Anochetus madagascarensis

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Anochetus madagascarensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Anochetus
Species: A. madagascarensis
Binomial name
Anochetus madagascarensis
Forel, 1887

Anochetus madagascarensis casent0005966 profile 1.jpg

Anochetus madagascarensis casent0005966 dorsal 1.jpg

Specimen labels

Synonyms

Widespread throughout Madagascar in forest or shrubland habitats below 1100 m elevation. It has been collected in gallery, dry, littoral, lowland, and montane forests, and in desert spiny bush thicket in the southwest of Madagascar.

Identification

The species is most similar to Anochetus grandidieri but can be easily distinguished by its large eyes (0.24–0.26 mm), and scapes that surpass occipital lobes (Fisher and Smith 2008).

Keys including this Species

Distribution

Comores and Madagascar.

Distribution based on Regional Taxon Lists

Afrotropical Region: Comoros.
Malagasy Region: Madagascar (type locality), Mayotte.

Check distribution from AntMaps.

Distribution based on specimens

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The above specimen data are provided by AntWeb. Please see Anochetus madagascarensis for further details

Biology

Fisher and Smith (2008) - The longer scapes and larger eyes of A. madagascarensis compared to A. grandidieri, correlate with nesting and foraging above the soil layer. The species was most often recorded nesting in rotten logs (99 collection records) followed by sifted litter (41). In addition, it was collected from dead twigs above ground (1), rot pockets (2), ground foragers (20), ground nests (6), Malaise trap (14), on low vegetation (2), and pitfall traps (4).

Males have been collected in Malaise traps in every month of the year and males have been noted to swarm and fly at dusk and early evening.

Castes

Worker

Queen

Male

Nomenclature

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

  • madagascarensis. Anochetus africanus var. madagascarensis Forel, 1887: 382 (w.) MADAGASCAR. Fisher & Smith, 2008: 12 (q.m.). Raised to species and senior synonym of friederichsi: Brown, 1978c: 557.
  • friederichsi. Anochetus africanus var. friederichsi Forel, 1918b: 155 (w.) MADAGASCAR. Junior synonym of madagascarensis: Brown, 1978c: 557.

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

Description

Worker

Fisher and Smith (2008) - Measurements: maximum and minimum based on n = 20. HL 1.35–1.68, HW 1.19–1.53, CI 87–94, EL 0.23–0.28, ML 0.73–0.93, MI 53–57, SL 1.11–1.41, SI 89–95, WL 1.60–2.02, FL 1.13–1.54, PW 0.63–0.80.

Inner blade of mandible without teeth and denticles; apical end of inner blade with notched semicircular concavity. Eyes large (0.24–0.26 mm), projecting dorsally. In full face view, antennal scape extends beyond posterior margin of occipital lobe. Dorsal surface of head asetose.

Queen

Fisher and Smith (2008) - Measurements: maximum and minimum based on n = 5. HL 1.52–1.66, HW 1.48–1.55, CI 92–97, EL 0.32–0.36, ML 0.81–0.89, MI 53–55, SL 1.26–1.39, SI 85–91, WL 1.99–2.22. FL 1.35–1.49, PW 0.84–0.92.

Very similar to worker and only slightly larger. Queens of only one size. Ergatoid queens not recorded.

Male

Fisher and Smith (2008) - Measurements: maximum and minimum based on n = 5 from Madagascar: HL 0.85–1.89, HW 1.07–1.20, CI 122–135, EL 0.63–0.69, SL 0.20–0.22, SI 18–21, WL 1.90–1.98, FL 1.35–1.47

Males light yellowish brown in color and with large projecting ocelli on vertex.

Type Material

Fisher and Smith (2008) - Lectotype: worker, Madagascar, Tamatave Province, Ivondro, (Dr. Conrad Keller) (Musee d'Histoire Naturelle Genève) present designation [examined] AntWeb CASENT0101574.

Anochetus africanus friederichsi Lectotype: worker, Madagascar, Tamatave Province, Prune Island (Nosy Alanana) (Friederichs) (Musee d'Histoire Naturelle Genève), present designation [examined] AntWeb CASENT010165.

References