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REVSYS: SYSTEMATICS OF THE
SCORPION FAMILY VAEJOVIDAE
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FAMILY VAEJOVIDAEGenus ParavaejovisGenus Paruroctonus

boreus infragroup
   boreus
microgroup

     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
boreus infragroup
   boreus
microgroup

     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?

baergi microgroup

Diagnosis:
Haradon (
1984a):

A species group of nominate subgenus Paruroctonus (subgenus diagnosed by absence of short intercarinal setae ventrally on metasomal segments I-IV) differentiated by the combination of: carapace length/cheliceral fixed digit length ratio greater than 7.0; basitarsus II without mrs seta (Figs. 1, 5, 25, 31); pedipalpal primary denticles on fixed and movable fingers in six rows, denticles in rows 1-5 total 25-44 on fixed finger, 35-57 on movable finger; pectinal teeth in males 23-29 (except one population of P. baergi with low of 20), females 17-22 (except several populations of P. baergi with lows 13-15); pedipaip palm carinae well developed and granular in both sexes, most intercarinal surfaces conspicuously concave (similar to Paruroctonus mesaensis Stahnke, shown in Soleglad 1973: fig. 7); pedipalp movable finger length/palm length ratio between 1.0 and 1.3 in both sexes.

Group description. - Total adult length 35-50 mm; adult carapace length 4.0-6.3 mm in males, 5.0-6.5 mm in females; uniformly pale yellow, fuscous markings absent except very rarely in immatures; anterior margin of carapace straight to convex; pedipalpal macrosetae include four on dorsal surface of humerus, four on internal surface of brachium; trichobothria typical of genus in number, general distribution as in P. utahensis (see Sissom and Francke 1981: figs. 1-6); mrs seta present on basitarsi III-IV (except absent III in one subspecies), absent on I-II; telotarsus III with two to four retrosuperior setae; telotarsi I-IV with 1,1,2-3,2-4 retroinferior setae, and 2,2,2,2 retroinferior terminal setae.

Distribution: Amargosa Desert of Nevada and Mojave Desert of California, southward along the Colorado River drainage in California and Arizona, into northwestern Sonora; upper Colorado River drainage in Utah and Arizona; upper Rio Grande drainage in New México, western Texas and northern Chihuahua. (Haradon 1984a)

Included taxa: 

Paruroctonus baergi (Williams and Hadley, 1967)
Paruroctonus utahensis
(Williams, 1968)
Paruroctonus arenicola
Haradon (
1984)
     Paruroctonus arenicola arenicola Haradon (1984)
     Paruroctonus arenicola nudipes
Haradon (
1984)
Paruroetonus marksi
Haradon (
1984)

Key:

KEY TO THE SPECIES AND SUBSPECIES OF THE PARUROCTONUS BAERGI GROUP
(from Haradon 1984a)

1.  Telotarsus III with two retrosuperior setae (Fig. 12) .............................................. P. marksi

      Telotarsus III with three or four retrosuperior setae (Figs. 9-11)........................................ 2

2.  Telotarsus III with three long, and possibly one shorter subdistal, retrosuperior setae
     (Fig. 11); metasomal segment IV with five pairs of ventrolaterai setae; humerus with four
      medial macrosetae on distal 3/5 of external surface (Fig. 16) ......................P. arenicola...3

      Telotarsus III with four long retrosuperior setae; metasomal segment IV with four  
      pairs of ventrolateral setae; humerus with two or three medial macrosetae on distal
      3/5 of external surface (Fig. 14)..................................................................................................4

3.  Basitarsus III with mrs seta present (Figs. 27-28); paired dorsal metasomal setae 1,2,2-3,
     3-4 ........................................................................................................... P. arenicola arenicola

      Basitarsus III without mrs seta (Figs. 29-30); paired dorsal metasomal setae 0,1,1,2
       .................................................................................................................. P. arenicola nudipes

4.  Telotarsus III with one retromedial seta (Fig. 9); ventrolateral metasomal carinae I-III
      smooth; closed pedipalp Fingers in adult male form wide proximal gap (Fig. 17)...........
      ........................................................................................................................................ P. baergi

     Telotarsus III with two retromedial setae (Fig. 113); ventrolateral metasomal carinae
      I-III granular; dosed pedipalp fingers in adult male form narrow proximal gap (Fig.19)
      ................................................................................................................................... P. utahensis

Notes: Comparisons (Haradon 1984a): Species belonging to the partly sympatric (Mojave and Colorado Deserts) species group surrounding Pamroctonus borregoensis Williams, 1972, have the pedipalpal primary denticles in rows 1-5 totalling 28 or fewer (rarely more) on fixed finger, 36 or fewer on movable finger; pectinal teeth in males 22 or fewer (except in two undescribed species), in females 16 or fewer (except in one undescribed species); pedipalp palm in adult females with weakly developed and essentially smooth carinae, intercarinal surfaces in both sexes flat or weakly concave to convex (similar to that shown for Paruroctonus luteolus (Gertsch and Suleglad, 1966) in Soleglad 1973: fig. 8); pedipalp movable finger length/palm length ratio in adult males less than 1.0 (except in about 15 percent of P. luteolus).
Paruroctonus xanthus
(Gertsch and Solegiad, 1966), which occurs within the southern range of P. baergi has seven rows of pedipalpal primary denticles on the movable finger, denticles in rows 1-5 totalling on fixed finger more than 80, in rows 1-6 on movable finger more than 90; pedipalp movable finger length/palm length ratio greater than 1.3 in both sexes; pedipalp fingers multiscalloped in both sexes (see Gertsch and Solegiad 1966: fig. 32); six to seven retrosuperior setae on telotarsus III.
All other species in the subgenus Paruroctonus have a distinctly differentiated mrs seta on basitarsus II.

 


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