Anonychomyrma biconvexa

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Anonychomyrma biconvexa
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Anonychomyrma
Species: A. biconvexa
Binomial name
Anonychomyrma biconvexa
(Santschi, 1928)

MCZ-ENT00021265 Iridomyrmex foetans hal.jpg

MCZ-ENT00021265 Iridomyrmex foetans had.jpg

Type Specimen Label



Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


Anonychomyrma species are common in moist to semi-arid forested areas (and are less common in rain forests). They nest either in soil with or without coverings, or arboreally in living or dead wood. Workers forage in conspicuous trails on the ground and on tree trunks. Although not studied in detail, they seem to be general predators and also collect plant juices. Some species are associated with the caterpillars of selected butterflies. Nest sizes are moderate to large, ranging from 500 to tens of thousands of workers. When disturbed, most species elevate their gasters and release strong, acrid smelling chemicals as a defensive measure. While similar to Iridomyrmex in general habitat preferences and ecology, most Anonychomyrma prefer moister sites and are predominately arboreal. Iridomyrmex species occur in drier sites and are predominantly terrestrial.




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

  • biconvexa. Iridomyrmex biconvexus Santschi, 1928e: 471 (w.) AUSTRALIA. Combination in Anonychomyrma: Shattuck, 1992a: 13. Senior synonym of foetans: Brown, 1954i: 67. [Misspelled as triconvexus by Baroni Urbani, 1977e: 76.]
  • foetans. Iridomyrmex foetans Clark, 1929: 122, pl. 1, fig. 4 (w.) AUSTRALIA. Junior synonym of biconvexa: Brown, 1954i: 67.

Type Material



  • Baroni Urbani, C. 1977e. Katalog der Typen von Formicidae (Hymenoptera) der Sammlung des Naturhistorischen Museums Basel (2. Teil). Mitt. Entomol. Ges. Basel (n.s.) 27: 61-102 (page 76, misspelled as triconvexus)
  • Brown, W. L., Jr. 1954i. New synonymy of an Australian Iridomyrmex (Hymenoptera: Formicidae). Psyche (Camb.) 61: 67 (page 67, senior synonym of foetans)
  • Santschi, F. 1928e. Nouvelles fourmis d'Australie. Bull. Soc. Vaudoise Sci. Nat. 56: 465-483 (page 471, worker described)
  • Shattuck, S. O. 1992a. Review of the dolichoderine ant genus Iridomyrmex Mayr with descriptions of three new genera (Hymenoptera: Formicidae). J. Aust. Entomol. Soc. 31: 13-18 (page 13, combination in Anonychomyrma)