Technomyrmex cedarensis

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Technomyrmex cedarensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Technomyrmex
Species: T. cedarensis
Binomial name
Technomyrmex cedarensis
Forel, 1915

Technomyrmex cedarensis casent0172042 profile 1.jpg

Technomyrmex cedarensis casent0172042 dorsal 1.jpg

Specimen labels

Technomyrmex antonii and cedarensis are both common in the sclerophyll woodlands of south-east Queensland and north-east New South Wales. T. cedarensis is found under stones and forages both terrestrially and arboreally. (Steven O. Shattuck, unpublished)

Identification

Bolton (2007) - A member of the T. cedarensis complex in the Technomyrmex albipes group. This taxon was originally described as a variety of Technomyrmex albipes, but cedarensis is a separate, strictly Australian species that has larger, more posteriorly placed eyes and setae present on the dorsum of the head behind the level of the eyes.

T. cedarensis is closest related to two other Australian species, Technomyrmex antonii and Technomyrmex australops, which resemble it closely. All three have relatively large, posteriorly placed eyes sculptured head and a single pair of setae on the dorsum of the head behind the level of the posterior margin of the eye. In fact, antonii and cedarensis may be nothing more than colour variants of a single species, so close is the resemblance. They are retained as separate species here but a more detailed investigation of the taxonomy of these two is required. T. australops has even larger eyes than either of these two, and has setae present on the mesonotum.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

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 New General Catalogue, a catalogue of the world's ants.

  • cedarensis. Technomyrmex albipes var. cedarensis Forel, 1915b: 85 (w.q.) AUSTRALIA. Raised to species: Bolton, 2007a: 112.

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 2.6 - 2.9, HL 0.64 – 0.74, HW 0.56 - 0.68, SL 0.62 - 0.78, PW 0.39 - 0.50, WL 0.84 - 0.96 (18 measured). Indices: CI 86 - 92, SI 107 - 115, OI 29 - 32, EPI 104 - 120, DTI 120 133.

Frontal carina with 2 setae: in profile the posterior at about the level of the anterior margin of the eye. Dorsum of head posterior to this with only a single pair of setae, in profile located between the level of the posterior margin of the eye and the posterior margin of the head; all these setae are shorter than the maximum diameter of the eye. With head in full-face view the eyes relatively large, located just behind the midlength of the sides and their outer margins break the outline of the sides; also in full-face view the posterior margin is not indented medially, instead the margin is transverse to evenly and very shallowly concave medially. Number of setal pairs on mesosoma: pronotum 1 - 2 (usually 2); mesonotum 0; propodeal dorsum 0; lateral margins of propodeal declivity sometimes 0, but often 1 - 2 present, short. Mesonotal dorsum in profile evenly convex. Propodeal dorsum short, shorter than depth of declivity to the spiracle, the dorsum and declivity meet in an angle. Gastral tergites 1 - 4 each with numerous setae present; longest setae on the first tergite are shorter than the maximum diameter of the eye. Head, mesosoma, petiole and gaster usually a uniform dark brown. On middle and hind legs the coxae, femora and tibiae are usually the same shade as the mesosoma; trochanters and tarsi are paler, usually dull yellow. In some workers the coxae are lighter than the mesosoma and femora, the femora being intermediate in shade between the lighter coxae and darker mesosoma.

Type Material

Bolton (2007) - Syntype workers, Australia: Queensland, Cedar Creek, iii.l913, no. 169 (Mjoberg); syntype queen, same locality but iv.19lJ, no. 115 (Mjoberg) (Musee d'Histoire Naturelle Genève) [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.