The Arachnid Order Solifugae

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PHYLOGENY/TAXONOMY

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

EREMOBATINAE
  Eremobates
      angustus
group
      aztecus
group
      lapazi
group
     pallipes group
      palpisetulosus
group
      scaber
group
          Eremobates actenidia
          Eremobates ascopulatus
          Eremobates clarus
          Eremobates corpink
          Eremobates ctenidiellus
          Eremobates hodai
          Eremobates icenogelei
          Eremobates legalis
          Eremobates mormonus
          Eremobates scaber
          Eremobates similis
          Eremobates socal
          Eremobates zinni
      vallis
group

  Eremocosta
  Eremorhax
  Eremothera
  Horribates

THEROBATINAE
  Chanbria
  Eremochelis
 
Hemerotrecha

 

 

 

 

 

 

 

 

 

 

 


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

 

 

 

 

 

 

 

 

 

 

 



Eremobates clarus Muma 1989

Eremobates clarus ►Muma 1989: 10, 49, Figs. 3, 4; ►Brookhart and Cushing, 2004: 293-295, 307, 310, figs 33, 36, 45, 54; ►Brookhart and Brookhart, 2006: 313.

HOLOTYPE: UNITED STATES: Wyoming: Carbon County - Saratoga Stratton Experimental Watershed (41Ί27'N, 106Ί48'W), 2194 meters (7900 ft.) elevation, in pitfall trap, 17–21 July 1973 (John Schmid), 1 male (holotype).  Deposited in AMNH.

Original description:
Muma 1989: 10, 49, Figs. 3, 4:

MALE HOLOTYPE: Total length 19.0 mm.

 

Length

Width

Chelicerae

4.7 mm.

2.33 mm.

Propeltidium

2.3

3.4

Palpus

16.0

 CL/CW=2.04

Leg 1

12.0

PW/PL=1.47

Leg 4

20.0

A/CP=6.86

 

 

CP = 7.0

Coloration and markings very pale and indistinct. Chelicerae pale, propeltidium dusky with purple only on margins, abdominal tergites lightly dusky, and legs and palpi pale and apparently without markings.Structure similar to E. scaber and other species with a wide, shallow fondal notch, except for 2 short, flat, widely spaced abdominal ctenidia on first post-stigmatic sternite, figure 3. Cheliceral dentition shown in figure 4, which also shows ECCS at 140x normal light magnification.

Figs. 3, 4.  Eremobates clarus Muma. ; 3. Ventral view of male ctenidia; 4. Ecto-lateral view of left male chelicera.  Redrawn from Muma (1989).

SUBSEQUENT ACCOUNTS:
Brookhart and Cushing, 2004: 293-295, 307, 310, figs 33, 36, 45, 54:

Description.—Males: Muma adequately described the male in 1989. Overall coloration very pale yellow, propeltidium dusky violet brown similar to E. scaber but with a larger median pale ovoid region, abdomen dusky, palpus and all legs pale yellow. Some specimens are duskier on propeltidium and appendages. Thick, male FF gently curved to only slightly upturned in ectal view, no teeth, MF with posterior IT separate from PT, AT with anterior cleft, MST absent, FT graded I, III, II, IV, Fondal notch equal to or slightly wider (Fig. 33). Palpal papillae 33—80 1, two tiny, peg-like ctenidia (Fig. 36)
Male holotype:
Total length 19.0, chelicera length 4.7, chelicera width 2.3, propeltidium length 2.3, propeltidium width 3.4, palpus length 16.0, first leg length 12.0, fourth leg length 20.0. Ratios: A/CP 6.86, PL/PW 0.76, CL/CW 2.04, FL/FW 0.72. Male measurements (5): Length 18.0–22.0, chelicera length 4.6–6.6, chelicera width 2.2–3.2, propeltidium length 2.2–2.6, propeltidium width 3.4–3.6, palpus length 13.5–17.0, first leg length 11.0–12.5, fourth leg length 17.0–21.0. Ratios: A/CP 5.32–6.86, CL/CW 1.86–2.19, PL/PW0.63–0.72, FL/FW 0.80–1.20, FW/FFW 2.80–3.75, CW/FFW 4.40–6.40.
Females:
Coloration as in males, chelicera typical of group. Posterior IT of MF separate Cleft under AT, MST tiny. Genital operculum with short, broad arms, medial margin undulate forming two small lobes, arms long, gently curved, posterior margin rounded (Fig. 54). Female measurements (6): Length 18.0–24.0, chelicera length 4.8–6.4, chelicera width 2.20–2.65, propeltidium length 1.6–2.6, propeltidium width 3.0–3.6, palpus length 13.0–15.5, first leg length 9.5–11.2, fourth leg length 16.0–21.0. Ratios: A/CP 4.92–6.97 CL/CW 2.04–2.50, PL/PW 0.50–0.72, GOL GOW 0.46–0.56.

Figs. 33, 36, 45, 55 (redrawn from Brookhart and Cushing (2004)): 33. Ectal view male right chelicerae.  36 Ventral view of male ctenidia. 45 Dorsal view male propeltidia. 55 Ventral view female genital opercula. Scale line = 1 mm.

DISTRIBUTION: UNITED STATES: Colorado, Wyoming (Laramie Plateau).

PUBLISHED RECORds:  UNITED STATES: Wyoming: Carbon County - Saratoga Stratton Experimental Watershed (41Ί27'N, 106Ί48'W), 2194 meters (7900 ft.) elevation, in pitfall trap (same one as for holotype), 17–21 July 1973 (John Schmid), 1 male (paratype) (AMNH); date? (Jon Schmid), ♂ (DMNS).  Colorado: Moffat County - Castle Park, Dinosaur National Monument,  (40Ί28'N, 108Ί53'W), 18–30 June 1948 (Hugo Rodeck), 4 ♂ (CU); 4 July 1949 (Hugo Rodeck) ♂, ♀ (CU); 3.2 Km W of Craig (40Ί30'N, 107Ί32'W), 26 May–16 June 1971 (Jack & Irene Brookhart) 2 ♂s, ♀ (CU); 35.4 Km W of Craig, 18 June 1993 (no collector named), ♀ (CU); 19.3 Km W of Craig, 1 May–26 July 1998 (Jack & Irene Brookhart), 3 ♂ ( DMNS).

nOTES:   Per Muma, (1989), this species can be distinguished from the closely related E. scaber and E. mormonus by its 2 short, flat abdominal ctenidia and its entirely pale legs and palpi. Muma (ibid.) further noted that three species of the Eremobates scaber group are known to have a wide, shallow fondal notch and that they are most easily separated from each other by the number and form of abdominal ctenidia, ihe presence or absence of palpal scopula, and the coloration of their legs and palpi. Brookhart and Cushing (2004) noted that Eremobates clarus can be dstinguished from its close relative, E. scaber, by the less crimped (in ectal view), more smoothly curved, fixed cheliceral finger, the cleft under the anterior tooth of the movable finger, and the broader anterior arms and less pronounced undulation of the medial margin of the female genital operculum. They further noted that it can be distinguished from E. ascopulatus by its pale coloration, slightly different female genital operculum, and the shape of its ctenidia. In a key to males of the scaber group, Brookhart and Cushing (ibid.) characterize E. clarus as follows:  Fixed cheliceral finger with no or slight crimping in ectal view, fond length to width ratio equal (Fig. 33); posterior intermediate tooth of movable finger in the notch of primary tooth; cleft present under anterior tooth of movable finger; palpal color dusky yellow; two broad, flat, ctenidia, these not sword-shaped (Fig. 36). Elsewhere, they commented that the FW/FFW ratio identifies this species as having a significantly wider fixed finger than most other species of the group (as is also indicated for E. icenoglei and E. scaber).  Brookhart collected Eremobates clarus during the summer of 1998 from pitfall traps placed in both Piρon pine/Juniper and greasewood (Sarcobartus sp.) habitats in northwest Colorado near Dinosaur National Monument.  According to Brookhart and Cushing (ibid.), it appears to occupy the area encompassed by the Laramie Plateau.  Brookhart and Brookhart (2006) include the species in an annotated checklist of continental North American solifugae.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   
   
 


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