Subgenus (Portlandia) O. A. L. Morch, 1857

(3-6-1-0-3-14-2-5-1-0-0-0-0)
Ref. Bernard, 1983 p 13

arctica (J. E. Gray, 1824)
(3-6-1-0-3-14-2-5-1-1-0-0-0)
Syn. Leda (Portlandia) collinsoni W. H. Dall, 1919;
Nucula (Nucula) arctica J. E. Gray, 1824, not W. J. Broderip & G. B. Sowerby, 1829;
Nucula (Nucula) glacialis W. Wood, 1828, not J. E. Gray, 1825;
Nucula (Nucula) siliqua L. A. Reeve in E. Belcher, 1855;
Yoldia (Yoldia) arctica inflata J. W. Leche, 1883;
Yoldia (Yoldia) oleacina W. H. Dall, 1916
Ref. Bernard, 1983 p 13

dalli A. Krause, 1885
(3-6-1-0-3-14-2-5-1-2-0-0-0)
Ref. Bernard, 1983 p 13

persei Messjatsev, 1931
(3-6-1-0-3-14-2-5-1-3-0-0-0)
[=Yoldiella (Yoldiella) lenticula (H. P. C. Moller, 1842)]
Ref. Bernard, 1983 p 14