Ammotrechula pilosa Muma 1951

Ammotrechula pilosa ►Muma, 1951: 134, figs 288-290; ►Muma, 1962: 43, figs 52-53; ►Muma, 1963: 2; ►Muma, 1970a: 54; ►Muma, 1976: 27; Rowland and Reddell, 1976: 10; Punzo, 1998g: fig. 2-4a; Brookhart and Brookhart, 2006: 325.

HOLOTYPE: Female holotype from Texas in the collection of the University of Utah.  DZUU

Original description:
Muma, 1951: 134, figs 288-290:

FEMALE HOLOTYPE: Total length, 14.0 mm. Chelicerae, 1.2 mm. wide and 3.7 mm. long. Propeltidium, 2.7 mm. wide and 2.2 mm. long.
Coloration and markings in alcohol somewhat faded but apparently as follows: chelicerae light yellow, with two dorsal and one ectal faint dusky purple stripe; propeltidium dusky purplish brown except for a small, oval, light area on each side of the eye tubercle, a large, longitudinal, light, diamond-shaped area, two irregular medial light areas near the posterior margin, and a light posterior marginal band; mesopeltidium, metapeltidium, and abdominal tergites light and apparently slightly dusky on lateral margins; second and third legs light yellow with all femora faintly dusky at distal ends, all tibiae faintly dusky on anterior faces and fourth tibiae faintly dusky on both anterior and posterior faces; first legs light yellow, palpi light yellow, with distal two-thirds of femora a dusky purplish brown, all of tibiae dusky and metatarsi dusky at the proximal end and mesoventrally for their entire length; eye tubercle dark; malleoli white. Dentition typical of the Ammotrechinae as shown in figure 288. The peak of the dorsal carina occurs over the first fondal tooth of the ectal row.
Palpi clothed with long and short hairs and scattered cylinder bristles on the tarsi, metatarsi, and tibiae but no series of short stout spines on either the metatarsi or tibiae.
Chelicerae three times as long as wide. Propeltidium wider than long by a ratio of 1 to 1.2. Eyes slightly less than one diameter apart. Genital plate typical of family; it is wider than long by a ratio of 1 to 1.7.

SUBSEQUENT ACCOUNTS:
Muma 1962:

DIAGNOSIS: A lack of serial spines on the palpus distinguishes this species.
MALES: Total length, 10.0 to 13.0 mm. Chelicerae 0.7 to 1.0 mm. wide and 2.6 to 3.2 mm. long. Propeltidium 1.7 to 2.1 mm. wide and 1.7 to 1.9 mm. long. Allotype smaller. Color and markings in alcohol same as those of female holotype, but all legs and palpi dusky purple except on coxae and trochanters which are pale yellow; mesopeltidium, metapeltidium, and abdominal sclerites dusky purple, with marginal and submarginal pale stripes.
Dentition of the chelicerae as in figures 52 and 53. Fixed finger slender and elongate but bearing normal dentition. Intermediate tooth of movable finger closer to principal tooth than anterior tooth. Dental group of movable finger occupying about one-third of length of finger. Flagellum as in A. peninsulana but margins curled mesially to cover all of mesial surface except small area surrounding attachment disc. Palpi clothed as in female. Chelicerae slightly less than three times as wide as long. Propeltidium about as long as wide. Eyes separated by slightly less than one diameter.

Muma 1970a:

DIAGNOSIS: Males have the palpi dusky except for the coxae and trochanters, the fixed cheliceral finger attenuate with the teeth only slightly aborted, no mesal tooth on the movable finger, and no serial ventral spinelike setae on the palpal tibia or metatarsus.  Females are colored like males, have a dorsal cheliceral carina, the genital plate wider that long by a ratio of 1:1.2, and no serial ventral spinelike setae on the palpi.

PUBLISHED RECORDS: 
Muma 1962: United States: arizona: Tucson, 5 July 1954 (W. J. Gertsch), 1 ♂ (allotype), 1 ♀, [AMNH]; California: Contra Costa County - Mt. Diablo, 30 May 1955 (J. G. and S. G. Rozen) 1 ♂; Mt. Diablo (Russelman Park) 14 May 1955 (J. W. MacSwain), 1 ♀.
Muma 1963: United States: Nevada: Mercury, 2 ♀

NOTES: Muma (1962) designated as "allotype" a male from Tucson, Arizona, and noted that the female collected with the allotype and the specimens recorded from California are marked like the allotype, which indicates that the holotype was a faded specimen or that the species is variable in color. Muma (1970a) reported the range of this species as Arizona, California, Nevada, and Texas. and again noted that this species seems somewhat variable in color.  Muma (1976) included the species in an annotated list of Western Hemisphere solifuges, again listing its distribution  as Arizona, California, Nevada, and Texas.  Brookhart and Brookhart (2006): included the species in a checklist of continental North American Solifugae, listing the distribution as Arizona, California, Nevada, and Texas.