Strumigenys vertigosa

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

Strumigenys vertigosa casent0900875 p 1 high.jpg

Strumigenys vertigosa casent0900875 d 1 high.jpg

Specimen Labels

Known only from the holotype worker, collected from a lowland rainforest litter-sample.

Identification

Bolton (2000) – A member of the koningsbergeri complex in the Strumigenys koningsbergeri-group. See Strumigenys koningsbergeri.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.


Distribution based on AntMaps

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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.

  • vertigosa. Strumigenys vertigosa Bolton, 2000: 855 (w.) BORNEO.

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 2.6, HL 0.75, HW 0.62, CI 83, ML 0.34, MI 45, SL 0.40, SI 65, PW 0.32, AL 0.70. With characters of koningsbergeri-complex. Preocular concavity forms a shallow depression on ventral surface of head. Upper scrobe margins not constricted above eye, only extreme outer arc of eye visible in full-face view, or eye not visible. Depression across posterior vertex of head shallow, weakly developed. Pronotum without a pair of short standing hairs close to anterodorsal margin. Pronotal humeral hair stiff, straight and simple. A single erect pair of hairs on mesonotum. Katepisternum mostly smooth but metapleuron and side of propodeum uniformly reticulate-punctate. Bullae of fem oral glands absent on middle and hind legs. Lamella on propodeal declivity conspicuous. Standing hairs on first gastral tergite simple or slightly expanded and flattened toward the apex.

Paratypes. TL 2.5-2.6, HL 0.71-0.76, HW 0.58-0.62, CI 82-83, ML 0.32-0.34, MI 43-46, SL 0.40-0.41, SI 65-69, PW 0.30-0.32, AL 0.70 (4 measured).

Type Material

Holotype worker, Malaysia: Sarawak, 4th Div., G. Mulu Nat. Pk, RGS Expd., Long Pala, 14.x.1977, lowl. rainforest, leaf litter (B. Bolton) (The Natural History Museum). Paratypes. 4 workers with same data as holotype (BMNH, Museum of Comparative Zoology).

References

  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 855, worker described)