Paruroctonus becki (Gertsch & Allred 1965)
Vejovis becki Gertsch & Allred, 1965: 2, 9-11,
fig. 1, 2, 4-7, 10, 20.
Vejovis (Paruroctonus) becki: ►Gertsch & Soleglad,
1966: 6, 47-52, fig. 39-41, 56, 59, 60, 65.
Paruroctonus becki:: Williams, 1972: 3; Soleglad, 1973b: 355;
Williams, 1976: 2; Hjelle, 1982: 98; ►Haradon, 1985: 24, 40; Kovarík,
1998: 143; Sissom, 2000:508; Soleglad & Fet, 2003a: 31.
Vejovis becki Gertsch & Allred 1965: Holotype: M (AMNH), Nevada Test
Site, approx. 34 mi N Mercury, Nye County, Nevada, USA.
Gertsch and Soleglad 1966
DIAGNOSIS: Resembling mesaensis in
lacking dark pattern on preabdomen and in having eyes of quite large
size. Quite slender hands and long fingers readily separating it from
that and most species in series. Chelicerae large and having distal
tooth on upper margin of movable finger of medium size, widely separated
from large apical tooth of lower margin. Male and female as shown in
figures 59 and 60.
COLORATION: Base color in both sexes yellow to bright orange-brown, but
legs and pectines pale yellow. Carapace (fig. 65)
typically with dark pattern as follows: Eyes and eye tubercles black;
dark central dusky patch enclosing median eyes and from it inconspicuous
dusky shadings radiating toward side eyes; central patch in some cases
limited to median eyes, with rest of carapace pale. Preabdomen and
cauda unmarked above or below; tip of sting dark
STRUCTURE: Similar to that of boreus in both sexes except as noted
below. Males smaller and more slender than females. Measurements given
in table 7.
Carapace: Shape of carapace of female from Nevada test site as shown in
figure 65. Anterior margin essentially straight, more rarely with gentle
curvature, set with six suberect setae.
Granulation as in boreus, most distinct in males.
Median eyes large, on conspicuous suboval tubercles; width of median
diad about one-third of width of carapace at this point, somewhat less
in a few specimens.
Cauda: Sculpturing essentially as in boreus. Segments I-IV with 4-5-5-5
pairs of setae on obsolete, inferior, median keels.
Telson: Sting moderately curved, shorter than quite smooth vesicle.
Subaculear nodule inconspicuous. Vesicle about as wide as segment V of
Pectines: Similar to those of boreus in both sexes. Those of female of
median width and length; middle lamellae consisting of about 20 small
oval pieces; pectinal teeth numbering from 17 to 21. Those of male much
larger and broader; middle lamellae about 30 small ovoid pieces;
pectinal teeth long, curved, numbering 24 to 29.
Chelicerae: Similar in both sexes (figs. 39-41) and most closely
resembling those of stahnkei and gracilior. Fixed finger with typical
dentition, with long, thin, apical spur, with faint indication of, or
completely lacking, rounded nodules on nearly obsolete lower margin.
Movable finger a very long, flat blade, bearing on upper margin five
teeth of which distal one is of medium size, well separated from
enlarged apical tooth of lower margin (fig. 40); carina of lower margin
crenulate, dissected into series of six to 12 pale teeth.
Pedipalps: In both sexes quite long, with hands of medium size and long
fingers. Femur about three times as long as broad, with all carinae
distinct and granulated. Tibia not fully three times as long as broad,
narrowed at base, inflated at center, with all carinae granulated. Chela
with all eight carinae low and set with small
granules. Inner keels essentially straight to lightly scalloped, with
small granules and teeth ar ranged as in boreus.
Walking legs: Protarsi of third legs with series
of about seven long setae.
key 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
24/24 or more in males and 17/18 or more in females and 37 or more primary
denticles (less proximal row) on pedipalp movable fingers, or if fewer
pectinal teeth then either (1) dorsal metasomal setae I-IV 0,0,0,1, or (2)
no mrs seta on basitarsus II; Basitarsus II with mrs seta 4; Carapace
length/cheliceral fixed digit length ratio 6 .5 or less.............becki
microgroup, P. becki.
AMERICA. USA (California, Nevada).
TYPE DATA: Male holotype from the Nevada test site,
approximately 34 miles due north of Mercury, Nye County, Nevada, July 21,
1961, in the American Museum of Natural History.
DISTRIBUTION: Southern Nevada and southern
California (fig. 56). RECORDS: California: Riverside County: Indio, April 3,
1959 (W. J. Gertsch), female. Los Angeles County: Pearblossom, May 2, 1960
(W. J. Gertsch), male. San Bernardino County: Saratoga Springs, Death
Valley, February 9, 1955 (W. McDonald), female; Phelan, April 19, 1960 (W.
J. Gertsch), female; Pisgah Crater, February 11 to July 12, 1961-1962
(Norris and Heath), two males, 11 females; Victorville, April 2, 1922 (E.
Seton), three females. Kern County: Two miles south of Mojave, June 29, 1960
(T. S. Briggs), male. Inyo County: Lee Flat, on Saline Valley road, 6.7
miles southwest of Grapevine Canyon, south of Saline Valley, August 27, 1965
(T. S. Briggs, K. Hom), under yucca, male; Grapevine Canyon, south of Saline
Valley, August 27, 1965 (V. Lee, K. Hom), exposed at night by UV lamp,
female, two immature; Olancha, July 18, 1952 (W. J. Gertsch), male. Nevada:
Clarke County: Eight miles northeast of junction of Deer Creek road and
Highway 52, near Charleston Mountain, August 18, 1965 (K. Hom), two females;
Las Vegas, February-June, 1965 (D. J. Zinn), male, two females. Nye County:
Nevada test site, north of Mercury (Gertsch and Allred, 1965), many males
and females; Lathrop Wells, August 28, 1965 (K. Hom),
under boards, three immature; Round Mountain, June 28, 1961 (F. E. Russell),
immature male. Churchill County: Soda Lake, near Fallon, July 23, 1965 (K.
Hom), two males, female, two immature.