Monophyllus Leach 1821
Monophyllus Leach 1821, Trans. Linn. Soc. Lond., 13: 75.
Type Species: Monophyllus redmani Leach 1821
Species and subspecies: 2 species with 6 subspecies:
Species Monophyllus plethodon Miller 1900
Subspecies Monophyllus plethodon subsp. plethodon Miller 1900
Subspecies Monophyllus plethodon subsp. frater Anthony 1917
Subspecies Monophyllus plethodon subsp. luciae Miller 1902
Species Monophyllus redmani Leach 1821
Subspecies Monophyllus redmani subsp. redmani Leach 1821
Subspecies Monophyllus redmani subsp. clinedaphus Miller 1900
Subspecies Monophyllus redmani subsp. portoricensis Miller 1900
Discussion: Reviewed by Schwartz and Jones (1967). A key to the genus was published by Homan and Jones (1975 a).