1-1-2-1-0-2-0-0-0)
[=Barbatia (Acar) divaricata (G. B. Sowerby, 1833)]
Ref. Bernard, 1983 p 15

laysana W. H. Dall, P. Bartsch & H. A. Rehder, 1938
(3-7-3-0-1-1-2-1-0-3-0-0-0)
[=Barbatia (Acar) divaricata (G. B.Sowerby, 1833)]
Ref. Bernard, 1983 p 15