Type Material

 

            Holotype: “Male holotype from 1 mi. N. W. Craig, Colorado, Moffet Co., 26- VI-1971 by J. 0. Brookhart; female allotype from 8 mi. S. W. Encampment, Wyoming, Carbon Co., 5-VIII-1967 by F. P. & M. Rindge. These localities may represent the easternmost extension of its range. Types are deposited in the American Museum of Natural History, New York, N. Y” (Brookhart & Muma, 1981, p. 292-295).

 

            Measurements: “Mesal tooth small. A/CP 5.784±0.17. Fondal notch (Fig. 15) L/W 1.2/1, palpal papillae 49±7.4; two short flat ctenidia (Fig. 19). Female genital opercula with straight, only slightly separated, interior margins and an almost straight posterior edge (Fig. 25). A/CP 5.5±0.30” (Brookhart & Muma, 1981, p. 295).

 

Palpal Description: “palpal papillae 49±7.4” (Brookhart & Muma, 1981, p. 295).

 

            Ctenidia Description: “two short flat ctenidia (Fig. 19)” (Brookhart & Muma, 1981, p. 295).

            

            Operculum Description: “Female genital opercula with straight, only slightly separated, interior margins and an almost straight posterior edge (Fig. 25)” (Brookhart & Muma, 1981, p. 295).

            

            Chelicerae Description: “Male fixed finger as in E. pallipes with a narrow mesoventral groove. The shallow ventral hollow formed by the basal flange is traceable the entire length of the finger, (Fig. 16, 17), and is more rounded than in pallipes. Mesal tooth small” (Brookhart & Muma, 1981, p. 295). 

 

Diagnosis: “This species is closely related to E. pallipes and E. arizonica (Roewer). It is identified by pale coloration, 2 ctenidia on the male, and shape of the female genital opercula. The specific name is an anagram of the word Colorado. Canadian records of E. pallipes (Muma 1951) may well be this species” (Brookhart & Muma, 1981, p. 295).

 

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