Type Material

 

Holotype: “Male holotype, collected by Opler & Buckman, Valley Falls, Lake County, Oregon, USA, 26 May 1999 (deposited in DMNH)” (Brookhart and Cushing, 2002, p. 95).

 

Measurements: Male holotype: Total, 14 mm length. Chelicera, 3.3 mm length; 1.3 mm width. Propeltidium, 1.8 mm length; 2.3 mm width. Palpus, 14 mm length. Leg I, 7 mm length. Leg IV, 16 mm length. A/CP=7.3; CL/CW=2.5; FL/FW=0.7; WFF/FW=1.0; CW/WFF=4.2.

 

Chelicerae Description: “Fixed finger straight most of the length, curved down slightly at the tip. Ventral edge minutely undulate ending in a shallow trough apically. Mesoventral groove shallow, extending about one half the length of FF on the central edge. Movable finger with a single large PT and a small depression anteriorly. No AT or IT. Apical one third with shallow trough on dorsal edge. MST absent. Fondle notch a semicircle rising into the ventral edge of the FF. Fondal teeth graded I, II, III, IV ectally and mesally (Figs. 41 & 42)” (Brookhart and Cushing, 2002, p. 95).

 

Chelicerae Setae Description: “Flagellum complex typical of branchi group with dorsal bristles tubular, medial bristle flatted plumose, ventral series thin, plumose” (Brookhart and Cushing, 2002, p. 95).

 

Palpal Description: “Palpus (Fig. 40) and Leg I dusky purple on femur, tibia, metatarsus, and tarsus. . . . No papillae on palpal scopae” (Brookhart and Cushing, 2002, p. 95).

 

Ctenidia Description: “Two short, thin ctenidia found on posterior margin of the 4th abdominal segment (Fig. 43)” (Brookhart and Cushing, 2002, p. 95).

 

Diagnosis: “Eremochelis oregonensis is placed in the Eremochelis branchi group (Muma 1951) based on the form of flagella complex which has a flattened apical striate setae and a slightly undulate FF. It keys to couplet three Muma (1987). Females unknown” (Brookhart and Cushing, 2002, p. 95).

Other Information: “Eremochelis oregonensis can be distinguished from the closely related E. bidepressus by the size of the ctenidia which are short in E. oregonensis and long and thin in E. bidepressus and the position of the mesal groove. E. bidepressus has only been found in Utah” (Brookhart and Cushing, 2002, p. 95).