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FAMILY VAEJOVIDAEGenus ParavaejovisGenus Paruroctonus

boreus infragroup

     Paruroctonus arnaudi
     Paruroctonus bantai
          Paruroctonus bantai bantai
          Paruroctonus bantai saratoga
     Paruroctonus boreus
     Paruroctonus maritimus
     Paruroctonus silvestrii
     Paruroctonus variabilis
   becki microgroup
     Paruroctonus becki
   xanthus microgroup
     Paruroctonus xanthus
   baergi microgroup
     Paruroctonus arenicola
          Paruroctonus arenicola arenicola
          Paruroctonus arenicola nudipes
     Paruroctonus baergi
     Paruroctonus boquillas
     Paruroctonus marksi
     Paruroctonus utahensis
gracilior infragroup
     Paruroctonus gracilior
stahnkei infragroup
   stahnkei microgroup
     Paruroctonus stahnkei
   shulovi microgroup
     Paruroctonus shulovi
          Paruroctonus shulovi shulovi
          Paruroctonus shuvoli nevadae
     Paruroctonus simulatus
   borregoensis microgroup
     Paruroctonus ammonastes
     Paruroctonus bajae
     Paruroctonus borregoensis
          Paruroctonus b. borregoensis
          Paruroctonus b. actites
     Paruroctonus hirsutipes
     Paruroctonus luteolus
     Paruroctonus nitidus
     Paruroctonus pseudopumilis
     Paruroctonus surensis
     Paruroctonus ventosus
   williamsi microgroup
     Paruroctonus pecos
     Paruroctonus williamsi

Genus PseudouroctonusGenus Serradigitus
Genus Smeringerus
Genus Syntropis
Genus Uroctonites
Genus Uroctonus
Genus Vaejovis
Genus Vejovoidus

Catalog of the VaejovidaeVaejovid  Bibliography

Why study vaejovids?

Paruroctonus xanthus (Gertsch & Soleglad 1966)

Vejovis (Paruroctonus)) xanthus ►Gertsch & Soleglad, 1966: 34.
Paruroctonus xanthus: Williams, 1972: 3; Soleglad, 1973b: 355; Williams, 1976: 2; ►Williams, 1980: 32, 46, fig. 36E, 37E; Haradon, 1984a: 210; Haradon, 1984b: 318; Haradon, 1985: 24, 40; Kovarík, 1998: 144; Beutelspacher, 2000: 70, 136, 146, 152, map 42; Sissom, 2000:508-509.

type(s):  Vejovis (Paruroctonus) xanthus Gertsch & Soleglad female holotype from 13 miles (21 km) west of Winterhaven, Imperial County, California, USA, June 13, 1958 (V. Roth). Deposited in the American Museum of Natural History.

original description:
Gertsch & Soleglad 1966:

DIAGNOSIS: Pale scorpion resembling auratus and mesaensis in appearance and sharing features of both. Median eyes of medium size and set well in advance of center of carapace. Cauda stout and bearing only up to five pairs of setae on inferior median keels. Telson long and slender and bearing a long, lightly curved sting. Pedipalps resembling those of mesaensis, but stout fingers proportionately longer and more deeply scalloped.
COLORATION: Entire body pale yellow to golden orange, without contrasting markings except as follows: Lateral eyes and small tubercles black. Median eyes and most of tubercles black. Articulation spots on appendages red. Tip of sting red. Dark setae on appendages with reddish tinge.
STRUCTURE: Similar to that of boreus except as noted below. Measurements given in table 5.
Carapace: Anterior margin essentially straight (fig. 19), set with six short setae; sides gently scalloped; width at rounded caudal margin equal to length. Median eyes well in front of middle of carapace, of medium size, set on small elevated tubercles; width of median diad about one-fourth of width of carapace at that point (23/96). Granulation inconspicuous because of pale color but heavier than that of boreus.
Preabdomen: Smooth, shining, with quite typical armature of granules as in boreus.
Cauda: Stouter than that of boreus but sculptured essentially as in that species. Dorsal and superior lateral keels prominent, crenulate, with rounded or pointed granules. Inferior lateral keels distinct on all segments, weakly denticulate on segment I, nearly smooth, with scattered denticles, on segment II, smooth, with more numerous denticles, on segment III, quite regularly denticulate on segment IV, and evenly set with pointed granules on segment V. Inferior median keels of segments I-III distinct but smooth, of segment IV with granules in distal fifth of length; single median keel of segment V with closeset series of sharp granules. Segments I-IV with 3-4-4-5 pairs of setae on median keels.
Telson: Details as shown in figure 71. Vesicle slender, quite smooth, set with fine bristles; sting long, moderately curved; subaculear nodule of medium development.
Pectines: Similar to those of boreus. Pectinal teeth 21/22.
Chelicerae: Similar to those of boreus. Lower margin of fixed finger with two nodules near base. Lower margin of movable finger with keel dissected into six or seven irregularly formed denticles. Apical tooth on lower margin of movable finger stout, nearly equal to opposing apical tooth.
Pedipalps: Similar to those of mesaensis, with smaller and stout, long fingers as shown in figure 32. All carinae conspicuous and set with quite coarse, pale granules. Inner keels of fingers quite deeply scalloped.
Walking legs: First to third protarsi with regular series of nine to 12 long, stout bristles on dorsal surface; fourth protarsus with five scattered bristles.

subsequent accounts:
Williams (1980):

Diagnosis. Adults to 65 mm long. Entire body  pale yellow to golden-orange, lacking contrasting dark color markings. Metasoma with distinct ventrolateral keels on all segments, these weakly denticulate on segment I, nearly smooth with few scattered denticles on II, smooth with more numerous denticles on III, regularly denticulate on IV; metasoma with ventromedian keels of segments I-III distinct but smooth, segment IV with granules along distal fifth of keels: space between ventromedian keels not hirsute: pectine teeth 19-23 in females, 28-32 in males: chelicerae with ventral margin of fixed finger armed with two small denticles near base; ventral margin of movable finger of chelicerae with 6 or 7 irregularly formed denticles; pedipalps with relatively long fingers, fixed finger longer than palm, movable finger longer than carapace or metasomal segment V; pedipalp palm with granular keels.
Similar to P. mesaensis and P. auratus. Differs from P. mesaensis as follows: lack of abundant bristles between ventromedian keels of metasoma; metasomal segment I approximately as long as wide (not longer than wide); fixed finger of pedipalp distinctly longer than palm or metasomal segment V. Differs from P. auratus as follows: pedipalp fixed finger longer than carapace or metasomal segment V.

distribution: NORTH AMERICA. México (Sonora), USA (California). Per Williams (1980): "Sand dunes where borders of Baja California, California, and Arizona intersect. Never reported from Baja California, but probably occurs there."  View Map

published records:  Sonora, Mexico: 42 km E San Luis, 4-VI-1968 (Cazier, Bigelow. Davidson).



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