Pheidole trachyderma Emery ^HNS, new status

Pheidole risi subsp. trachyderma Emery ^HNS 1906c: 148.

Types Mus. Civ. Stor. Nat. Genova.

Etymology Gr trachyderma ^HNS, rough skin, alluding to rugoreticulate sculpturing.

diagnosis Similar in various traits to aper ^HNS, bambusarum ^HNS, brevicona ^HNS, dyctiota ^HNS, laeviventris ^HNS, lutzi ^HNS, rugatula ^HNS, senilis ^HNS, sigillata ^HNS, and traini ^HNS, distinguished as follows.

Major: reddish yellow; all of dorsal surface of head (including frontal lobes) rugoreticulate, except for occiput, antennal fossae, frontal triangle, and clypeus; margins of pronotal dorsum rugulose and humeri rugoreticulate, but rest of promesonotal dorsum almost exclusively foveolate; in side view promesonotum descends to metanotal groove in a near-vertical face; postpetiole from above cone-shaped.

Minor: all of head, mesosoma, and petiole foveolate and opaque, carinulae confined to anterior dorsal surface of head, and rugoreticula wholly lacking; occiput broad, lacking nuchal collar.

Measurements (mm) Lectotype major: HW 1.18, HL 1.18, SL 0.64, EL 0.14, PW 0.66.

Paralectotype minor: HW 0.58, HL 0.62, SL 0.58, EL 0.10, PW 0.40.

Color Major: concolorous medium reddish yellow.

Minor: concolorous light reddish yellow.

Range Known only from the type locality.

Biology Unknown.

Figure Upper: lectotype, major. Lower: paralectotype, minor. ARGENTINA: San Pedro, Misiones. Scale bars = 1 mm.