Subgenus (Yoldia) H. P. C. Moller, 1842

(3-6-1-0-3-7-2-115-3-0-0-0-0)
Ref. Wagner, 1984 p 47

amygdalea (A. Valenciennes, 1846)
(3-6-1-0-3-7-2-115-3-1-0-0-0)
Almond Yoldia
Ref. Amer. Fish. Soc., 1988 p 22
Syn. Yoldia (Yoldia) gardneri I. S. Oldroyd, 1935;
Yoldia (Yoldia) limatuloides K. W. Ockelmann, 1954;
Yoldia (Yoldia) norvegica P. Dautzenberg & P. Fischer, 1912
Ref. Wagner, 1984 p 47 bw

arctica M. Sars, 1851
(3-6-1-0-3-7-2-115-3-2-0-0-0)
[=Yoldia (Yoldia) hyperborea ex S. L. Loven, ms, O. M. Torell, 1859]
Ref. Wagner, 1984 p 47

cooperii W. M. Gabb, 1865
(3-6-1-0-3-7-2-115-3-3-0-0-0)
Cooper Yoldia
Ref. Amer. Fish. Soc., 1988 p 22

frigida O. M. Torell, 1859
(3-6-1-0-3-7-2-115-3-4-0-0-0)
[=Portlandia (Yoldiella) frigida (O. M. Torell, 1859)]
Ref. Bernard, 1984 p 17

gardneri I. S. Oldroyd, 1935
(3-6-1-0-3-7-2-115-3-5-0-0-0)
[=Yoldia (Yoldia) amygdalea A. Valenciennes, 1846]
Ref. Wagner, 1984 p 47

glacialis "Gray" of authors, not J. E. Gray, 1828
(3-6-1-0-3-7-2-115-3-6-0-0-0)
[=Yoldia (Yoldia) hyperborea ex S. L. Loven, ms, O. M. Torell, 1859]
Ref. Wagner, 1984 p 47

hyperborea ex S. L. Loven, ms, O. M. Torell, 1859
(3-6-1-0-3-7-2-115-3-7-0-0-0)
Northern Yoldia
Ref. Amer. Fish. Soc., 1988 p 22
Syn. Yoldia (Yoldia) limatula hyperborea G. P. Gorbunov, 1946
Ref. Bernard, 1984 p 20 d bw
Syn. Yoldia (Yoldia) arctica M. Sars, 1851;
Yoldia (Yoldia) glacialis "Gray" of authors, not J. E. Gray, 1828
Ref. Wagner, 1984 p 47 bw

limatuloides K. W. Ockelmann, 1954
(3-6-1-0-3-7-2-115-3-7-1-0-0)
Ref. Lindner, 1977 pl 52 c

intermedia M. Sars, 1865
(3-6-1-0-3-7-2-115-3-8-0-0-0)
[=Portlandia (Yoldiella) intermedia (M. Sars, 1865)]
Ref. Bernard, 1984 p 18

limatula (T. Say, 1831)
(3-6-1-0-3-7-2-115-3-9-0-0-0)
File Yoldia
Ref. Amer. Fish. Soc., 1988 p 22
Syn. Nucula (Nucula) limatula T. Say, 1831
Ref. Wagner, 1984 p 47 bw

hyperborea G. P. Gorbunov, 1946
(3-6-1-0-3-7-2-115-3-9-1-0-0)
[=Yoldia (Yoldia) hyperborea ex S. L. Loven, ms, O. M. Torell, 1859
Ref. Bernard, 1984 p 20

limatuloides K. W. Ockelmann, 1954
(3-6-1-0-3-7-2-115-3-10-0-0-0)
[=Yoldia (Yoldia) amygdalea A. Valenciennes, 1846]
Ref. Wagner, 1984 p 47

martyria W. H. Dall, 1897
(3-6-1-0-3-7-2-115-3-11-0-0-0)
Witness Yoldia
Ref. Amer. Fish. Soc., 1988 p 22

myalis (J. P. Couthouy, 1838)
(3-6-1-0-3-7-2-115-3-12-0-0-0)
Oval Yoldia
Ref. Amer. Fish. Soc., 1988 p 22
Syn. Nucula (Nucula) myalis J. P. Couthouy, 1838;
Yoldia (Yoldia) myalis J. P. Couthouy, 1838
Ref. Bernard, 1984 p 21 bw
Syn. Nucula (Nucula) cascoensis J. W. Mighels & C. B. Adams, 1844;
Nucula (Nucula) myalis J. P. Couthouy, 1838;
Nucula (Nucula) oblongoides W. Wood, 1840
Ref. Wagner, 1984 p 47 bw

norvegica P. Dautzenberg & P. Fischer, 1912
(3-6-1-0-3-7-2-115-3-13-0-0-0)
[=Yoldia (Yoldia) amygdalea A. Valenciennes, 1846]
Ref. Wagner, 1984 p 47

regularis A. E. Verrill, 1884
(3-6-1-0-3-7-2-115-3-14-0-0-0)
Regular Yoldia
Ref. Amer. Fish. Soc., 1988 p 22

sapotilla (A. A. Gould, 1841)
(3-6-1-0-3-7-2-115-3-15-0-0-0)
Short Yoldia
Ref. Amer. Fish. Soc., 1988 p 22
Syn. Nucula (Nucula) gouldii J. E. De Kay, 1843;
Nucula (Nucula) sapotilla A. A. Gould, 1841
Ref. Wagner, 1984 p 48 bw

scissurata W. H. Dall, 1897
(3-6-1-0-3-7-2-115-3-16-0-0-0)
[=Yoldia (Cnesterium) scissurata W. H. Dall, 1897]
Ref. Bernard, 1984 p 19

seminuda W. H. Dall, 1871
(3-6-1-0-3-7-2-115-3-17-0-0-0)
Halfsmooth Yoldia
Ref. Amer. Fish. Soc., 1988 p 22