Pheidole humeridens

At the type locality humeridens colonies occupied conspicuous mound nests in a heavily grazed pasture. (Wilson 2003)

Identification
See the description in the nomenclature section.

Distribution
Only known from the type locality.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina.

Nomenclature

 *  humeridens. Pheidole humeridens Wilson, 2003: 301, figs. (s.w.) ARGENTINA.

Description
A member of the fallax group similar in various characters to Pheidole chiapasana, Pheidole dentata, Pheidole laeviventris, Pheidole madrensis, Pheidole maja and Pheidole tetroides, differing as follows.

Major: humerus dentate; rugoreticulum on sides of head extends to halfway between eyes and level of occiput; mid-occiput transversely carinulate; antennal scapes reach halfway between eyes and level of occiput; anterior edge of pronotum and all of propodeal dorsum transversely carinulate; in side view, propodeal spines short, vertical to basal propodeal face; from above, postpetiole oval.

Minor: bicolored (see below); humerus toothed; propodeal tooth small and thin; propodeal dorsum carinulate; occiput in full-face view flat.

MEASUREMENTS (mm) Holotype major: HW 1.50, HL 1.56, SL 1.02, EL 0.26, PW 0.78. Paratype minor: HW 0.74, HL 0.80, SL 0.94, EL 0.20, PW 0.46.

COLOR Major: brownish yellow, with rear halves of gastral tergites changing to light brown.

Minor: bicolored, with head, gaster, and pronotal dorsum medium brown, and rest of body and appendages brownish yellow.



'''Figure. Upper: holotype, major. Lower: paratype, minor. Scale bars = 1 mm.'''

Type Material
ARGENTINA: Buenos Aires, col. James C. Trager.

Etymology
L humeridens, shoulder-tooth.