Strumigenys rakkota

Every Ant Tells a Story - And Scientists Explain Their Stories Here
Jump to navigation Jump to search
Strumigenys rakkota
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. rakkota
Binomial name
Strumigenys rakkota
Bolton, 2000

The type was found in a litter sample from an unspecified habitat.

Identification

A member of the dextra complex in the Strumigenys arnoldi-group.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: South Africa (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.

  • rakkota. Strumigenys rakkota Bolton, 2000: 595 (w.) SOUTH AFRICA.

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 l.8, HL 0.45, HW 0.38, CI 84, ML 0.19, MI 42, SL 0.26, SI 68, PW 0.23, AL 0.47. Characters of dextra-complex. Mandibular apical forks without intercalary teeth. Cephalic ground-pilosity on vertex spoon-shaped, conspicuous, broader than hairs that fringe upper scrobe margin; the latter with a row of narrowly spoon-shaped hairs. Six standing hairs present on head, 4 in a transverse row near occipital margin and a pair close to highest point of vertex. Pronotal humeral hair flagellate.

Type Material

Holotype worker, South Africa: Transvaal, Abel Erasmus Pass, 24°27'S, 30°37'E, 22.x.1987, ex litter sample, C 694 (H. G. Robertson) (South African Museum).

References

  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 595, worker described)