Holotype: "Male holotype from Mercury, Nevada, on July 15, 1960, by Elden Beck. Female allotype from Mercury, Nevada, on July 15, 1960, by Elden Beck. Male paratypes from the same locality by the same collector on July 19, 1960, and July 21, 1960. Female paratype from the same locality by the same collector on July 25, 1960. All types in the American Museum of Natural History" (Muma, 1962, p. 12).
Chelicerae Description: "Dentition of chelicerae as in figures 63 and 64. Movable finger slender, strongly curved, with a large principal tooth, anterior teeth and one imtermediate tooth reduced to minute denticules, and no mesial tooth. Fondal teeth distinct from dentate socket margin, with both rows graded I, III, II, IV in size; supernumerary denticules often occurring between fondal teeth. FOndal noth twice as deep as wide and curved dorsally at its medial end. Fixed finger curved dorsally at base, straight in the middle of length and folded downward at tip; in dorsal view narrowed mesially in distal half" (Muma, 1962, p. 11).
Chelicerae Setae Description: "Groove of fixed finger a deep, dorsally hooded, mesially rounded concavity on distal half of finger. Flagellum complex typical of group, with dorsal tubular bristles curved downward at tips, plumose bristles curved upward, and basal tubular bristles straight or gently curved upward. Mesial setae of movable finger plumose excet for five or six at distal end of articulation area" (Muma, 1962, p. 12).
Ctenidia Description: "First post-spiracular abdominal sternite without ctenidia" (Muma, 1962, p. 12).
Diagnosis: "Males readily identified by folded tip of fixed cheliceral finger and narrow, curved, fondal notch. Females easily confused with females of Hemerotrecha serrata Muma but have distinctive opercula and no mesial tooth on movable finger. The different fondal tooth formula of the females is unique" (Muma, 1962, p. 11).
Eremochelis plicatus – male holotype AMNH [originally described as Therobates plicatus]
B.Y.U. – A.E.C.
Code / BF10C
15 July 1960
Mercury, Nevada N.T.S. (probably for Nuclear Test Site)
(All measurements in sp description except papillae segments)
Measurements:
| Char | Char description | Male & Female (mm) |
| CL | chelicerae length | 4.4-4.6 & 5.0-5.7 |
| CH | Chelcera height | 2.1-2.0 & 1.8-2.1 |
| FNL | Fondal notch length | |
| FNH | Fondal notch height | |
| FFH | Fixed finger height | |
| LI | First leg length | 13.0-13.0 & 12.0-13.0 |
| LIV | Fourth leg length | 26.0-26.0 & 24.5-27.5 |
| PPL | Propeltidium length | 2.1-2.2 & 2.3-2.4 |
| PPW | Propeltidium width (from bottom edge where “ears” begin) | 3.3-3.2 & 3.4-3.8 |
| PL | Palpus length | 22.0-23.0 & 1.0-21.0 |
| PMT | Palpal metatarsus length | 5.87 |
| PT | Palpal tarsal length | 1.25 |
| TL | Total length | 18.0-19.0 & 21.5-22.0 |
Notes:
Dark habitus and legs – took photo.
No ctenidia
Almost entire pedipalp dark (photo); @ 21 papillae on last 2/3 of palp metatarsus.
