The Arachnid Order Solifugae



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





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





Eremochelis bilobatus (Muma 1951)

Datames pallipes Say: Simon, 1879a: 139-142 (misidentification, in part).
Eremobates pallipes
(Say): Kraepelin 1901a: 126, fig. 93 (misidentification); Roewer, 1934: 555-557, figs 116d, 322a (misidentification).
Therobates bilobatus
Muma, 1951: 92-94, figs 165-173
Adobe PDF icon; Muma, 1966a: 28, fig. 7; Muma, 1966c: 201, 202, 204, 205, 206, 210, 213; Muma, 1966d: 257; Muma, 1967b: 116, 121; Punzo, 1998g: fig. 2-4d.
Eremochelis bilobatus
(Muma): Muma, 1970a: 33, unnumbered fig. on p. 33; Brookhart, 1972: 33; Muma, 1974a: 8; Muma, 1974b: 388, 389, 391; Muma, 1974c: 15; Muma, 1975a: 60, 63, 64; Muma, 1976: 19; Rowland and Reddell, 1976: 9; Muma, 1979: 322-324, 326; Muma, 1980a: 132; Muma, 1980b: 269; Muma, 1982: plate 99; Muma, 1985: fig. 8; Muma, 1986: 11; Muma, 1987: 11; Muma and Muma, 1988: 21-23, fig. 6; Muma, 1989: 28, fig. 40; Vázquez Rojas, 1995: 31; Vázquez Rojas, 1996e: 76; Brookhart and Brantley, 2000: 445, 446; Brookhart and Brookhart, 2006: 317

HOLOTYPE: United States. Texas: Jeff Davis County - Davis Mountains, 2 July 1936 (J. N. Knull), 1 male (holotype).  Deposited in American Museum of Natural History. Male and female paratypes in the Museum of Comparative Zoology, United States National Museum, Cornell University, California Academy of Sciences, University of Utah, and University of Nebraska per Muma (1951).

Original description
Muma, 1951: 92-94, figs 165-173 (as Therobates bilobatus):

males:  Total length, 14.0 mm to 20.0 mm. 

                            LENGTH             WIDTH
Chelicerae         3.5-4.8 mm          1.3-1.9 mm.
Propeltidium    1.4-2.0                  2.4-5.3
Palpi                   14.0-18.0              -       
1st legs               9.0-13.0                -
4th legs               17.0-23.0             -

         Holotype, 18.0 mm. in length.
        Coloration in alcohol light to straw yellow, with dusky purple markings as follows:  chelicerae with one lateral and two dorsal faint dusky stripes each; eye tubercle dark;  propeltidium dusky except for a median light ovate area and a lighter median stripe the width of the eye tubercle; mesopeltidium, metapeltidium, and abdominal tergites faintly dusky; palpi and first legs dusky on apical ends of femora and all of tibiae, metatarsi,  and tarsi; second, third, and fourth legs dusky on apical ends of femora, all of tibiae, and proximal ends of metatarsi.   Malleoli white. Markings are indistinct on old alcoholic specimens and newly molted specimens.
         Dentition of chelicerae variable but following general pattern shown in figures 165 to 167. Movable finger with principal tooth large, two intermediate teeth, of which the proximal is larger and the distal minute or often missing, the anterior tooth reduced to an indistinct rounded ridge, and the mesal tooth missing. All fondal teeth are distinct from dentate socket margin of movable finger. Fondal notch V-shaped, with the sides incurved and about half as wide as the base of the fixed finger. Fixed finger typical of group; curved dorsally on basal half and abruptly narrow above on distal half in lateral view, in dorsal view it is abruptly narrowed mesally on distal half.
         Groove of fixed finger a deep narrow slot that widens gradually to fill the width of the finger at about the tip of the first fondal tooth beyond which it does not extend. Flagellum complex typical of group, with a row of dorsal simple tubular bristles, a series of similar S-shaped plumose bristles that cover the mesal groove, and a basal group of simple tubular bristles situated in the fondal notch.  Mesal setae of movable finger plumose except for a few at the distal end of the articulation area.
         Eye tubercle situated on the anterior margin of propeltidium. Eyes separated by slightly more than one diameter. Propeltidium wider than long by a ratio of 1 to 1.7.
         Metatarsus and tibia of palpus provided below with a single mesal row of long, robust spines and with long heavy cylinder bristles below and short fine ones above. Metatarsus of palpus without scopula and three times as long as tarsus.
         First post-spiracular abdominal sternite provided with four linear, blunt-tipped ctenidia, the middle pair of which is frequently shorter.

FEmales:  Total length, 17.0 mm to 20.0 mm. 

                            LENGTH             WIDTH
Chelicerae         4.2-5.0 mm          1.6-2.0 mm.
Propeltidium    1.4-1.8                  3.1-3.6
Palpi                   11.0-13.0              -       
1st legs               8.0-10.0                -
4th legs               16.0-18.0             -

         Female allotype, smaller measurements.
         Coloration and markings in alcohol same as in males.
         Dentition of chelicerae variable but following general pattern shown in figures 170 and 171. Movable finger with principal tooth large, two widely spaced intermediate teeth,  anterior tooth two-thirds as large as principal tooth, and no mesal tooth. Fixed finger with principal and medial teeth large, anterior tooth slightly smaller, two intermediate teeth between principal and medial teeth, and one tooth between medial and anterior teeth. Fondal teeth same as in male.
         Structure same as in male except the propeltidium is twice as wide as long and the first post-spiracular abdominal sternite is provided only with trace ctenidia which are scarcely distinguishable from the setae clothing the abdomen.
         Opercula of genital segment as shown in figure 173.

PUBLISHED RECORDS: United States. Arizona: Cochise County - Chiricahua Mountans, 18 July 1936 (J. N. Knull), 1 female (allotype) [AMNH]; Gila County - Globe, 8 July 1949 (F. Werner and W. Nutting), 2 males;  16 July 1948  (F. Werner and W. Nutting), 1 female; Pima County - Canada Del Oro, Santa Catalina Mountains, 1 August 1937 (Steckler), 1 female; Tucson, 6 June [year?] (S. H and J. L. Sperry), 1 male; Navajo County - Totem Pole, 17 July 1937 (A. M. Woodbury), 1 male.  Colorado: Montezuma County - Mesa Verde, July 23, 1941 (A. M. Woodbury), one female; June 14, 1936 (A. M. Woodbury), one male.  New Mexico: Otero County - 10 miles west of Tularosa, 10 July 1947 (Clyde P. Stroud), one male; Army Air Base, Alamogordo, 10 June 1947 (Clyde P. Stroud); one male; White Sands National Monument, Otero County, July 21, 1947, one male (Clyde P. Stroud); near White Sands National Monument, 17 July 1947 (Clyde P. Stroud), one male; Sierra County - Hot Springs, Elephant Butte, 26 June 1935 (Bishopp), one female.  Texas: Brewster County - Alpine, 21 June 1949 (G. M. Bradt), one female; Jeff Davis County - Fort Davis, 14 May 1912 (J. D. Mitchell), one male and one young female; Davis Mountains, 17 June 1947 (A. T. McClay), two males and one female; Sutton County - Sonora, 15 September 1925 (0. G. Babcock), one male; Val Verde County - Devil's River, 5 May 1907 (Bishopp), one female.


















































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