Technomyrmex grandis

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Technomyrmex grandis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Technomyrmex
Species: T. grandis
Binomial name
Technomyrmex grandis
Emery, 1887

Technomyrmex grandis casent0249785 p 1 high.jpg

Technomyrmex grandis casent0249785 d 1 high.jpg

Specimen Labels

Synonyms

Nothing is known about the biology of Technomyrmex grandis.

Identification

Bolton (2007) - A member of the Technomyrmex grandis group. This spectacularlv setose, large species is one of the most easily recognised in the region. Its extremely dense long setae, coupled with its large posteriorly located eyes, long scapes and the presence of elevated setae on the scares and tibiae, render it unmistakable, The only other species of the same group in this region is Technomyrmex wheeleri, but this is smaller, has more anteriorly located eyes and a much shorter and more narrowly rounded propodeum. The setae of wheeleri are much sparser and shorter than those of grandis, For example the outstanding setae on the scapes and tibiae are shorter than the width of the segment from which they arise in wheeleri, longer in grandis; the longest setae on the first gastral tergite are always much longer than the maximum diameter of the eye in grandis usually shorter than the maximum diameter of the eye in wheeleri.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Democratic Republic of Congo.
Indo-Australian Region: Borneo, Indonesia (type locality), Malaysia, Philippines.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

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

  • grandis. Technomyrmex grandis Emery, 1887a: 248 (w.) INDONESIA (Sumatra). Senior synonym of bandarensis: Bolton, 2007a: 83.
  • bandarensis. Technomyrmex grandis var. bandarensis Forel, 1913k: 96 (w.) INDONESIA (Sumatra). Junior synonym of grandis: Bolton, 2007a: 83.

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 3.8 - 4.8, HL 0.85 - 1.05, HW 0.74 - 0.96, SL 0.98 – 1.18, PW 0.54 - 0.72, WL 1.26 - 1.58 (20 measured). Indices: CI 85 - 91, SI 123 - 134, OI 28 - 31, EPI 100 - 120, DTI 132 - 145.

Large, conspicuous and very densely setose species. Dorsum of head in profile with abundant setae of varying lengths everywhere; longest pair, which is usually at least equal to the maximum dIameter of the eye, located about half-way between level of posterior margin of eye and posterior margin of head. Ventral surface of head with short setae present. With head in full-face view the posterior margin and sides with numerous outstanding short setae, those on the sides inclined anteriorly. Anterior clypeal margin almost transverse. at most with a hint of a shallow median concavity; posterior margin of head impressed. Eyes located relatively far back on head (EPI 100 or more), their outer margms strongly convex and breaking the outline of the sides of the head. Scapes with abundant setae on all surfaces, the longest slightly longer than the width of the scape. All dorsal surfaces of mesosoma with numerous setae of varying length. Propodeum in protlle with the dorsum long and convex, rounding broadly and evenly into the declivity. Gastral tergites 1 - 4 each with an abundant mixture of long and short setae, and also with dense long pubescence; longest setae are distinctly longer than the maximum diameter of the eye. Middle and hind tibiae with numerous suberect projecting setae, the longest about equal to the maximum tibial width. Setae also present on dorsal surfaces of middle and hind femora. Colour medium brown to black, sometimes with the gaster slightly darker than the mesosoma. Legs usually slightly lighter than mesosoma.

Type Material

Bolton (2007) - Syntype workers, Indonesia: Sumatra, KajuTanam, viii-ix.1878 (O. Beccari) (Museo Civico di Storia Naturale, Genoa) [examined].

References

  • Bolton, B. 2007. 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. 1887b [1886]. Catalogo delle formiche esistenti nelle collezioni del Museo Civico di Genova. Parte terza. Formiche della regione Indo-Malese e dell'Australia. [part]. Ann. Mus. Civ. Stor. Nat. 24[=(2)(4): 241-256 (page 248, worker described)