Subgenus (Micropiliscus) W. H. Dall, 1927

(5-4-1-3-2-11-10-11-5-0-0-0-0)
Ref. Abbott, 1974 p 41
Lindner, 1977 p 38
Vaught, 1989 p 10

constricta W. H. Dall, 1927 [T]
(5-4-1-3-2-11-10-11-5-1-0-0-0)
Ref. Abbott, 1974 p 41