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

(3-6-1-0-3-8-0-6-2-0-0-0-0)
Ref. Abbott, 1974 p 41
Wagner, 1984 p 48
[see also as Genus]

capsa (W. H. Dall, 1916)
(3-6-1-0-3-8-0-6-2-1-0-0-0)
Ref. Abbott, 1974 p 419

cecinella (W. H. Dall, 1916)
(3-6-1-0-3-8-0-6-2-2-0-0-0)
Ref. Abbott, 1974 p 419

dissimilis (A. E. Verrill & K. J. Bush, 1898)
(3-6-1-0-3-8-0-6-2-3-0-0-0)
Ref. Abbott, 1974 p 419 d
Syn. Yoldiella (Yoldiella) dissimilis A. E. Verrill & K. J. Bush, 1898
Ref. Wagner, 1984 p 48 bw

expansa (J. G. Jeffreys, 1876)
(3-6-1-0-3-8-0-6-2-4-0-0-0)
Ref. Abbott, 1974 p 419

fraterna (A. E. Verrill & K. J. Bush, 1898)
(3-6-1-0-3-8-0-6-2-5-0-0-0)
Ref. Abbott, 1974 p 419 d
Syn. Portlandia (Portlandia) frigida nana Jensen, 1905, not Yoldia nana M. Sars, 1865;
Yoldiella (Yoldiella) fraterna A. E. Verrill & K. J. Bush, 1898
Ref. Wagner, 1984 p 49 bw

frigida (O. M. Torell, 1859)
(3-6-1-0-3-8-0-6-2-6-0-0-0)
Ref. Abbott, 1974 p 418 d
Syn. Yoldia (Yoldia) frigida O. M. Torell, 1859
Ref. Wagner, 1984 p 49 bw

inconspicua (A. E. Verrill & K. J. Bush, 1898)
(3-6-1-0-3-8-0-6-2-7-0-0-0)
Ref. Abbott, 1974 p 419 d
Syn. Yoldiella (Yoldiella) inconspicua A. E. Verrill & K. J. Bush, 1898
Ref. Wagner, 1984 p 49 bw

inflata (A. E. Verrill & K. J. Bush, 1897)
(3-6-1-0-3-8-0-6-2-8-0-0-0)
Ref. Abbott, 1974 p 419 d

intermedia (M. Sars, 1865)
(3-6-1-0-3-8-0-6-2-9-0-0-0)
Ref. Abbott, 1974 p 419
Syn. Yoldia (Yoldia) intermedia M. Sars, 1865;
Yoldiella (Yoldiella) intermedia major J. W. Leche, 1878
Ref. Bernard, 1983 p 49

iris (A. E. Verrill & K. J. Bush, 1897)
(3-6-1-0-3-8-0-6-2-10-0-0-0)
Ref. Abbott, 1974 p 419 d

Var. stricta (A. E. Verrill & K. J. Bush, 1897)
(3-6-1-0-3-8-0-6-2-10-0-0-1)
Ref. Abbott, 1974 p 419

jeffreysi (J. G. Hidalgo, 1879)
(3-6-1-0-3-8-0-6-2-11-0-0-0)
Ref. Abbott, 1974 p 419 d

lenticula (H. P. C. Moller, 1842)
(3-6-1-0-3-8-0-6-2-12-0-0-0)
Syn. Portlandia (Portlandia) amblia A. E. Verrill & K. J. Bush, 1897
Ref. Abbott, 1974 p 419 d
Syn. Nucula (Nucula) lenticula H. P. C. Moller, 1842;
Portlandia (Yoldiella) persei Masjatsev, 1931;
Yoldia (Yoldia) abyssicola O. M. Torell, 1859;
Yoldia (Yoldia) lenticula amblia A. E. Verrill & K. J. Bush, 1898
Ref. Wagner, 1984 p 50 bw

lucida (S. L. Loven, 1846) [T]
(3-6-1-0-3-8-0-6-2-13-0-0-0)
Lucid Yoldia
Ref. Abbott, 1974 p 418 bw

minuscula (A. E. Verrill & K. J. Bush, 1897)
(3-6-1-0-3-8-0-6-2-14-0-0-0)
Ref. Abbott, 1974 p 419 d

oleacina (W. H. Dall, 1916)
(3-6-1-0-3-8-0-6-2-15-0-0-0)
Ref. Abbott, 1974 p 419

orcia (W. H. Dall, 1916)
(3-6-1-0-3-8-0-6-2-16-0-0-0)
Ref. Abbott, 1974 p 419

pachia (A. E. Verrill & K. J. Bush, 1897)
(3-6-1-0-3-8-0-6-2-17-0-0-0)
Ref. Abbott, 1974 p 419

persei Masjatsev, 1931
(3-6-1-0-3-8-0-6-2-18-0-0-0)
[=Portlandia (Yoldiella) lenticula (H. P. C. Moller, 1842)]
Ref. Wagner, 1984 p 50

pygmaea (Munster, 1842)
(3-6-1-0-3-8-0-6-2-19-0-0-0)
Ref. Abbott, 1974 p 419

sanesia (W. H. Dall, 1916)
(3-6-1-0-3-8-0-6-2-20-0-0-0)
Ref. Abbott, 1974 p 419

sericea
(3-6-1-0-3-8-0-6-2-21-0-0-0)

sericea
(3-6-1-0-3-8-0-6-2-21-1-0-0)

striolata (J. G. Jeffreys, 1876)
(3-6-1-0-3-8-0-6-2-21-2-0-0)
Ref. Abbott, 1974 p 419

siliqua (L. A. Reeve, 1855)
(3-6-1-0-3-8-0-6-2-22-0-0-0)
Ref. Abbott, 1974 p 419

subangulata (A. E. Verrill & K. J. Bush, 1898)
(3-6-1-0-3-8-0-6-2-23-0-0-0)
Ref. Abbott, 1974 p 419 d

subequilatera (J. G. Jeffreys, 1879)
(3-6-1-0-3-8-0-6-2-24-0-0-0)
Ref. Abbott, 1974 p 419