Type Material

            Holotype: “Male holotype from Twentynine Palms, California, March-April, 1945 (Jefferson H. Branch), in the American Museum of Natural History. Male paratype from Argus Mountains, Arizona, April, 1891 (K)., in the United States National Museum” (Muma, 1951, p. 67). 

            Measurements: Total length, 20.0 to 22.0 mm. Chelicerae, 6.1 – 5.4 mm length; 2.9 – 2.5 mm width. Propeltidium, 3.0 – 2.8 mm length; 4.6 – 4.4 mm width. Palpi, both mangled to 21.0 mm. 1^st Legs, 18.0 – 16.0 mm. 4^th Legs, both mangled to 26.0 mm. Holotype, larger specimen (abdomen mangled on small specimen). 

            Ctenidia Description: “there are six hair-like ctenidia on the first postspiracular abdominal sternite. The holotype exhibits eight ctenidia, two of which are spurious” (Muma, 1951, p. 66-67).

            Chelicerae Description: “Structure similar to that of affinis (Kraepelin) except the anterior tooth of the movable finger is an evenly rounded lobe, the distal end of the finger is slender and cresent-shaped, the process of the fixed finger is a rounded spur which is nearly indistinguishable in lateral view” (Muma, 1951, p. 66).

Diagnosis:

Other Information: