Strumigenys nimravida

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

Strumigenys nimravida casent0900053 p 1 high.jpg

Strumigenys nimravida casent0900053 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Strumigenys nimravida.

Identification

A member of the Strumigenys thuvida-group. Closely related to Strumigenys belial and Strumigenys ravidura but distinguished by the presence of a humeral hair and standing pilosity on the head, alitrunk and gaster in nimravida and their absence in the other two. S. nimravida is also closely related to the West African Strumigenys tukulta, but that species lacks standing hairs on the cephalic dorsum and lacks projecting hairs on the dorsolateral margins of the head.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Equatorial Guinea (type locality).

Check distribution from AntMaps.

Distribution based on specimens

Loading map...

The above specimen data are provided by AntWeb. Please see Strumigenys nimravida for further details

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.

  • nimravida. Pyramica nimravida Bolton, 2000: 332 (w.) EQUATORIAL GUINEA. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 125

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 1.9, HL 0.50, HW 0.35, CI 70, ML 0.11, MI 22, SL 0.21, SI 60, PW 0.23, AL 0.52. Dorsal and outer surfaces of mandibles, clypeus and entire cephalic dorsum densely clothed with flat appressed scale-like hairs, diameter of hairs greater than the distance separating them. Dorsolateral margin of head with 1-2 laterally projecting short, simple stiff hairs; at least one near occipital corner and may be another in apicoscrobal position. With head in profile a pair of short, stiff standing hairs present close to occipital margin. Pronotal humerus with a stiff simple hair. Promesonotum with very sparse, widely scattered ground-pilosity of a few narrowly spatulate hairs; scale-like hairs similar to those on head are absent from promesonotum, petiole node and disc of postpetiole. Mesonotum with 2 pairs of short simple standing hairs. First gastral tergite with erect short simple hairs and a few minute hairs that are appressed and very narrowly spatulate. Cephalic dorsum finely superficially reticulate-punctate and with some very weak rugulae, but the sculpture mostly obscured by the scale-like pilosity. Remainder of body unsculptured and smooth. Ventral spongiform lobe of postpetiole massive; in dorsal view projecting farther forward than the anterior margin of the disc.

Paratype. HL 0.50, HW 0.34, CI 68, ML 0.12, MI 24, SL 0.20, SI 59.

Type Material

Holotype worker, Equatorial Guinea: Bioko, nr Rio Tepo, 1500 m., 29.iii.1999 (K. Jackson) (The Natural History Museum).

Paratype. 1 worker with same data as holotype (BMNH).

References

  • Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria”. 99:1-191.
  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 332, worker described)