Strumigenys prospiciens

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Strumigenys prospiciens
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. prospiciens
Binomial name
Strumigenys prospiciens
Emery, 1906

Strumigenys prospiciens casent0178640 profile 1.jpg

Strumigenys prospiciens casent0178640 dorsal 1.jpg

Specimen labels

The only ecological information given with the small number of known specimens is that one specimen was found in a forest.

Identification

A member of the mandibularis complex in the Strumigenys mandibularis-group.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina (type locality), Bolivia, Brazil, Paraguay, Peru, Venezuela.


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.

  • prospiciens. Strumigenys smithi subsp. prospiciens Emery, 1906c: 167, fig. 26 (w.) ARGENTINA. Brown, 1953f: 109 (q.). Junior synonym of smithii: Forel, 1911e: 263; of mandibularis: Emery, 1924d: 322. Revived from synonymy and raised to species: Brown, 1953f: 108. See also: Bolton, 2000: 537.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Bolton (2000) - TL 3.1-3.3, HL 0.75-0.81, HW 0.60-0.64, CI 76-80, ML 0.42-0.45, MI 53-57, SL 0.50-0.56, SI 82-88, PW 0.39-0.44, AL 0.80-0.87 (10 measured).

Characters of mandibularis-complex. Proximal preapical tooth located about at the midlength of the inner mandibular margin; may be exactly at midlength or fractionally proximal or distal of it. Proximal preapical tooth usually longer than distance separating it from distal preapical tooth. Outer margin of mandible moderately curved outward at full closure. Propodeal declivity in profile short, with an upper and a lower tooth or lobe, one or both of which may be triangular or low and blunt; the two approximated and linked by a short lamella. Disc of postpetiole reticulate-punctate, approximately as broad as long to broader than long. First gastral tergite with fine flagellate hairs arising all over the sclerite, not restricted to basal third or less. Basigastral costulae absent or at most so tiny that they scarcely project beyond the limbus.

Type Material

Bolton (2000) - Holotype worker, ARGENTINA: Misiones, Puerto Piray (F. Silvestri) (Museo Civico di Storia Naturale, Genoa) [not seen].

References

  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 537, catalogue)
  • Brown, W. L., Jr. 1953g. Revisionary studies in the ant tribe Dacetini. American Midland Naturalist. 50:1-137. PDF (page 109, queen described; page 108, revived from synonymy, and raised to species)
  • Emery, C. 1906c [1905]. Studi sulle formiche della fauna neotropica. XXVI. Bull. Soc. Entomol. Ital. 37: 107-194 (page 167, fig. 26 worker described)
  • Emery, C. 1924f [1922]. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C: 207-397 (page 322, junior synonym of mandibularis)
  • Forel, A. 1911g. Die Ameisen des K. Zoologischen Museums in München. Sitzungsber. Math.-Phys. Kl. K. Bayer. Akad. Wiss. Münch. 11: 249-303 (page 263, junior synonym of smithii)