Eremobates bajadae Muma
and Brookhart new species
21 to 24
holotype and female allotype collected in can traps in a Larrea
thicket, June I, 1973, north of Deming, NM by M. H. Muma and K. E. Muma,
distinguished by lack of ctenidia, rounded elements of anterior tooth of
movable cheliceral finger, and laterally obscure ventral notch of
movable cheliceral finger. Of many specimens examined casually and 17
examined closely only 1 had a single tiny (trace) ctenidium. Ventral
notch of movable finger always obscure from ecto-Iateral view, although
it becomes distinct if chelicera is rotated ventrally. Dorsal process of
fixed cheliceral finger peaked over distal half of fondal notch.
Females distinguished by apically, broadly rounded , anterior lobes of
opercula. concave lateral margins of posterior opercular notch, and the
wide, bowed vulvular opening.
Species pale to dark. dusty yellow in color with dark purplish markings.
Palpi pale with many specimens faintly dusky on tarsi or tarsi and
metatarsal tips. Legs pale with rare specimens dusky at femoral-tibial
union of leg IV. Propeltidia dark on anterior margins with some
specimens also faintly to distinctly dusky on anterior 1/3 (fig. 22), to
all of sclerite with narrow pale stripe; a few specimens also have
median, longitudinal, pale, oval area behind eyes. Population at Portal,
Arizona frequently has the propeltidia dusky for 1/3 to all of the
sclerite and the legs and palpi with dusky areas. Abdominal terga dusky
to dark with pleura pale to dusky. Sterna pale. Many females lack dusky
areas on propeltidia.
Males (17) somewhat variable in size; CP varies from 10.0- 13.8 (mean
12.1 ). Legs long; A/CP varies from 6.3-6.9 (mean 6.6). Fondal notches
longer than wide varying in length/width ratio from 1.3-1.9 (mean 1.7)
(fig. 2 1). Males have small to medium sized mesal tooth on movable
cheliceral finger; mode medium sized.
Females (15) more variable in size; CP varies from 9.8-15.3 (mean 11
.6). Legs short; A/CP
varies from 4.9-5.6 (mean 5.3). Females have small or medium sized mesal
tooth on movable cheliceral fin ger; mode small . Opercula with anterior
lobes undulate or concave mesally; opercular notches occupying
of opercula (mean 31) (figs.
23-24 ). Opercular
notches with straight or concave lateral margins.
This species is known only from western New Mexico and eastern Arizona .
We have examined and studied numerous males and females from Portal and
Douglas, Arizona and Rodeo, Road Forks, Lordsburg, Deming and Silver
City, New Mexico.
species has no known close relatives within the group and series. It is
nearly as large as
with a deep narrow fondal notch but lacks the
markings and ctenidia of that species. There are indications that this
species hybridizes with
norrisi new species. See
remarks under that species for maturity dates.