Eremobates vallis Muma 1989
Eremobates vallis ►Muma, 1989:
14-15, figs 15-19
.
HOLOTYPE:
United States:
Male holotype collected
from can traps in Rock Valley near Mercury, Nevada on June 20-25,
1965 by Martin H. Muma in DPI.
Original description:
Eremobates vallis
Muma, 1989: 14-15, figs 15-19.
MALE HOLOTYPE: Total length 22.0 mm.
| |
Length |
Width |
| Chelicerae
|
4.7 mm. |
2.3 mm. |
| Propeltidium
|
2.6 |
3.9 |
| Palpus |
21.0 |
CL/CW=2.04 |
| Leg 1 |
16.0 |
PW/PL=1.50 |
| Leg 4 |
26.0 |
A/CP =8.63 |
| |
|
CP =7.3 |
Coloration in alcohol rusty yellow with dusky
purplish markings as follows: chelicerae unmarked; propeltidium
lightly dusky with narrow pale median stripe; mesopeltidium,
metapeltidium, and abdominal tergites lightly dusky, especially
marginally; abdominal pleura pale; palpi lightly dusky on apical
ends of femora and gradually becoming more extensive darkening on
tibiae, metatarsi, and tarsi to distinctly dusky on tarsi, figure
15; all legs lightly dusky to dusky on apical ends of femora and and
tibiae; all sternites pale yellow; malleoli white.
Structure typical of other species of genus and quite similar to the
palpisetulosus species group. Apical plumose bristle of
flagellum complex short, strongly flattened, and broad. Cheliceral
dentition and other structures shown in figure 16. Abdominal
ctenidia in figure 17. Usual pair of rows of long spine-like setae
on palpal tibia and metatarsus short and indistinct. Leg 1 tarsi
seem to have only one small claw as in other Eremobatinae, but
paratype female has 2 such claws, indicating variations of
character.
Figures 15 - 19
(redrawn from Muma 1989): 15. Meso-lateral view of right male palpus; 16. Ecto-lateral
view of right male chelicera and mesolateral view of fixed cheliceral finger. 17. Ventral view of male ctenidia. 18. Ecto-lateral
view of right female chelicera; 19. Ventral view of female opercula.
FEMALES: Total length 27.0 to 27.5 mm.
| |
Length |
Width |
| Chelicerae
|
5.7-6.0 mm |
2.6-2.9 mm. |
| Propeltidium
|
2.9-3.0 |
4.4-4.7 |
| Palpus |
16.0-17.0 |
CL/CW=2.11 |
|
Leg 1 |
14.0-15.0 |
PW/PL=1.53 |
| Leg 4
|
24.0-25.0 |
A/CP =2.03 |
| |
|
CP =8.6-9.0 |
Allotype smaller measurements.
Coloration in alcohol almost identical with male except pale median, propeltidial stripe indistinct. Structure similar to other females of the genus. Chelicerae of paratype shown in figure 18, chelicerae of allotype badly worn. Opercula shown in figure 19. Two, tiny trace ctenidia
on first post-stigmatic abdominal sternite. Leg 1 tarsi seem to
have only one small claw, but see male description above.
SUBSEQUENT ACCOUNTS:
None.
DISTRIBUTION:
United States:
western Nevada and southeastern Callifornia.
PUBLISHED
RECORds:
Female (allotype) collected
from can traps in Rock Valley near Mercury, Nevada on June 20-25,
1965 by Martin H. Muma (in DPI); Female (paratype) collected in
cantrap at Mercury, Nevada on July 20, 1965 by J.Hopkins
(was in collection of M. H. Muma; presumed to be in DPI collection)
nOTES:
REMARKS:
DIAGNOSIS: This species not closely related to any other
species or group of genus. Males readily distinguished by much broader fixed
cheliceral fingers, lack of palpal scopula and 2 short flattened ctenidia on
first post-stigmatic abdominal sternite. Females are distinguished by a
small, flattened opercular notch and a pair of shallow, hollows near the
margins of opercula. Cheliceral patterns also distinctive.ECCS shown for both male and female types. Setal evaluations made under normal light conditions at 140x
magnification. Variation in leg 1 tarsal claw number disturbing but may not prove to be inconsistent when additional specimens have been examined. Or perhaps species is a link between Eremobatinae
and Therobatinae.
