« BACK TO KEY

Checklist of the Families and Genera of North American Scorpions

  •  
  1. BUTHIDAE Simon, 1879.
    1. Centruroides Marx in Howard, 1890.
      Distribution: California, Nevada, Utah, Arizona, Colorado, New Mexico, Nebraska, Kansas, Oklahoma, Texas, Missouri, Arkansas, Louisiana, Tennessee, Mississippi, Georgia, Florida; all of Mexico.
      Number of species: 21. Additional species in Central America and the Antilles.
      References: See Stahnke & Calos (1977) for a key to the species of this genus.
    2. Tityus Koch, 1836.
      Distribution: Does not occur naturally in the United States or Mexico but is included here because it is an occasional stowaway on produce from South America.
      Number of species: None.
    3. Darchenia Vachon, 1977.
      Distribution: Yucatan, Mexico. Closely resembles Old World genera and may not be a natural part of the North American fauna.
      Number of species: 1.
      References: Vachon (1977).
  2. CHACTIDAE Pocock, 1893.
    1. Nullibrotheas Williams,1974.
      Distribution: Baja California Sur.
      Number of species: 1.
      References: See Williams (1974, 1980).
  3. EUSCORPIIDAE Laurie, 1896.
    1. Troglocormus Francke, 1982.
      Distribution: Tamaulipas, San Luis Potosi.
      Number of species: 2.
      References: See Francke (1982a).
    2. Megacormus Karsch, 1881.
      Distribution: Tamaulipas, San Luis Potosi, Queretaro, Hidalgo, Veracruz, Oaxaca.
      Number of species: 3.
      References: See Soleglad (1976) for keys to the species of Megacormus and Plesiochactas.
    3. Plesiochactas Pocock, 1900.
      Distribution: Veracruz.
      Number of species: 1. One additional species known from Guatemala.
      References: See Soleglad (1976).
  4. SUPERSTITIONIDAE Stahnke, 1940.
    1. Superstitionia Stahnke, 1940.
      Distribution: California, Nevada, Arizona; Baja California, Baja California Sur, Sonora.
      Number of species: 1.
      References: See Williams (1980).
    2. Alacran Francke, 1982b1982.
      Distribution: Known only from very deep caves in northern Oaxaca.
      Number of species: 1.
      References: This genus and its phylogenetic position with respect to the other genera in this family are discussed by Francke (1982b).
    3. Sotanochactas Francke, 1986.
      Distribution: San Luis Potosi.
      Number of species: 1.
      References: See Francke (1986).
    4. Typhlochactas Mitchell, 1968.
      Distribution: Tamaulipas, San Luis Potosf, Veracruz, Oaxaca.
      Number of species: 5.
      References: See Mitchell (1968), Mitchell & Peck (1977), Francke (1982b), and Sissom (1989a).
  5. IURIDAE Thorell, 1876.
    1. Anuroctonus Pocock, 1893.
      Distribution: California, Idaho, Nevada, Utah, Arizona, New Mexico; Baja California.
      Number of species: 1.
      References: See Gertsch & Allred (1965) and Williams (1980).
    2. Hadrurus Thorell, 1876.
      Distribution: California, Oregon, Idaho, Nevada, Utah, Arizona; Baja California, Baja California Sur, Sonora, Guerrero, Puebla, Oaxaca.
      Number of species: 8.
      References: See Stahnke (1969), Williams (1970b, 1980), and Soleglad (1975).
  6. VAEJOVIDAE Thorell, 1876.
    1. Vaejovis Koch, 1836.
      Distribution: California, Nevada, Utah, Arizona, New Mexico, Texas, Kentucky, Tennessee, Mississippi, Alabama, Georgia, North Carolina, South Carolina; all of Mexico.
      Number of species: 70 .
      References: There are no comprehensive works dealing with all the species of this genus, which seems to be under constant revision. See Hoffmann (1931), Williams (1968, 1970c, 1971, 1976, 1980, 1986a), Francke (1977a), Sissom & Francke (1985), and Sissom (1986b, 1989b, 1989c, 1990b, 1991).
    2. Serradigitus Stahnke, 1974.
      Distribution: California, Nevada, Idaho, Utah, Arizona, Texas; Baja California, Baja California Sur, Sonora, Coahuila.
      Number of species: 21.
      References: The genus formerly comprised the Wupatkiensis group of Vaejovis. There is no key to all of the species of this genus, but Williams (1980) covers those of Baja California and Sissom & Stockwell (1992) cover those of Sonora, Mexico. See also Williams (1970a), Soleglad (1972, 1974), and Williams & Berke (1986).
    3. Syntropis Kraepelin, 1901.
      Distribution: Baja California Sur.
      Number of species: 1.
      References: See Williams (1980).
    4. Pseudouroctonus Stahnke, 1974.
      Distribution: California, Arizona, New Mexico, Texas; Baja California, Baja California Sur, Sonora, Chihuahua.
      Number of species: 17.
      References: This genus was resurrected by Stockwell (1992) and contains species formerly placed in the Minimus group of Vaejovis. See Gertsch & Soleglad (1972) and Hjelle (1972).
    5. Uroctonites Williams and Savary, 1991.
      Distribution: California, Arizona.
      Number of species: 4.
      References: See Williams & Savary (1991).
    6. Uroctonus Thorell, 1876.
      Distribution: Washington, Oregon, California.
      Number of species: 3.
      References: See Gertsch & Soleglad (1972), Williams (1986b), and Williams & Savary (1991).
    7. Paravaejovis Williams, 1980.
      Distribution: Baja California Sur.
      Number of species: 1.
      References: See Williams (1980).
    8. Paruroctonus Werner, 1934.
      Distribution: British Columbia, Alberta; Washington, Oregon, California, Idaho, Nevada, Utah, Arizona, Montana, Wyoming, Colorado, New Mexico, Nolth Dakota, Nebraska, Texas; Baja California, Baja California Sur, Sonora, Chihuahua, Coahuila, Aguascaliente.
      Number of species: 32.
      References: See Haradon (1984a, 1984b, 1985).
    9. Smeringurus Haradon, 1983.
      Distribution: California, Arizona, Baja California, Baja California Sur.
      Number of species: 4.
      References: This genus was raised from subgeneric rank by Stockwell (1992) See Haradon (1983).
    10. Vejovoidus Stahnke, 1974.
      Distribution: Baja California Sur.
      Number of species: 1.
      References: See Williams (1980).
  7. DIPLOCENTRIDAE Pocock, 1893.
    1. Bioculus Stahnke, 1968.
      Distribution: Baja California Sur.
      Number of species: 4.
      References: This genus was resurrected by Stockwell (1992) and contains species once placed in the genus Didymocentrus. See Williams (1980).
    2. Diplocentrus Peters, 1862.
      Distribution: Arizona New Mexico, Texas; all of Mexico except Baja California.
      Number of species: 22. There are additional species known from Central America.
      References: No comprehensive works on this genus exist, but works covering the known species include those of Stahnke (1970a, 1976, 1981), Francke (1975; 1977b, 1977c; 1978b), Sissom (1986a), Stockwell & Nilsson (1987), and Stockwell (1988).