Technomyrmex andrei

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Technomyrmex andrei
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Technomyrmex
Species: T. andrei
Binomial name
Technomyrmex andrei
Emery, 1899

Technomyrmex andrei casent0178273 profile 1.jpg

Technomyrmex andrei casent0178273 dorsal 1.jpg

Specimen labels

Synonyms

The largest, most obvious and most widely distributed leaf litter species of Technomyrmex throughout the wet forest zones of the Afrotropical region. It is locally abundant in litter samples throughout west and central Africa and is one of the most commonly collected species of the genus in this region. It nests in and under rotten wood on the forest floor and forages widely in the leaf litter layer but is not known to ascend trees. (Bolton 2007)

Identification

Bolton (2007) - A member of the Technomyrmex bicolor group. The strikingly coloured legs, combined with its setal distribution, emarginate c1ypeus, posteriorly located eyes and size make andrei one of the most easily recognized African Technomyrmex species. Its worke.rs show considerable variation in size and weak allometric variation is present: as HW Increases then CI Increases but SI decreases.

The closest relatives of andrei are Technomyrmex parandrei and Technomyrmex metandrei. Both are certainly much rarer and much more limited in distribution. Both species share the general appearance of andrei but are distinctly differently coloured, as discussed under their respective headings.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Angola, Cameroun, Central African Republic, Democratic Republic of Congo, Gabon (type locality), Ghana, Guinea, Ivory Coast, Kenya, Liberia, Nigeria, Uganda.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Queen

Nomenclature

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

  • andrei. Technomyrmex andrei Emery, 1899e: 488, fig. (w.) GABON. Bernard, 1953b: 255 (q.). Senior synonym of allecta, schereri, wolfi, zumpti: Bolton, 2007a: 19.
  • schereri. Technomyrmex andrei var. schereri Forel, 1911e: 283 (w.) LIBERIA. Junior synonym of andrei: Bolton, 2007a: 19.
  • allecta. Engramma allecta Stitz, 1916: 394, fig. 9 (w.) DEMOCRATIC REPUBLIC OF CONGO. Combination in Technomyrmex: Shattuck, 1992c: 160. Junior synonym of andrei: Bolton, 2007a: 19.
  • wolfi. Engramma wolfi Forel, 1916: 432, fig. 1 (w.) DEMOCRATIC REPUBLIC OF CONGO. Wheeler, W.M. 1922a: 204 (q.m.). Combination in Technomyrmex: Shattuck, 1992c: 161. Junior synonym of andrei: Bolton, 2007a: 19.
  • zumpti. Technomyrmex zumpti Santschi, 1937b: 102 (m.) CAMEROUN. Junior synonym of andrei: Bolton, 2007a: 19.

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

Description

Worker

Bolton (2007) - TL 2.7 - 4.3, HL 0.72 - 1.06, HW 0.61 - 0.98, SL 0.78 - l.08, PW 0.44 - 0.66, WL 1.04 - 1.50 (35 measured). Indices: CI 82 - 95, SI 102 - 130, OI 25 - 30, EPI 85 - 100, DTI 144-156.

Dorsum of head behind clypeus entirely lacks setae. With head in full-face view the eyes located relatively posteriorly (EPI at least 85 and usually more) and their outer margins fail to break the outline of the sides. Anterior clypeal margin with a conspicuous broad median excavation or notch; inner margin of notch meets the more lateral portions of the anterior c1ypeal margin through rounded curves, not marked angles. Posterior margin of head with a marked median impression or emargination. Dorsum of mesosoma and declivity of propodeum entirely lack setae. First gastral tergite without setae but long stiff setae are present on gastral tergites 2 - 4, the longest of them longer than the maximum diameter of the eye. Dotsal surfaces of pronotum, mesonotum and propodeum finely and densely reticulate-punctate, usually quite sharply so but sculpture less strongly incised in some samples. Head, mesosoma, petiole and gaster more or less uniformly dark brown to black. Front legs with coxa the same colour as the mesosoma or nearly so; femur, tibia and tarsus the same or lighter, but the trochanter strikingly paler, white to yellow. Middle and hind legs with coxae, trochanters and basal one-quarter to one-third of femora white to yellow; remainder of femora darker except for apices; tibiae same colour as darker part of femora to uniformly paler than femora; tarsi yellow.

Type Material

Bolton (2007) - Holotype worker, Gabon: Ogoue (E. Andre) (Museo Civico di Storia Naturale, Genoa) [examined].

References

  • Bernard, F. 1953b [1952]. La réserve naturelle intégrale du Mt Nimba. XI. Hyménoptères Formicidae. Mém. Inst. Fr. Afr. Noire 19: 165-270 (page 255, queen described)
  • Bolton, B. 2007b. Taxonomy of the dolichoderine ant genus Technomyrmex Mayr (Hymenoptera: Formicidae) based on the worker caste. Contributions of the American Entomological Institute. 35(1): 1-149.
  • Emery, C. 1899d. Fourmis d'Afrique. Ann. Soc. Entomol. Belg. 43: 459-504 (page 488, fig. worker described)