A common and widespread Anochetus within Madagascar.
- 1 Identification
- 2 Distribution
- 3 Biology
- 4 Castes
- 5 Nomenclature
- 6 References
Fisher and Smith (2008) - The species is most similar to Anochetus madagascarensis but can be easily distinguished by its small eyes and scape that does not surpass the occipital lobe. A. madagascarensis has large eyes (0.24–0.26 mm), and scapes that surpass occipital lobes.
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Fisher and Smith (2008) - Widespread throughout Madagascar in forest and shrubland habitats below 1,550 m elevation (Fig 4b). It has been collected in gallery, dry, littoral, lowland, and montane forest, in desert spiny bush thicket in the southwest, and Uapaca woodland in the central plateau. As in many soil dwelling ants, A. grandidieri has reduced eyes (EL/HW 0.11–0.13) and short scapes. A. grandidieri is the only Anochetus in Madagascar with these soil nesting modifications. The subterranean habitat of this species may allow it to survive in a wide range of habitats in Madagascar from desert to woodland to montane forest. Out of 453 collecting events, A. grandidieri was most often recorded in sifted litter (97 collection records), rotten logs (96), and Malaise traps (155).
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- grandidieri. Anochetus grandidieri Forel, 1891b: 108, pl. 3, fig. 9 (w.) MADAGASCAR. Fisher & Smith, 2008: 8 (q.m.). Senior synonym of madecassus: Brown, 1978c: 557.
- madecassus. Anochetus madecassus Santschi, 1928d: 54 (q.) MADAGASCAR. Junior synonym of grandidieri: Brown, 1978c: 557.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Fisher and Smith (2008) - Measurements: maximum and minimum based on all specimens, n = 20. HL 0.79–1.19, HW 0.71–1.06, CI 85–95, EL 0.08–0.13, ML 0.33–0.57, MI 41–54, SL 0.57–0.88, SI 78–86, WL 0.87–1.35, FL 0.57–0.90, PW 0.44–0.62.
Inner blade of mandible without teeth and denticles; apical end of inner blade without a notched semicircular concavity. Eyes small (0.05–0.11 mm), projecting dorsolaterally. In full face view, antennal scape usually not reaching, and not surpassing posterior margin of occipital lobe. Dorsal surface of head with numerous short setae.
Fisher and Smith (2008) - Measurements: maximum and minimum based on n = 5. HL 0.88–1.15, HW 0.81–1.07, CI 92–96, EL 0.17–0.23, ML 0.39–0.56, MI 44–49, SL 0.62–0.87, SI 77–81, WL 1.08–1.46. FL 0.68–0.96, PW 0.60–0.78.
Very similar to workers, only slightly larger than respective size class (Figs 3e–h). Ergatoid queens not recorded.
Fisher and Smith (2008) - Measurements: maximum and minimum based on n = 5 from Madagascar: HL 0.58–0.73, HW 0.78–0.94, CI 129–135, EL 0.37–0.46, SL 0.10–0.15, SI 13–16, WL 1.17–1.52, FL 0.78–1.08
Fisher and Smith (2008):
Anochetus grandidieri. Lectotype: worker, Madagascar, Forest of the east coast (M. Humblot) (Musee d'Histoire Naturelle Genève), present designation [examined], AntWeb CASENT0101819.
Anochetus madecassus Santschi, 1928: 54. Lectotype: dealate queen, Madagascar, Nossi-Bé (Descarpentries) (Naturhistorisches Museum, Basel) Lectotype by present designation [examined] AntWeb CASENT0101098.
- Brown, W. L., Jr. 1978c. Contributions toward a reclassification of the Formicidae. Part VI. Ponerinae, tribe Ponerini, subtribe Odontomachiti. Section B. Genus Anochetus and bibliography. Studia Entomologica. 20:549-638. (page 557, senior synonym of madecassus)
- Fisher, B. L. and M. A. Smith. 2008. A Revision of Malagasy Species of Anochetus Mayr and Odontomachus Latreille (Hymenoptera: Formicidae). PloS one. 3:e1787.
- Forel, A. 1891c. Les Formicides. [part]. In: Grandidier, A. Histoire physique, naturelle, et politique de Madagascar. Volume XX. Histoire naturelle des Hyménoptères. Deuxième partie (28e fascicule). Paris: Hachette et Cie, v + 237 pp. (page 108, pl. 3, fig. 9 worker described)