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





Hemerotrecha banksi (Muma 1951)

Hemerotrecha californica Banks, 1903: 79; Comstock, 1913: 38 [junior secondary homonym of Cleobis californica Banks, 1899].
Hemerotrecha banksi Muma, 1951: 99-100, figs 185-192; Muma, 1962: 30-31; Muma, 1970a: 37-38; Muma, 1976: 20; Brookhart and Brookhart, 2006: 319 [replacement name for Hemerotrecha californica Banks, 1903].


HOLOTYPE: United States. California: Monterey County - Pacific Grove, (Harold Heath), 1 males (holotype). Deposited in the Museum of Comparative Zoology.

Original description

Muma, 1951: 99-100, figs 185-192 (as Hemerotrecha banksi):

males:  Total length, 10.0 to 12..0 mm. 

                            LENGTH             WIDTH
Chelicerae         2.2-3.1 mm         0.9-1.3 mm
Propeltidium    1.2-1.3                 1.9-2.2
Palpi                    7.0-9.0                 -       
1st legs                5.0-7.0                 -
4th legs               11.0-13.0             -

          Holotype, smaller measurements.
         Coloration in alcohol rusty yellow, with dusky purplish markings as follows: eye tubercle dark; propeltidium faintly dusky, darker on anterior margin; mesopeltidium, metapeltidium, and abdominal tergites dark but scarcely darker than rest of abdomen; venter dark; palpi dark on tarsi and distal end of metatarsi, faintly dusky on tibiae and femora; legs dark, lighter on tarsi and metatarsi. Some specimens have propeltidium, chelicerae, and lighter segments of palpi light, -rusty yellow with the dusky markings very faint. Malleoli dark on distal margins.
         Dentition of chelicerae variable but following the general pattern shown in figures 185 to 187. Movable finger with large principal tooth, anterior tooth about half the size of principal tooth, two intermediate teeth, of which the proximal is larger, a series of eight to 10 denticules in front of anterior tooth, and no mesal tooth. Fixed finger broad, undulate, and blunt at the tip. Fondal notch U-shaped, obscure, and only one-third as wide as base of fixed finger.
         Flagellum complex typical of group, with dorsal row of five striate bristles tubular except for apical and subapical bristles which are broad and flattened. Plumose bristles gently curved ventrally and weakly plumose. Mesal setae of movable finger plumose except for a few at the distal end of the finger.
         Eye tubercle situated on anterior margin of propeltidium. Eyes separated by one and one-half to two diameters. Propeltidium wider than long by a ratio of 1 to 1.6.
         Metatarsus, tarsus, and tibia provided with many fine cylinder bristles, but there is no scopula on the metatarsus. Metatarsus of palpus about 2.5 times as long as tarsus.
         First post-spiracular abdominal sternite provided with two straight, flattened, lanceolate ctenidia which do not extend the length of the succeeding segment.

FEMales:  Total length, 11.0 to 13.0 mm. 

                            LENGTH             WIDTH
Chelicerae         4.1-4.8 mm         1.6-1.8 mm
Propeltidium    1.6-2.0                 2.7-3.1
Palpi                    6.5-8.0                 -       
1st legs                5.5-7.0                 -
4th legs               9.0-11.0               -

Coloration and markings in alcohol similar to those of male.
          Dentition of chelicerae as shown in figures 190 and 191. Movable finger with large principal tooth, anterior tooth about half as large as principal tooth, a series of six or eight denticules in front of anterior tooth, and no mesal tooth. Fixed finger with principal, medial, and anterior teeth large and nearly equal in size, two intermediate teeth between principal and medial and medial and anterior teeth, and two or three denticules in front of anterior tooth. Supernumerary teeth are common. Fondal teeth same as in male.
         Structure similar to that of male. Some specimens have two fine, hair-like, trace ctenidia on the first post-spiracular abdominal sternite which are scarcely distinguishable from setal clothing. Opercula of genital segment shown in figure 192.


PUBLISHED RECORDS: As Therobates arcellus: United States. Nevada: Washoe County - Mercury, 11 July 1960 (Elden Beck), 1 female; 15 July 1960 (Elden Beck), 1 female; 16 July 1960 (Elden Beck), 1 female; 17 July 1960 (Elden Beck), 1 female; 21 July 1960 (Elden Beck), 1 female; 27 July 1960 (Elden Beck), 1 female.




































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