Tribe Omaliini W.S. MacLeay, 1825
0007. Acrolocha Thomson, 1858: 38
Type species: Omalium striatum Gravenhorst, 1802
Elonium Leach in Samouelle, 1819: 175 [invalid, rejected by ICZN 1993: 164 (Opinion 1722)]
Type species: Omalium striatum Gravenhorst, 1802
Only one species is known in this genus from Central America.
Characters/Description: Navarrete-Heredia et al. 2002: 34 (characters in key); Thayer 2003: 315 (characters in key).
Distribution.
Central America: Mexico.
Other regions: Nearctic, Palaearctic.
0008. Crymus Fauvel, 1904a: 92
Type species: Crymus antarcticus Fauvel, 1904
Arpediomimus Cameron, 1917a: 277 [synonymized by Steel 1970: 240]
Type species: Arpediopsis falklandicus Cameron, 1917
Arpediopsis Cameron, 1917b: 124 [synonymized by Steel 1970: 240]
Type species: Arpediopsis falklandicus Cameron, 1917
Only one species is known in this genus from South America and Falkland Isl.
Characters/Description: Steel 1964: 348 (characters).
Key: Steel 1964: 349 (species of genus).
Distribution.
South America: Argentina, Falkland Isl.
Other regions: Australian, Antarctic.
0009. Dropephylla Mulsant & Rey, 1880: 242 (Fig. 8)
Type species: Omalium lucidum Erichson, 1839
Only one species is known from Central America.
Characters/Description: Navarrete-Heredia et al. 2002: 35 (characters in key); Thayer 2003: 315 (characters in key).
Distribution.
Central America: Mexico.
Other regions: Nearctic, Palearctic, Oriental.
0010. Ischnoderus Fauvel, 1867: 46
Type species: Omalium insigne Fairmaire & Germain, 1862
Subgenera:
Ischnoderus Fauvel, 1867: 46 [*]
Type species: Omalium insigne Fairmaire & Germain, 1862
Walkerellus Bernhauer, 1939d: 203 Type species: Ischnoderus paradoxus Bernhauer, 1939
2 species are included in this genus from South America.
Characters/Description: Coiffait & Sáiz 1968: 448 (characters in key), 454 (characters).
Distribution.
South America: Chile, Argentina.
Other regions: Australian.
0011. Omaliopsis Jeannel, 1940: 118
Type species: Omalium africanum Fauvel, 1907
3 species are included in this genus from Central and South America.
Characters/Description: Coiffait & Sáiz 1968: 449 (characters in key), 451 (characters); Navarrete-Heredia et al. 2002: 35 (characters in key); Thayer 2003: 315 (characters in key).
Distribution.
Central America: Mexico.
South America: Chile, Argentina.
Other regions: Nearctic, Ethiopian, Madagascan, Oriental, Australian.
0012. Omalium Gravenhorst, 1802: 111 (Fig. 9)
Type species: Staphylinus rivularis Paykull, 1789
Homalium Ljungh, 1804: 74 [synonymized by Blackwelder 1952: 188]
Type species: Staphylinus rivularis Paykull, 1789
Homalium Agassiz, 1846: 258 [synonymized by Blackwelder 1952: 188]
Type species: Staphylinus rivularis Paykull, 1789
Homalium Gemminger & Harold, 1868: 665 [synonymized by Blackwelder 1952: 189]
Type species: Staphylinus rivularis Paykull, 1789
Ochthexenus Motschulsky, 1860b: 546 [synonymized by Fauvel 1869: 493]
Type species: Staphylinus rivularis Paykull, 1789
10 species are included in this genus from Latin America.
Characters/Description: Blackwelder 1943: 53 (characters); Navarrete-Heredia et al. 2002: 34 (characters in key); Thayer 2003: 315 (characters in key).
Key: Blackwelder, 1943: 54 (species of the West Indies).
Distribution.
West Indies: Cuba, Jamaica, Haiti, Dominican Republic.
Central America: Mexico, Guatemala, Honduras, El Salvador.
South America: Bolivia, Chile, Argentina.
Other regions: Nearctic, Palaearctic, Ethiopian, Madagascan, Oriental, Australian.
0013. Phloeonomus Heer, 1839: 184 (Fig. 10)
Type species: Omalium pusillum Gravenhorst, 1806
Subgenera:
Phloeonomodes Smetana, 1964: 163, 168
Type species: Omalium minimus Erichson, 1839
Phloeonomus Heer, 1839: 184 [*]
Type species: Omalium pusillum Gravenhorst, 1806
13 species are included in this genus from Latin America.
Characters/Description: Blackwelder 1943: 51 (characters); Navarrete-Heredia et al. 2002: 34 (characters in key); Thayer 2003: 315 (characters in key).
Distribution.
West Indies: Cuba, Jamaica, Dominican Republic, Puerto Rico, Guadeloupe, Grenada, Trinidad-Tobago.
Central America: Mexico, Guatemala, Honduras, Nicaragua, Costa Rica, Panama.
South America: Colombia, Venezuela, Brazil, Argentina.
Other regions: Nearctic, Palaearctic, Ethiopian, Madagascan, Oriental, Australian, Oceanic.
0014. Phyllodrepa Thomson, 1859: 52 (Fig. 11)
Type species: Staphylinus floralis Paykull, 1789
5 species are included in this genus from South America.
Distribution.
South America: Venezuela, Peru, Argentina.
Other regions: Nearctic, Palaearctic, Oriental, Australian.
0015. Xenanthobium Coiffait & Sáiz, 1968: 452
Type species: Anthobium andicola Fauvel, 1867
Only one species is known from and is restricted to South America.
Characters/Description: Coiffait & Sáiz 1968: 448 (characters in key).
Distribution.
South America: Chile.
0016. Xylodromus Heer, 1839: 174
Type species: Omalium depressum Gravenhorst, 1802
Drephopylla Fiori, 1900: 90, 93 [synonymized by Luze 1906: 493]
Type species: Omalium depressum Gravenhorst, 1802
Etheothassa Thomson, 1858: 38 [synonymized by Luze 1906: 493]
Type species: Omalium deplanatum Gyllenhal, 1810
Omalissus Broun, 1893: 1042 [synonymized by Cameron 1945b: 782]
Type species: Omalissus castaneus Broun, 1893
3 species are included in this genus from Central and South America.
Characters/Description: Navarrete-Heredia et al. 2002: 34 (characters in key), 35 (characters in key as Dropephylla); Thayer 2003: 315 (characters in key), 315 (characters in key as Dropephylla).
Distribution.
Central America: Mexico.
South America: Venezuela, Chile.
Other regions: Nearctic, Palaearctic, Australian.