Technomyrmex reductus

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Technomyrmex reductus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Technomyrmex
Species: T. reductus
Binomial name
Technomyrmex reductus
Bolton, 2007

Technomyrmex reductus casent0903046 p 1 high.jpg

Technomyrmex reductus casent0903046 d 1 high.jpg

Specimen Labels

The type material was collected from "limestone forest".

Identification

Bolton (2007) - T. reductus is immediately identified within the zoogeographical regions under consideration here by its reduced PF of 4,3. This pair formula is shared only with the otherwise unrelated Technomyrmex lujae of the Afrotropical region. Also diagnostic are the minute setae that are restricted to the gastral tergites and the absence of setae elsewhere on the dorsal mesosoma and head behind the clypeus.

Keys including this Species

Distribution

Sarawak, Borneo.

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Brunei Darussalam, Indonesia, Malaysia.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • reductus. Technomyrmex reductus Bolton, 2007a: 98, fig. 56 (w.) BORNEO.

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

Description

Worker

Holotype. TL 3.7, HL 0.77, HW 0.70, SL 0.68, PW 0.48, WL 1.01. Indices: CI 91, SI 97, 01 27, EPI 97, DTI 125.

Palp formula 4,3. Dorsum of head behind clypeus entirely lacks setae; dorsum covered with fine, dense minute pubescence that is slightly elevated, not appressed. With head in full-face view the anterior clypeal margin with a small, narrow median indentation; the posterior margin of the head shallowly concave. Eyes close to or at the midlength, their outer margins just fail to break the outline of the sides. Scape without setae but with dense minute pubescence that is somewhat elevated. Dorsum of mesosoma and propodeal declivity entirely lack setae. In profile dorsum of mesonotum slopes very shallowly and meets the propodeal dorsum in a very broadly obtuse angle. Metanotal groove present but not impressed, instead merely forming the angle between mesonotum and propodeum. Propodeum in profile with the dorsum extremely shallowly convex; straight-line length of dorsum much greater than the depth of the declivity to the spiracle, which itself is located high on the declivity. Gastral tergites 1 - 4 with sparse and extremely short, inconspicuous setae; those on the first tergite more or less restricted to close to the apex of the sclerite. Maximum length of setae on &astral tergites 1 - 2 only 0.30 x the maximum diameter of the eye, or even less. Tibiae of middle and hind legs without setae though some short, slightly elevated pubescence may be present. Head, mesosoma, petiole and gaster a more or less uniform rich dark brown; legs the same colour or slightly lighter.

Other worker. TL 3.5 - 3.7, HL 0.75 - 0.80, HW 0.67 - 0.72, SL 0.67 - 0.71, PW 0.47 - 0.52, WL 0.98 - 1.03 (12 measured). Indices: CI 88 - 91, SI 97 - 104, OI 27 - 30, EPI 93 - 100, DTI 120 - 130. As holotype.

Type Material

Holotype worker (upper of 2 specimens on pin), Malaysia: Sarawak, 4" Division, Gn. Mulu N.P., v.1978, limestone forest (M. Collins) (The Natural History Museum). Paratype. 1 worker (lower of 2 on pin), with same data (BMNH).

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.

References based on Global Ant Biodiversity Informatics

  • 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): 1-150.
  • Bolton, B. "Taxonomy of the dolichoderine ant genus Technomyrmex Mayr (Hymenoptera: Formicidae) based on the worker caste." Contributions of the American Entomological Institute 35, no. 1 (2007): 1-149.
  • Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58