Strumigenys sutrix

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Strumigenys sutrix
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. sutrix
Binomial name
Strumigenys sutrix
Bolton, 2000

Strumigenys sutrix casent0900919 p 1 high.jpg

Strumigenys sutrix casent0900919 d 1 high.jpg

Specimen Labels

Known from just a few collections, with records stating one was from a rainforest and another noting it was taken in a pitfall-trap.

Identification

Bolton (2000) - A member of the Strumigenys emmae-group. Very close to Strumigenys emmae but larger, with a narrower head and longer scapes (compare measurements). The leading edge of the scape in Strumigenys sutrix is quite evenly convex, not forming an obtusely angular lobe as in emmae. Also, the disc of the postpetiole in sutrix, in dorsal view, is narrower and more convex so that the lateral margins of the disc do not have conspicuously protruding spongiform tissue visible.

Identification Keys including this Taxon

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.

  • sutrix. Strumigenys sutrix Bolton, 2000: 953 (w.) AUSTRALIA.

Type Material

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 2.0, HL 0.55, HW 0.40, CI 73, ML 0.17, MI 31, SL 0.28, SI 70, PW 0.25, AL 0.54. Exposed length of fully closed mandible less than width of anterior clypeal margin. Preapical dentition of mandible a spiniform preapical tooth and a low blunt welt between this and the apicodorsal tooth. Antenna with 4 segments; second funicular segment distinctly longer than broad. Cephalic dorsum with very broadly spoon-shaped or orbicular hairs; upper scrobe margin fringed with similar hairs and with a more slender apicoscrobal hair that is short clavate or narrowly spoon-shaped. Occipital margin of head without short erect hairs. Leading edge of scape shallowly convex but not expanded into an obtuse angle in the median third of its length. Pronotal humeral hair stoutly clavate. Ground-pilosity of pronotal dorsum as head but the hairs tending to be smaller. Mesonotum without erect hairs. Promesonotal dorsum reticulate-punctate, without longitudinal rugulae. Disc of postpetiole usually with weak sculpture at least in part. Sides of postpetiole disc in dorsal view bare, without projecting spongiform tissue but with a few posteriorly curved spoon-shaped hairs. First gastral tergite with short suberect to erect stubbly hairs that are spatulate or broadened and flattened apically. Basigastral costulae longer than postpetiole disc.

PARATYPE. TL 2.0, HL 0.54-0.55, HW 0.39-0.40, CI 71-74, ML 0.17, MI 30-31, SL 0.28-0.29, SI 70-73, PW 0.25, AL 0.54-0.55 (4 measured).

References

  • Bolton, B. 2000. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028 (page 953, worker described)