Stygobromus morrisoni was created in 1967.
Voluta morrisoni was created in 1980.
Olivella morrisoni was created in 1956.
Stygobromus dejectus was created in 1967.
Stygobromus pecki was created in 1967.
Stygobromus gradyi was created in 1974.
Stygobromus ephemerus was created in 1969.
Stygobromus arizonensis was created in 1974.
Stygobromus montanus was created in 1967.
Stygobromus spinatus was created in 1967.
Stygobromus stellmacki was created in 1967.
Stygobromus conradi was created in 1967.
Stygobromus flagellatus was created in 1896.