Strumigenys peraucta

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to navigation Jump to search
Strumigenys peraucta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. peraucta
Binomial name
Strumigenys peraucta
Bolton, 2000

Strumigenys peraucta casent0900812 p 1 high.jpg

Strumigenys peraucta casent0900812 d 1 high.jpg

Specimen Labels

With the exception of a specimen label noting secondary vegetation, nothing is known about the biology of Strumigenys peraucta.

Identification

Bolton (2000) - A member of the godeffroyi complex in the Strumigenys godeffroyi-group. Very closely related to Strumigenys lewisi and Strumigenys geminata; best separated from them by the characters given in the key and as noted under Strumigenys godeffroyi.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Oriental Region: India (type locality).

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Strumigenys were once thought to be rare. The development and increased use of litter sampling methods has led to the discovery of a tremendous diversity of species. Many species are specialized predators (e.g. see Strumigenys membranifera and Strumigenys louisianae). Collembola (springtails) and other tiny soil arthropods are typically favored prey. Species with long linear mandibles employ trap-jaws to sieze their stalked prey (see Dacetine trap-jaws). Larvae feed directly on insect prey brought to them by workers. Trophallaxis is rarely practiced. Most species live in the soil, leaf litter, decaying wood or opportunistically move into inhabitable cavities on or under the soil. Colonies are small, typically less than 100 individuals but in some species many hundreds. Moist warm habitats and micro-habitats are preferred. A few better known tramp and otherwise widely ranging species tolerate drier conditions. Foraging is often in the leaf litter and humus. Workers of many species rarely venture above ground or into exposed, open areas. Individuals are typically small, slow moving and cryptic in coloration. When disturbed individuals freeze and remain motionless. Males are not known for a large majority of species.

Castes

Nomenclature

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

  • peraucta. Strumigenys peraucta Bolton, 2000: 797 (w.) INDIA.

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 2.5, HL 0.61, HW 0.43, CI 70, ML 0.28, MI 46, SL 0.40, SI 93, PW 0.26, AL 0.64. Characters of godeffroyi-complex. Cephalic dorsum with pair of erect hairs closest to midline on occipital margin short stiff and erect, straight to shallowly evenly curved but the apical half not abruptly angled anteriorly nor looped. With head in full-face view the dorsolateral margin posterior to the flagellate apicoscrobal hair has a series of 2-3 stiffly projecting hairs. These hairs contrast with the marginal hairs anterior to the flagellate hair as they are more cylindrical (i.e. not spatulate), more elevated and less strongly curved anteriorly. Ground-pilosity on cephalic dorsum almost reclinate, in profile not elevated, each hair strongly curved basally and main length of hair-shaft parallel to the surface or even inclined or curved back down toward the surface. Ground-pilosity on pronotal dorsum sparse and dilute, not appearing as a pelt. Dorsum and side of pronotum entirely reticulate-punctate. Dorsum of pronotum with a pair of erect hairs in addition to the humeral pair. Pleurae and side of propodeum mostly to entirely smooth, any reticulate-punctate sculpture present is confined to periphery. Propodeal declivity with a broad and very conspicuous lamella. Propodeal teeth visible at dorsal apex of lamella but entirely confluent with it. Disc of postpetiole unsculptured. Basigastral costulae conspicuous but not extending half the length of the tergite.

Paratypes. TL 2.4-2.5, HL 0.59-0.62, HW 0.41-0.43, CI 67-71, ML 0.28-0.30, MI 45-48, SL 0.38-0.41, SI 90-95, PW 0.24-0.26, AL 0.62-0.65 (8 measured).

Type Material

Holotype worker, India (07): Goa, Distr. Quepem, Sulcoma, 200-400 mH., 13.i.1997, no. 78 (A. Schulz & K. Vock) (Naturhistorisches Museum Wien, Vienna).

Paratypes. 5 workers with same data as holotype; 6 workers, India (04): Goa, Distr. Canacona, Cortigao Sanctuary, 100 mH., 6-10.i.1997, no. 40 (A. Schulz & K. Vock); 4 workers, India (05): Goa, Distr. Sanguem, vic. Anvoldem, E Bhagwan Mahareer Sanctuary, 500 mH., 11.i.1997, no. 51 (A. Schulz & K. Vock) (NHMW, The Natural History Museum).

References