Technomyrmex mixtus

Every Ant Tells a Story - And Scientists Explain Their Stories Here
Jump to navigation Jump to search
Technomyrmex mixtus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Technomyrmex
Species: T. mixtus
Binomial name
Technomyrmex mixtus
Bolton, 2007

Technomyrmex mixtus casent0249794 p 1 high.jpg

Technomyrmex mixtus casent0249794 d 1 high.jpg

Specimen Labels

Collected from higher elevation forests (rainforest, montane), with one collection being foragers from a roadside and the other from a live Hydnophytum in a recently fallen tree.

Identification

Bolton (2007) - A member of the T. cheesmanae complex in the Technomyrmex albipes group. T. mixtus belongs to a small complex of New Guinea species of the Technomyrmex albipes group that also includes Technomyrmex albicoxis, Technomyrmex cheesmanae and Technomyrmex prevaricus. They are characterised by their relatively rounded, as opposed to distinctly angular, junction of propodeal dorsum and declivity.

A non-paratypic series includes a couple of alate males and a number of worker-queen intercastes in which at least the median ocellus is developed and the mesonotum is somewhat inflated and slightly projects posteriorly.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: New Guinea (type locality).


Distribution based on AntMaps

AntMapLegend.png

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.

  • mixtus. Technomyrmex mixtus Bolton, 2007a: 91, fig. 43 (w.) NEW GUINEA.

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 3.2, HL 0.79, HW 0.72, SL 0.82, PW 0.50, WL 1.08. Indices: CI 91, SI 114, OI 24, EPI 85, DTI 136.

Frontal carina with 2 setae: in profile the first above the torulus and the second at the level of the anterior margin of the eye. Dorsum of head behind this with only one other pair of setae, located about half-way between the level of the posterior margin of the eye and the posterior margin of the head, this pair slightly shorter than the maximum diameter of the eye; posterior margin itself without setae. With head in full-face view the anterior clypeal margin with an extremely feeble median indentation; sides of head convex and the posterior margin shallowly indented medially. Eyes located in front of midlength (EPI above) and their outer margins just fail to break the outline of the sides of the head in full-face view. With mesosoma in profile the mesonotal outline forms a more or less flat shallow slope to the metanotal groove, without a declivitous face posteriorly. Number of setal pairs on mesosoma: pronotum 2 3; mesonotum 2, only about half the length of the main pronotal setae and located posteriorly, just before the metathoracic spiracles; propodeal dorsum 0; lateral margin of propodeal declivity 2 - 3. Propodeum in profile with the dorsum rounding evenly into the declivity, the two surfaces not separated by an angle. Gastral tergites 1 - 4 each with numerous setae, distributed everywhere on the sclerites; maximum length of setae on first gastral tergite only slightly less than the maximum diameter of the eye. Head and mesosoma black, gaster blackish brown. All leg segments except tarsi dark brown to blackish brown, the tarsi dull yellow to brownish yellow. Microreticulate-punctulate sculpture of dorsal head dense and strongly developed.

Paratypes. TL 3.2 - 3.3, HL 0.79 - 0.80, HW 0.72 - 0.73, SL 0.84, PW 0.50 - 0.51, WL 1.10 - 1.14 (2 measured). Indices: CI 91, SI 115 - 117, OI 25, EPI 85 - 88, DTI 135 - 140. As holotype.

Other workers. TL 3.2 - 3.3, HL 0.76 - 0.79, HW 0.71 - 0.73, SL 0.78 - 0.80, PW 0.46 - 0.50, WL 1.02 1.08 (3 measured). Indices: CI 92 - 93, SI 108 - 113,01 24 - 25, EPI 87 - 90, DTI 136 - 139.

Type Material

Holotype worker (top specimen of three on pin), Papua New Guinea: 15 km. NW Mendl, 6.03S, 143.33E, 2200 m., 29.vii.1980, ground forager(s) montane rainfor. edge, roadside, #4632 (P.S. Ward) (Australian National Insect Collection). Paratypes. Two workers (middle and bottom specimens on same pin) with same data as holotype (University of California, Davis).

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.