Type Material

 

Holotype: “Male holotype, female allotype, and male and female paratypes from Portal, Arizona, Cochise Co, on November 9, 1964 by V. Roth in FSCA” (Muma, 1989, p. 32-33).

 

Measurements: Males: Total, 13.0-13.5 mm length. Chelicera, 3.1-3.2 mm length; 1.0-1.1 mm width. Propeltidium, 1.6-1.8 mm length; 2.1-2.2 mm width. Palpus, 14.0-14.5 mm length; CL/CW=2.90. Leg I, 9.0-10.0 mm length; PW/PL=1.29. Leg IV, 16.0-17.0 mm length; A/CP=8.28. CP=4.7-5.0. Allotype, larger measurements. Females: Total, 15.0-18.0 mm length. Chelicera, 3.9-4.4 mm length; 1.8-1.6 mm width. Propeltidium, 2.9-1.8 mm length; 4.7-2.9 mm width. Palpus, 11.0-12.0 mm length; CL/CW=2.80. Leg I, 8.0-9.5 mm length; PW/PL=1.58. Leg IV, 15.0-17.0 mm length; A/CP=5.50. CP=6.8-6.2.

 

Chelicerae Description: “fondal tooth size gradient III, II, IV, I ectally and I, III, II, IV mesally” (Muma, 1989, p. 32).

 

Palpal Description: “Palpal setae so slender they cannot be counted accurately. No scopula on palpus. . . . Palpal metatarsus longer than tarsus by a ratio of 1 to 3.7” (Muma, 1989, p. 32).

 

Ctenidia Description: Females: “There are 4 trace ctenidia on first post-stigmatic abdominal sternite” (Muma, 1989, p. 32).

 

Diagnosis: “Males of the species readily distinguished from other group members by the curious, almost totally ventral, mesoventral groove, and the very short, broad-bladed, dagger-like abdominal ctenidia. Female opercula similar to other members of the group except lateral opercular lobe truncate and lack median lobes on anterior margin of mesal notch” (Muma, 1989, p. 32).

Other Information: “This species seems to be closely related in the females to attritus (Muma) but is distinctive morphologically and ecologically” (Muma, 1989, p. 33).