Stygobromus is a genus of amphipod crustaceans that live in subterranean habitats. The majority of the listed species are endemic to North America (one from Canada, the rest from the United States), a smaller number of species are also known from Eurasia. Most of the North American species live in areas which were not covered by the Laurentide Ice Sheet, although a few species seem to have survived under the ice. A number of species are on the IUCN Red List as endangered species (EN) or vulnerable species (VU); one species, S. lucifugus, is extinct.
Stygobromus includes the following species:
Stygobromus abditus Holsinger, 1978 (
Virginia)
Stygobromus ackerlyi Holsinger, 1978 (
Georgia)
Stygobromus alabamensis (Stout, 1911)
Stygobromus albapinus Taylor & Holsinger, 2011 (
Nevada)
Stygobromus allegheniensis (Holsinger, 1967) (
New York to
West Virginia)
Stygobromus ambulans (F. Müller, 1846)
Stygobromus anastasiae Sidorov, Holsinger & Takhteev, 2010 (
Siberia, Russia)
Stygobromus apscheronia (Derzhavin, 1945) (
Azerbaijan)
Stygobromus araeus (Holsinger, 1969)

(
Virginia,
North Carolina)
Stygobromus arizonensis Holsinger, 1974

(
Arizona)
Stygobromus balconis (Hubricht, 1943)

(
Texas)
Stygobromus baroodyi Holsinger, 1978 (
Virginia)
Stygobromus barri (Holsinger, 1967)

(
Missouri)
Stygobromus barryi Holsinger, 1978 (
Tennessee)
Stygobromus behningi (Birstein, 1948)
Stygobromus bifurcatus (Holsinger, 1967)

(
Texas)
Stygobromus biggersi Holsinger, 1978 (
Virginia to
Pennsylvania)
Stygobromus blinni Wang & Holsinger, 2001
Stygobromus borealis Holsinger, 1978 (
Vermont,
New York)
Stygobromus boultoni Wang & Holsinger, 2001
Stygobromus bowmani (Holsinger, 1967)

(
Oklahoma)
Stygobromus canadensis Holsinger, 1980 (
Alberta, Canada)
Stygobromus carolinensis Holsinger, 1978 (
North Carolina)
Stygobromus chamberlaini Ellis, 1941
Stygobromus cherylae Wang & Holsinger, 2001
Stygobromus clantoni (Creaser, 1934)

(
Kansas,
Missouri)
Stygobromus coeca (Dobraenu & Manolache, 1951)
Stygobromus coloradensis Ward, 1977
Stygobromus conradi (Holsinger, 1967)

(
Virginia)
Stygobromus cooperi (Holsinger, 1967)

(
West Virginia)
Stygobromus cowani Wang & Holsinger, 2001
Stygobromus culveri Holsinger, 1978 (
West Virginia)
Stygobromus cumberlandus Holsinger, 1978 (
Virginia)
Stygobromus curroae Wang & Holsinger, 2001
Stygobromus dejectus (Holsinger, 1967)

(
Texas)
Stygobromus dentata (Hubricht, 1943)
Stygobromus dershavini (Behning, 1928)
Stygobromus dicksoni Holsinger, 1978 (
Alabama,
Georgia)
Stygobromus donensis (Martynov, 1919)
Stygobromus duplus Wang & Holsinger, 2001
Stygobromus elatus (Holsinger, 1967)

(
Arkansas)
Stygobromus elliotti Holsinger, 1974
Stygobromus emarginatus (Hubricht, 1943)

(
Maryland,
West Virginia)
Stygobromus ephemerus (Holsinger, 1969)

(
Virginia)
Stygobromus estesi Holsinger, 1978 (
Virginia)
Stygobromus exilis Hubricht, 1943
Stygobromus fecundus Holsinger, 1978 (
Tennessee)
Stygobromus fergusoni Holsinger, 1978 (
Virginia)
Stygobromus finleyi Holsinger, 1978 (
Tennessee)
Stygobromus flagellatus (J. E. Benedict, 1896)

(
Texas)
Stygobromus fontinalis Wang & Holsinger, 2001
Stygobromus franzi Holsinger, 1978 (
Maryland)
Stygobromus gallawayae Wang & Holsinger, 2001
Stygobromus glacialis Wang & Holsinger, 2001
Stygobromus gracilipes (Holsinger, 1967) (
Virginia to
Pennsylvania)
Stygobromus gradyi Holsinger, 1974

(
California)
Stygobromus grahami Holsinger, 1974
Stygobromus grandis Holsinger, 1978 (
Georgia)
Stygobromus hadenoecus (Holsinger, 1966)

(
Texas)
Stygobromus harai Holsinger, 1974

(
California)
Stygobromus hayi (Hubricht & Mackin, 1940)

(
District of Columbia)
Stygobromus herbsti Wang & Holsinger, 2001
Stygobromus heteropodus Hubricht, 1943

(
Missouri)
Stygobromus hoffmani Holsinger, 1978 (
Virginia)
Stygobromus holsingeri Ward, 1977
Stygobromus hubbardi Holsinger, 2009
Stygobromus hubbsi Shoemaker, 1942

(
Oregon)
Stygobromus hyporheicus Wang & Holsinger, 2001
Stygobromus hyrcana (Dershavin, 1939)
Stygobromus idahoensis Wang & Holsinger, 2001
Stygobromus imperialis Wang & Holsinger, 2001
Stygobromus indentatus (Holsinger, 1967)

(
Maryland,
North Carolina and
Virginia)
Stygobromus inexpectatus Holsinger, 1978 (
Alabama)
Stygobromus interitus Holsinger, 1978 (
Virginia)
Stygobromus intermedia (Dobreanu, Manolache & Piascariu, 1952)
Stygobromus interstitialis Wang & Holsinger, 2001
Stygobromus iowae Hubricht, 1943
Stygobromus jakutana (Martynov, 1931)
Stygobromus jemezensis Wang & Holsinger, 2001
Stygobromus johanseni (Shoemaker, 1920)
Stygobromus kazakhstanica Kulkina, 1992
Stygobromus kenki Holsinger, 1978 (
District of Columbia,
Virginia)
Stygobromus lacicolus Holsinger, 1974
Stygobromus lanensis Wang & Holsinger, 2001
Stygobromus latus Wang & Holsinger, 2001
Stygobromus leensis Holsinger, 1978 (
Virginia)
Stygobromus lepida (Mateus & Mateus, 1991)
Stygobromus levanidovae (G. Karaman, 1991)
Stygobromus limbus Wang & Holsinger, 2001
Stygobromus longidactylus (S. Karaman, 1929)
Stygobromus longipes (Holsinger, 1966)

(
Texas)
Stygobromus lucifugus (Hay, 1882)

(
Illinois)
Stygobromus mackenziei Holsinger, 1974

(
California)
Stygobromus mackini Hubricht, 1943 (
Tennessee to
West Virginia)
Stygobromus meschtscherica (Borutsky, 1929)
Stygobromus mikhaili Sidorov, Holsinger & Takhteev, 2010 (
Siberia, Russia)
Stygobromus minutus Holsinger, 1978 (
Georgia)
Stygobromus montanensis Holsinger, 1974 (
Montana)
Stygobromus montanus (Holsinger, 1967)

(
Arkansas)
Stygobromus morrisoni (Holsinger, 1967)

(
Virginia,
West Virginia)
Stygobromus mundus (Holsinger, 1967)

(
Virginia)
Stygobromus myersae Wang & Holsinger, 2001
Stygobromus mysticus Holsinger, 1974
Stygobromus nanus Holsinger, 1978 (
West Virginia)
Stygobromus nortoni (Holsinger, 1969)

(
Tennessee)
Stygobromus obrutus Holsinger, 1978 (
Virginia)
Stygobromus obscurus Holsinger, 1974
Stygobromus onondagaensis (Hubricht & Mackin, 1940)

(
Arkansas,
Kansas,
Missouri and
Oklahoma)
Stygobromus oregonensis Holsinger, 1974 (
Oregon)
Stygobromus ozarkensis (Holsinger, 1967)

(
Arkansas,
Missouri and
Oklahoma)
Stygobromus parvus (Holsinger, 1969)

(
West Virginia)
Stygobromus pecki (Holsinger, 1967)

(
Texas)
Stygobromus pennaki Ward, 1977
Stygobromus philareti (Birstein, 1948)
Stygobromus phreaticus Holsinger, 1978 (
Virginia)
Stygobromus pizzinii (Shoemaker, 1938)

(
District of Columbia,
Maryland,
Pennsylvania and
Virginia)
Stygobromus pollostus Holsinger, 1978 (
Virginia)
Stygobromus pseudospinosus Holsinger, 1978 (
Virginia)
Stygobromus putealis (Holmes, 1909)

(
Wisconsin)
Stygobromus puteanus Holsinger, 1974
Stygobromus quatsinensis Holsinger & Shaw, 1987
Stygobromus rallus Wang & Holsinger, 2001
Stygobromus redactus Holsinger, 1978 (
West Virginia)
Stygobromus reddelli (Holsinger, 1966)

(
Texas)
Stygobromus rudolphi Wang & Holsinger, 2001
Stygobromus russelli (Holsinger, 1967) (
Texas)
Stygobromus saltuaris Wang & Holsinger, 2001
Stygobromus secundus Bousfield & Holsinger, 1981
Stygobromus sheldoni Holsinger, 1974
Stygobromus sierrensis Holsinger, 1974
Stygobromus simplex Wang & Holsinger, 2001
Stygobromus smithi Hubricht, 1943

(
Alabama)
Stygobromus sparsus Holsinger, 1978 (
Tennessee)
Stygobromus spinatus (Holsinger, 1967)

(
West Virginia)
Stygobromus spinosus (Hubricht & Mackin, 1940) (
Virginia)
Stygobromus stegerorum Holsinger, 1978 (
Virginia)
Stygobromus stellmacki (Holsinger, 1967)

(
Pennsylvania)
Stygobromus subtilis (Hubricht, 1943)

(
Illinois,
Michigan and
Missouri)
Stygobromus tahoensis Holsinger, 1974
Stygobromus tenuis (S. I. Smith, 1874) (
Connecticut to
Maryland)
Stygobromus trinus Wang & Holsinger, 2001
Stygobromus tritus Holsinger, 1974
Stygobromus urospinatus Wang & Holsinger, 2001
Stygobromus utahensis Wang & Holsinger, 2001 (
Utah)
Stygobromus vitreus Cope, 1872
Stygobromus wahkeenensis Wang & Holsinger, 2001
Stygobromus wardi Wang & Holsinger, 2001
Stygobromus wengerorum Holsinger, 1974

(
California)