flexacus Muma, 1963: 3-4, figs 7-9.
Eremochelis flexacus (Muma): Muma, 1970a: 34; Muma, 1976: 19; Muma,
1986: 12; Muma, 1987: 12; Vázquez Rojas, 1995: 31; Vázquez Rojas, 1996e: 76;
Brookhart and Brookhart, 2006: 317-318.
Nevada: 10 mi. N of Mercury, 1 mi. E of Mercury Highway, 2 March 1961
(5EL4C), 1 male.
Deposited in the American Museum of Natural History.
Muma, 1963: 3-4,
figs 7-9 (as Therobates flexacus):
Total length, 20.0 mm to 21.0 mm.
Chelicerae 4.8-4.8 mm
Propeltidium 2.4-2.4 3.4-3.4
4th legs 25.0-25.0
Holotype smaller specimen
Coloration and markings almost identical to those of T. arcus Muma
except the dusky area on the leg femora covers the apical two-thirds of
Dentition of the same general type as
that of arcus except the fixed finger is slender, needle-like and
strongly S-shaped; the movable finger is provided with a strong
principal tooth, two tiny intermediate teeth and an aborted anterior
tooth but no mesal tooth; the fondal notch is shallow, bears no
denticules and is three times the width of the fixed finger at the base
The mesoventral groove of the fixed
finger is a narrow slot that extends nearly to the base of the finger
where it expands into a cup-like hollow. Flagellum complex with
basal, dorsal tubular bristles slightly S-shaped and plumose bristles
strongly S-shaped covering basal half of mesoventral groove.
Structure similar to that of T.
arcus, except that the propeltidium is wider than long by a ratio of 1
to 1.4, the palpal scopula is composed of about 50 papillae on the tibia
and 15 on the metatarsus (Figure 9), and there are only two slender
ctenidia on the first post-spiracular abdominal sternite (Figure 8).