REVSYS: SYSTEMATICS OF THE
SCORPION FAMILY VAEJOVIDAE
HomeScorpionsVaejovidaeThe ProjectActivities/Products AcknowledgmentsLinks

FAMILY VAEJOVIDAEGenus ParavaejovisGenus Paruroctonus

boreus infragroup
   boreus
microgroup

     Paruroctonus arnaudi
     Paruroctonus bantai
          P. bantai bantai
          P. bantai saratoga
     Paruroctonus boreus
     Paruroctonus maritimus
     Paruroctonus silvestrii
     Paruroctonus variabilis
   becki microgroup
     Paruroctonus becki
   xanthus microgroup
     Paruroctonus xanthus
   baergi microgroup
     Paruroctonus arenicola
          P. arenicola arenicola
          P. arenicola nudipes
     Paruroctonus baergi
     Paruroctonus boquillas
     Paruroctonus marksi
     Paruroctonus utahensis
gracilior
infragroup
     Paruroctonus gracilior
stahnkei
infragroup
   stahnkei
microgroup

     Paruroctonus stahnkei
   shulovi microgroup
     Paruroctonus shulovi
          P. shulovi shulovi
          P. shuvoli nevadae
     Paruroctonus simulatus
   borregoensis microgroup
     Paruroctonus ammonastes
     Paruroctonus bajae
     Paruroctonus borregoensis
          P. borregoensis borregoensis
          P. borregoensis actites
     Paruroctonus hirsutipes
     Paruroctonus luteolus
     Paruroctonus nitidus
     Paruroctonus pseudopumilis
     Paruroctonus surensis
     Paruroctonus ventosus
   williamsi microgroup

    
Paruroctonus coahuilanus
     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?

stahnkei infragroup

Diagnosis: Diagnosis.—An infragroup of nominate subgenus Paruroctonus differentiated by combination of: (1) cheliceral fixed digit with inferior carina extending proximally at least to level of bicusp (see Gertsch and Soleglad 1966:  fig. 36); (2) cheliceral movable digit with superior distal tine essentially triangular or elongate and curved, inferior distal tine length/superior distal tine length ratio 3 .0 or less; (3) carapace length/cheliceral fixed digit length ratio 4.2-8.0; (4) basitarsus III with six or more superior seta, arranged in distal plus proximal rows (4+2 to 6+2) or in essentially single file; (5) pectinal teeth in males 13-23 (except 26-27 in one new species; rarely 24 in P. stahnkei or P. simulatus, n. sp.), females 8-17 (except 18 in one new species); (6) pedipalp movable finger length/palm length ratio in adult males 0.8-1.0 (except 1.0-1.1 in shulovi microgroup), adult females 1 .0-1.1 ; (7) carapace length/pectine length ratio in adult males 1 .0-1 .2, adult females 1.5-2 .2 (except 1.4-1.5 in P. stahnkei, and 1.4 in shulovi microgroup); (8) humerus with two inframedial macrosetae on proximal 3/5 of internal surface (except two to three in shulovi microgroup); (9) pedipalp primary denticles, excluding proximal row, total 17-47 on fixed finger, 22-57 on movable finger; (10) adult carapace length generally 3 .0-5.0 mm in males, 3.5-5.5 mm in females.

Distribution:  Western and southern Great Basin southward into northern Baja California Sur, northwestern Sonora and Chihuahuan Desert.

Included taxa: 

Subordinate taxa.—The stahnkei infragroup comprises four primarily allopatric elements, differentiated as follows and in Table 5 .

STAHNKEI MICROGROUP. Diagnosis: combination of carapace length/ cheliceral fixed digit length ratio 4.2-5.0; telotarsi II-IV with one retroinferior terminal seta (similar to Fig . 16). Distribution: Northern Sonoran Desert. Included species : P. stahnkei (Gertsch and Soleglad, 1966) .

SHULOVI MICROGROUP . Diagnosis : combination of carapace length/ cheliceral fixed digit length ratio 7 .0-8 .0 ; basitarsus II with mrs seta . Distribution: Western and southern Great Basin. Included taxa: P. shulovi (Williams, 1970); P. shulovi nevadae, n. ssp.; P. simulatus, n. sp.

BORREGOENSIS MICROGROUP. Diagnosis: basitarsus II without mrs seta. Distribution: Southern Great Basin, southward into northwestern Sonora and northern Baja California Sur. Included species: This microgroup, named after P. borregoensis Williams, 1972, is discussed in detail by Haradon (1984b).

WILLIAMSI MICROGROUP. Diagnosis : combination of carapace length/cheliceral fixed digit length ratio 4 .8-5 .8 ; telotarsi II-IV with two retroinferior terminal setae. Distribution: Chihuahuan Desert. Included species: P. williamsi Sissom and Francke, 1981; P. pecos Sissom and Francke, 1981; P. coahuilanus, n. sp .

Key:  

Table 5. - Distribution and diagnostic characteristics of the four microgroups constituting the stahnkei infragroup of the nominate subgenus Paruroctonus.
Character stahnkei williamsi shulovi borregoensis
Desert region Sonoran Chihuahuan Great Basin Mojave to Vizcaino

Cheliceral fixed digit, inferior denticles
(A) absent (B) present

A A B B
Pedipalp movable finger length/palm length, adult male 1 .0 0.9-1.0 1.0-1.1 0.8-1.0
Pedipalp primary denticles,
rows on movable finger
less proximal row, fixed finger
                                     movable finger  

7
37-47
43-57

6-7
27-34
33-43

6
24-34
34-44

6
17-30
22-38
Pedipalp fingers, adult male:
(A) unscalloped, (B) scalloped
A A B A,B
Pedipalp palm carinae, adult female
 (A) granular (B) smooth
A B A B
Humeral internal inframedial macrosetae 2 2 2-3 2
Basitarsus II mid-retrosuperior seta (A) present, (B) absent A A A B
Telotarsi II-IV retroinferior terminal setae 1 2 1-2 2
Carapace length/pectine length 1-4-1.5 1.6 1.4 1.5-2.2

Notes:
Comparisons: the gracilior infragroup (above) differs primarily in characters 1-4, but also significantly in 5-10 ; the boreus infragroup (above) differs primarily in character 5, but also significantly in 6-10. Specimens with pectinal tooth counts exceeding 23/24 in males or 17/17 in females (see Haradon, 1984b) have 34 or fewer primary denticles on pedipalp movable finger; all species in the boreus infragroup have 35 or more primary denticles on the movable finger. Distribution.—Western and southern Great Basin, southward into Sonoran Desert and Baja California Sur; also Chihuahuan Desert. Key Hsradon 1985 Cheliceral fixed digit inferior carina extends proximally at least to level of bicusp; carapace length/cheliceral fixed digit length ratio 4 .2 or more; Pectinal teeth 23/24 or fewer in males and 17/17 or fewer in females and 36 or fewer primary denticles (less proximal row) on pedipalp movable fingers, or either (1) more pectinal teeth, or (2) more primary denticles but dorsal metasomal setae I-IV 0,1,1,1 or more and mrs seta on basitarsus II ………..stahnkei infragroup

 

 


The material included in this site is based upon work supported by the National Science Foundation under Grant No. 0413453.  Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
THE UNAUTHORIZED COPYING, DISPLAYING OR OTHER USE OF PHOTOGRAPHS OR OTHER CONTENT  FROM THIS SITE IS A ILLLEGAL. 
© Copyright 2005-2006.  All images in this site, even if they do not include an individual statement of copyright, are protected under the U. S. Copyright Act.  They may not be "borrowed" or otherwise used without our express permission or the express permission of the photographer(s),  artist(s), or author(s).  For permission, please submit your request to wsavary@yahoo.com.