Type Material
Holotype: "Female holotype from Grand Canyon, Arizona, July 2, 1956, in the American Museum of Natural History" (Muma, 1962, p. 10).
Chelicerae Description: "Dentition and strucuture similar to those of T. branchi Muma except there is a tiny supernumerary tooth just behind anterior tooth on fixed finger of chelicerae" (Muma, 1962, p. 10).
Ctenidia Description: "There are six trace ctenidia on first post-spiracular abdominal sternite" (Muma, 1962, p. 10).
Diagnosis: "This species seems to be most closely related to T. malkini, from which it differs in having a palpal scopula" (Muma, 1962, p. 10).
Eremochelis coloradensis – female holotype
Grand Canyon, Arizona, July 2, 1956
AMNH (originally described as Therobates coloradensis)
(All measurements in sp description except papillae segments)
Measurements:
| Char | Char description | M (mm) |
| CL | chelicerae length | 7.2 |
| CH | Chelcera height | 2.6 |
| FNL | Fondal notch length | |
| FNH | Fondal notch height | |
| FFH | Fixed finger height | |
| LI | First leg length | 13.5 |
| LIV | Fourth leg length | 23.5 |
| PPL | Propeltidium length | 2.8 |
| PPW | Propeltidium width (from bottom edge where “ears” begin) | 4.7 |
| PL | Palpus length | 18.5 |
| PMT | Palpal metatarsus length | |
| PT | Palpal tarsal length | |
| TL | Total length | 22.0 |
