The Arachnid Order Solifugae



Phylogeny of the Solifugae
Keys to FamiliesFamily AmmotrechidaeFamily Ceromidae
Family Daesiidae
Family Eremobatidae








Family Galeodidae
Family Gylippidae
Family Hexisopodidae
Family Karschiidae
Family Melanoblossidae
Family Mummuciidae
Family RhagodidaeFamily Solpugidae
Catalog of the Solifugae
























Eremobates vallis Muma 1989

Eremobates vallis ►Muma, 1989: 14-15, figs 15-19.

HOLOTYPE: United States: Male holotype collected from can traps in Rock Valley near Mercury, Nevada on June 20-25, 1965 by Martin H. Muma in DPI.

Original description:
Eremobates vallis Muma, 1989: 14-15, figs 15-19.

MALE HOLOTYPE: Total length 22.0 mm.

  Length Width
Chelicerae 4.7 mm. 2.3 mm.
Propeltidium 2.6 3.9
Palpus 21.0 CL/CW=2.04
Leg 1 16.0 PW/PL=1.50
Leg 4 26.0 A/CP =8.63
    CP =7.3

Coloration in alcohol rusty yellow with dusky purplish markings as follows: chelicerae unmarked; propeltidium lightly dusky with narrow pale median stripe; mesopeltidium, metapeltidium, and abdominal tergites lightly dusky, especially marginally; abdominal pleura pale; palpi lightly dusky on apical ends of femora and gradually becoming more extensive darkening on tibiae, metatarsi, and tarsi to distinctly dusky on tarsi, figure 15; all legs lightly dusky to dusky on apical ends of femora and and tibiae; all sternites pale yellow; malleoli white.
Structure typical of other species of genus and quite similar to the palpisetulosus species group. Apical plumose bristle of flagellum complex short, strongly flattened, and broad. Cheliceral dentition and other structures shown in figure 16. Abdominal ctenidia in figure 17. Usual pair of rows of long spine-like setae on palpal tibia and metatarsus short and indistinct. Leg 1 tarsi seem to have only one small claw as in other Eremobatinae, but paratype female has 2 such claws, indicating variations of character.

Figures 15 - 19 (redrawn from Muma 1989): 15. Meso-lateral view of right male palpus; 16. Ecto-lateral view of right male chelicera and mesolateral view of fixed cheliceral finger. 17. Ventral view of male ctenidia. 18. Ecto-lateral view of right female chelicera; 19. Ventral view of female opercula.

FEMALES: Total length 27.0 to 27.5 mm.

  Length Width
Chelicerae 5.7-6.0 mm 2.6-2.9 mm.
Propeltidium 2.9-3.0 4.4-4.7


Leg 1 14.0-15.0 PW/PL=1.53
Leg 4 24.0-25.0 A/CP =2.03
    CP =8.6-9.0

Allotype smaller measurements.
Coloration in alcohol almost identical with male except pale median, propeltidial stripe indistinct. Structure similar to other females of the genus. Chelicerae of paratype shown in figure 18, chelicerae of allotype badly worn. Opercula shown in figure 19. Two, tiny trace ctenidia on first post-stigmatic abdominal sternite. Leg 1 tarsi seem to have only one small claw, but see male description above.


DISTRIBUTION: United States: western Nevada and southeastern Callifornia. 

PUBLISHED RECORds: Female (allotype) collected from can traps in Rock Valley near Mercury, Nevada on June 20-25, 1965 by Martin H. Muma (in DPI); Female (paratype) collected in cantrap at Mercury, Nevada on July 20, 1965 by J.Hopkins (was in collection of M. H. Muma; presumed to be in DPI collection)

nOTES: REMARKS: DIAGNOSIS: This species not closely related to any other species or group of genus. Males readily distinguished by much broader fixed cheliceral fingers, lack of palpal scopula and 2 short flattened ctenidia on first post-stigmatic abdominal sternite. Females are distinguished by a small, flattened opercular notch and a pair of shallow, hollows near the margins of opercula. Cheliceral patterns also distinctive.ECCS shown for both male and female types. Setal evaluations made under normal light conditions at 140x magnification. Variation in leg 1 tarsal claw number disturbing but may not prove to be inconsistent when additional specimens have been examined. Or perhaps species is a link between Eremobatinae and Therobatinae.
































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