Thaumatomyrmex contumax

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Thaumatomyrmex contumax
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Thaumatomyrmex
Species: T. contumax
Binomial name
Thaumatomyrmex contumax
Kempf, 1975
At a Glance • Gamergate  



Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


Thaumatomyrmex contumax removal of setae from polyxenid millipede
polyxenid millipede before and after treatment by Thaumatomyrmex contumax



The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

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



(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 Thaumatomyrmex 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.

Kempf 1975 Thaumatomyrmex.jpg Kempf 1975Thaumatomyrmex 3.jpg Kempf 1975 Thaumatomyrmex 4.jpg

Type Material

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


  • Brandão, C. R. F.; Diniz, J. L. M.; Tomotake, E. M. 1991. Thaumatomyrmex strips millipedes for prey: a novel predatory behaviour in ants, and the first case of sympatry in the genus (Hymenoptera: Formicidae). Insectes Soc. 38: 335-344 (page 336, see also)
  • Delabie, J. H. C.; Fresneau, D.; Pezon, A. 2000. Notes on the ecology of Thaumatomyrmex spp. (Hymenoptera: Formicidae: Ponerinae) in southeast Bahia, Brazil. Sociobiology 36: 571-584 (page 571, see also)
  • Jahyny, B. 2010. Histoire Naturelle du genre de fourmis néotropical Thaumatomyrmex Mayr 1887 (Arthropoda, Insecta, Hymenoptera, Formicidae, Ponerinae, Thaumatomyrmecini). Unpublished Ph.D. thesis, Université Paris XIII, Villetaneuse, 581 pp.
  • Kempf, W. W. 1975. A revision of the Neotropical ponerine ant genus Thaumatomyrmex Mayr (Hymenoptera: Formicidae). Stud. Entomol. 18: 95-126 (page 108, figs. 13, 22, 33 worker described)