Genus Stenosemus A. T. v Middendorff, 1847

(7-0-5-3-0-5-4-20-0-0-0-0-0)
Ref. Amer. Fish. Soc., 1988 p 149
[see also as Subgenus under Genus Ischnochiton]

albus (C. v. Linne, 1767)

(7-0-5-3-0-5-4-20-0-1-0-0-0)
Northern White Chiton
Ref. Amer. Fish. Soc., 1988 p 149

exaratus (G. O. Sars, 1878)

(7-0-5-3-0-5-4-20-0-2-0-0-0)
Ref. Amer. Fish. Soc., 1988 p 149