Thaumatomyrmex contumax

Identification
Key to Thaumatomyrmex

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil.

Nomenclature

 *  contumax. Thaumatomyrmex contumax Kempf, 1975b: 108, figs. 13, 22, 33 (w.) BRAZIL. See also: Brandão, Diniz & Tomotake, 1991: 336.

Worker
(holotype). TL 4.1 mm; HL 0.81 mm; HW 0.95 mm; CI 116; ML 1.04 mm; MI 127; IfW 0.68 mm; IfI 72; SL 0.72 mm; SI 89; WL 1.24 mm; PnW 0.60 mm; HfL 0.91 mm; HfI 96; PW 0.72 mm. Extremely close to mutilatus from which it differs in the following significant characters: head (Fig. 13) absolutely and relatively (as compared with head length) broader, cephalic index 116 (95-105 in mutilatus). Mandibles (Fig. 33) absolutely and relatively (as compared with head length) longer, mandibular index 127 (86-102 in mutilatus), the apical spine proportionately and absolutely longer, the tip projecting beyond the maximum width of head across eyes (included) when mandibles are closed, and the proximal spines distinctly cross each other on clypeus. Hind femur distinctly shorter than head width (HfI 96). Mid-coxae (fore and hind coxae black), all trochanters and basal third of femora ferruginous, apical two thirds of femora brownish black; tibiae pale testaceous; antennae dark brown.

The thorax and the petiole, which do not present any noticeable difference from those of mutilatus, are shown in Fig. 22.

Type Material
BRAZIL, Pernambuco State: Araripina, January 4, 1973, Raúl Montenegro leg. (n. 407) 1 female (holotype; WWK 8443).