Demonax Kinberg, 1867: 354; 1910: 72.— Johansson, 1925: 26 –27; 1927: 136.— Knight-Jones, 1983: 254.— Perkins, 1984: 292 –293.— Knight-Jones and Walker, 1985: 605.— Fitzhugh, 1989: 75 –76.— Giangrande, 1994: 229 –230. Parasabella Bush, 1905: 191, 199, 200.— Johansson, 1927: 136.
Distylidia Hartman, 1961: 129.— Fauchald, 1977: 138.— Banse, 1979: 870.
Demonax flecatus (Hoagland, 1919)
Parasabella flecatus Hoagland, 1919: 580, Figs 3–8. Demonax flecatus.— Knight-Jones, 1983: 260 –261, Fig. 7. Type locality: Puerto Rico.
Type material: AMNH (HT).
Records: No additional records.
Demonax jamaicensis (Augener, 1922)
Parasabella jamaicensis Augener, 1922 b: 48.
Demonax jamaicensis.— Johansson, 1927: 136.— Perkins, 1984: 315 –317, Fig. 17.— Tovar-Hernández and Salazar-Vallejo, 2006: 38, Fig. 8.— Giangrande et al. 2007: 45, Fig 1 C. Sabella jamaicensis.— Hartman, 1959: 560.
Type locality: Jamaica, Kingston.
Type material: ZMH V- 6791 (HT).
Records: Saint Thomas (Tovar-Hernández & Salazar-Vallejo 2006); Belize (Giangrande et al. 2007).
Demonax lacunosus Perkins, 1984
Demonax lacunosus Perkins, 1984: 317 –321, Figs 18–20. Type locality: Florida, Hutchinson Island, 27 º 22.9’ N, 80 º 13.9’’ W, coarse calcareous sand, 11 m. Type material: USNM 54725 (HT).
Records: Only known for the type locality.
Demonax microphthalmus (Verrill, 1873)
Sabella microphthalma Verrill, 1873: 618.— Johansson, 1927: 128.— Hartman, 1942: 80; 1945: 47; 1951: 117.
Parasabella microphthalma.— Bush, 1905: 200.
Demonax microphthalmus.— Perkins, 1984: 300–304, Figs 6–8.— San Martín et al. 1994: 559. Type locality: Massachusetts, New Haven to Vineyard Sound, 8.5 m. Type material: USNM 13079 (ST).
Records: Gulf of Mexico (Perkins 1984); Cuba (San Martín et al. 1994).