Subgenus (Megayoldia) A. E. Verrill & K. J. Bush, 1897

(3-6-1-0-3-14-1-7-4-0-0-0-0)
Ref. Bernard, 1983 p 14
[see also as Genus]

beringiana W. H. Dall, 1916
(3-6-1-0-3-14-1-7-4-1-0-0-0)
Syn. Yoldia (Yoldia) beringiana W. M. Dall, 1916
Ref. Bernard, 1983 p 14

martyria W. H. Dall, 1897
(3-6-1-0-3-14-1-7-4-2-0-0-0)
Syn. Yoldia (Yoldia) martyria W. H. Dall, 1897
Ref. Bernard, 1983 p 14

montereyensis W. H. Dall, 1893
(3-6-1-0-3-14-1-7-4-3-0-0-0)
Syn. Yoldia (Yoldia) montereyensis W. H. Dall, 1893
Ref. Bernard, 1983 p 14

thraciaeformis (D. H. Storer, 1838)
(3-6-1-0-3-14-1-7-4-4-0-0-0)
Syn. Nucula (Nucula) thraciaeformis D. H. Storer, 1838;
Yoldia (Yoldia) multidentata I. P. Khomenko, 1937;
Yoldia (Yoldia) secunda W. H. Dall, 1916
Ref. Bernard, 1983 p 14