Genus Eremothera Muma 1951

Eremothera Muma, 1951: 82; Muma, 1970a: 29; Muma, 1976: 18; Muma, 1986: 9–10; Muma, 1987: 10; Muma 1989: 3 (key), 15; Harvey 2003: 248; Brookhart and Brookhart 2006: 301 (key) 305.


Type species:

Eremothera sculpturata Muma 1951


      Ectal view of chelicera of male Eremothera sculpturata Muma from Arizona.


Diagnosis:

Eremobatine species in which the fixed cheliceral finger of the male is shortened and bears pronounced ectal and mesal flanges on the dorsal surface, producing a shovel-like appearance

(see above).

 

Original description:

Muma 1951: 41, 82:

"Moderate-sized Eremobatinae. Fixed finger of males a flanged, shovel-like structure, with a weak mesal groove that does not extend the length of the finger. Flagellum complex composed of two large, dorsal, spatulate bristles between which is a long, slender, apically plumose spine and a basal group of short, slender, simple spines. First postspiracular abdominal sternite of males with ctenidia on its posterior margin. Mesal tooth of movable finger present. Ectal row of fondal teeth graded in size III, I, IV, II; mesal row I, III, II, IV."


Muma noted in his diagnosis of the subfamily Eremobatinae (p. 41): "Fixed finger of male chelicera usually style-like, except in Eremothera, new genus, and usually having a ventral or mesoventral groove."
In the first couplet of his key to males of the subfamily (same page) he separated Eremothera from other eremobatine genera as follows: "Fixed finger sculptured, not style-like......................................................................................................................Eremothera"

He included two species in Eremothera: E. sculpturata Muma (described as new) and, on the basis of the fondal dentition of the female, E. barberi Muma (also described as new from a single female specimen and  later transferred to the genus Eremobates by Brookhart and Muma in 1981).


Subsequent accounts:

Muma 1970a: 3 (key), 29:

3 -KEY TO SUBFAMILIES AND GENERA OF EREMOBATIDAE
(MALES AND FEMALES)

1. Leg I with 1 claw; large, robust, short legged species ...................... Eremobatinae Roewer-2

    Leg I with 2 claws; small, slender, long legged species ....................... Therobatinae Muma-5

2. Palpus with 2 ventral rows of long, robust, spinelike, erectile and deflectile setae on femur,
   tibia, metatarsus, and tarsus ...................................................................... Horribates Muma

    Palpus with or without spinelike setae; when present, apparently not movable and not on
   metatarsus and tarsus .......................................................................................................... 3

(MALES ONLY)

3. Fixed finger short and dorsally lobate or sculptured ................................ Eremothera Muma

    Fixed finger elongate and need1elike or stylelike ................................................................ 4

4. Mesoventral groove of fixed finger extending to base of finger; apical seta of flagellum-
  complex flattened and plumose ................................................................ Eremobates Banks

    Mesoventral groove of fixed finger not extending to base of finger; apical seta of flagellum-
  complex tubular, at most striate ............................................................... Eremorhax Roewer

5. Dorsal setae of flagellum complex simple and tubular ........................... Eremochelis Roewer

    Dorsal setae of flagellum-complex striate, plumose, spatulate, or otherwise modified .......
   ............................................................................................................................................... 6

6. Fixed finger distinctly sinuate, bent upward and bent or curved downward; dorsal setae
  plumose ......................................................................................................... Chanbria Muma

29 -    Genus Eremothera Muma

Eremothera Muma, 1951, p. 82.


Muma 1976: 18:

18 -     Genus Eremothera Muma, 1951

Only two species have been described in this genus; one is apparently Chihuahuan, the other Sonoran.


Muma 1986: 9, 10:

9, 10 - Genus Eremothera Muma, 1951

"The new records and new species of this genus that are included here do not significantly alter the diagnostic characters cited by Muma (1951). It should be noted, however, that one of the two large spatulate setae of the flagellum complex may be the apical plumose bristle and not a dorsal bristle as previously stated."


Muma 1987: 10:

10 -     Genus Eremothera Muma, 1951

"The new records and new species of this genus that are included here do not significantly alter the diagnostic characters cited by Muma (1951). It should be noted, however, that one of the two large spatulate setae of the flagellum complex may be the apical plumose bristle and not a dorsal bristle as previously stated."


Muma 1989: 3 (key), 15:

3 -     Key to Subfamilies and Genera of Eremobatidae

(Males Only)

1. Leg 1 with 1 claw; chelicerae about twice as long as wide; small to large species ...............
   ........................................................................................................Eremobatinae Roewer-2

1'. Leg 1 with 2 claws; chelicerae 2.5–3 times longer than wide; tiny to moderate sized
   species ......................................................................................................... Therobatinae-6

2. Fixed cheliceral finger long, style-like or needle-like; mesoventral groove a crease, slot or
   cup-like structure; moderate-sized to large species .......................................................... 3

2'. Fixed cheliceral finger short, sculptured and flanged; mesoventral groove a trough-like
    slot; moderate sized species ................................................................. Eremothera Muma

3. Mesoventral groove an indistinct hollow or crease that does not extend to the base of
    the fixed finger; movable finger dentition greatly reduced ................................................
   ....................................................................................... Arenotherus Brookhart and Muma

3'. Mesoventral groove a distinct crease, cup, or slot that may or may not extend to base of
   fixed finger; movable finger dentition normal or increased .............................................. 4

4. Mesoventral groove short, not extending to base of fixed finger; apical striate or
   plumose setae of male flagellum complex not obviously modified or flattened .............. 5

4'. Mesoventral groove long, extending to base of fixed finger; apical plumose seta of male
   flagellum complex obviously enlarged or flattened covering part of the mesoventral
   groove...................................................................................................... Eremobates Banks

5. Palpal metatarsus, tibia, and femur provided with enlarged spine-like seta, but they are not
    in ventral rows, especially robust, nor obviously movable ..................... Eremopus Roewer

5'. Palpal metatarsus, tibia, and femur provided with 2 ventral rows of enlarged, robust, spine-
  like, obviously movable setae ..................................................................... Horribates Muma

6. Fixed cheliceral finger strongly recurved, sigmoid, or S-shaped; mesoventral groove
    absent; both dorsal and ventral flagellum complex setae plumose, moderate sized
    species...........................................................................................................Chanbria Muma

6'. Fixed cheliceral finger style-like or needle-like, straight, curved, or undulate but not
    S-shaped or sigmoid; mesoventral groove present; dorsal flagellum complex setae striate,
    ventral setae striate or plumose ....................................................................................... 7

7. Fixed cheliceral finger with a mesoventral groove that varies from one or more indistinct
    creases to an elongate hollow or cup; small to moderate sized species ............................
   ............................................................................................................... Eremochelis Roewer

7'. Fixed cheliceral finger without a mesoventral groove; tiny to small species .......................
    ............................................................................................................. Hemerotrecha Banks

15 -     Genus Eremothera Muma, 1951

Eremothera Muma, 1951, p. 82; Murna, 1970, p. 29.

Moderate- sized Eremobatinae. Fixed cheliceral finger of males sculptured and with short, weak mesal groove that does not extend length of finger. Dorsal setae of flagellum complex striate; ventral setae plumose; apical striate, and apical plumose setae both flattened and spatulate. Females have opercula broadly triangular in form."


Harvey 2003: 248:

248 - Genus Eremothera Muma

Eremothera Muma, 1951: 82; Muma, 1970a: 29; Muma, 1976: 18; Muma, 1986: 9-10; Muma, 1987: 10;Muma, 1989:15.

Type species: Eremothera sculpturata Muma, 1951, by original designation.

Distribution: Mexico, southern U.S.A.


Brookhart and Brookhart 2006: 301 (key) 305:

301 -    Key to Subfamilies and Genera of Eremobatidae (males only)

(Taken from Muma 1987)

1. Leg 1 with 1 claw; chelicerae about twice as long as wide; small to large species ...............
   ........................................................................................................Eremobatinae Roewer-2

   Leg 1 with 2 claws; chelicerae 2.5–3 times longer than wide; tiny to moderate sized
   species ......................................................................................................... Therobatinae-6

2. Fixed cheliceral finger long, style-like or needle-like; mesoventral groove a crease, slot or
   cup-like structure; moderate-sized to large species .......................................................... 3

    Fixed cheliceral finger short, sculptured and flanged; mesoventral groove a trough-like
    slot; moderate sized species ........................................................................... Eremothera

3. Mesoventral groove an indistinct hollow or crease that does not extend to the base of
    the fixed finger; anterior tooth absent ............................................................. Eremorhax

    Mesoventral groove a distinct crease, cup, or slot that may or may not extend to base of
   fixed finger; anterior tooth present ................................................................................... 4

4. Mesoventral groove short, not extending to base of fixed finger; apical striate or
   plumose setae of male flagellum complex not obviously modified or flattened .............. 5

    Mesoventral groove long, extending to base of fixed finger; apical plumose seta of male
   flagellum complex obviously enlarged or flattened; covering part of the mesoventral
   groove................................................................................................................ Eremobates

5. Palpal metatarsus, tibia, and femur provided with enlarged spine-like seta, but not
   robust, not aligned in a ventral row, not movable ........................................... Eremocosta

    Palpal metatarsus, tibia, and femur provided ventrally with robust, obviously movable
   spinelike setae .................................................................................................... Horribates

6. Fixed cheliceral finger strongly recurved, sigmoid, or S-shaped; mesoventral groove
    absent; both dorsal and ventral flagellum complex setae plumose, moderate sized
    species...................................................................................................................Chanbria

    Fixed cheliceral finger style-like or needle-like and straight, curved, or undulate but not
   S-shaped; mesoventral groove present or absent; dorsal flagellum complex setae
   striate, ventral setae striate or plumose ........................................................................... 7

7. Fixed cheliceral finger with a mesoventral groove that may vary from a distinct crease to
   an elongate hollow or cup; dorsal flagellum complex simple or tubular; small to
   moderate sized species .................................................................................... Eremochelis

   Fixed cheliceral finger without a mesoventral groove; dorsal flagellum complex hooked or
   spatulate; tiny to small species ..................................................................... Hemerotrecha

305 -   Genus Eremothera Roewer 1934

  Eremothera Roewer 1951: 82.


Notes:

The genus Eremothera contains two species from the southwestern United States and adjacent Mexico.


Included species


Key to species



Bibliography:

Eremothera Muma, 1951: 82; Muma, 1970a: 29; Muma, 1976: 18; Muma, 1986: 9–10; Muma, 1987: 10; Muma 1989: 3 (key), 15.