Gesomyrmex tobiasi

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Gesomyrmex tobiasi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Gesomyrmecini
Genus: Gesomyrmex
Species: G. tobiasi
Binomial name
Gesomyrmex tobiasi
Dubovikoff, 2004


Nothing is known about the biology of Gesomyrmex tobiasi.


Dubovikoff (2004) - The new species differs from female Gesomyrmex luzonensis by the higher thorax, and the structures of petiole and clypeus (soldiers of species of this genus are morphologically similar to female). G. tobiasi differs from other extant species (only workers are known) also on structure of petiole with protruding lobe and clypeus with two lateral protruding teeth.


Distribution based on Regional Taxon Lists

Oriental Region: Vietnam (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




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

  • tobiasi. Gesomyrmex tobiasi Dubovikoff, 2004b: 220, fig. 1-2 (q.) VIETNAM.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



HK = 2.125, HW = 1.5, SL = 0.75, OL = 0.65, FL = 1.2, FW = 0.55, TL = 3.625, TH = 1.425, PL = 0.675, PH = 0.55, CI = 0.706, SI = 0.867, FI = 0.458, PI = 0.815, TI = 2.544.

Total length about 9.5 mm. Body yellow, mandibles and each of the tergites (in median part) castaneous. Head oblong, rectangular, about 1.5 times as long as broad (Fig. 2). Surface of clypeus, frons and genae longitudinally striated. Vertex covered with minute and scattered punctures. Eyes large, nearly 0.33 times as long as the head. Antennae 10-jointed. Scape is relatively short, its length approximately equal of eyes length. Terminal joint is oblong. The clypeus with two protruding teeth in their lateral parts directed to genae. Mesosoma oblong, its length about 2.5 times as long as height. Slope of pronotum is moderately steep (Fig 1), as distinct from G. luzoensis. Petiole with protruding lobe at the ventral extremity. Hairs situated on the middle part of frons and clypeus, the gular surface of the head, the ventral surfaces of cervum, protruding lobe of petiole and the sternites (Fig 1).

Type Material

Holotype: queen, Vietnam, Hoa Binh Prov., Mai Chau Distr., 40 km W Mai Chau, Pa Co, h = 1090, 19.IV.2002 (Belokobylskij (Zoological Institute of the Russian Academy of Sciences).


The species is named for Vladimir Ivanovich Tobias, a famous Russian entomologist, who helped me in my work with ant collections of ZISP for many years.