Strumigenys parsauga

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

Strumigenys parsauga inbiocri002279048 p 1 high.jpg

Strumigenys parsauga inbiocri002279048 d 1 high.jpg

Specimen Labels

The one specimen of this species was from a wet forest habitat, from a Winkler sample of sifted leaf litter from the forest floor (Longino, Ants of Costa Rica). A subsequent collection was made from a litter sample in montane moist forest (Panama).

Identification

Bolton (2000) - A member of the Strumigenys alberti-group.

Longino (Ants of Costa Rica) - Mandibles in side view straight, not broadly curved ventrally; mandibles relatively short, subtriangular, much of the apical portion meeting along a serially toothed masticatory margin when closed (former Smithistruma); leading edge of scape with a row of conspicuous projecting curved hairs, of which those distal to the subbasal bend distinctly curve toward the base of the scape; pronotal humeral hair present; ventral surface of petiole in profile with a deep, conspicuous and very obviously spongiform curtain, its maximum depth at least half that of the peduncle and usually more; disc of postpetiole completely unsculptured and glassy smooth; anterior border of clypeus broadly rounded; basal lamella of mandible immediately followed distally by the tooth-row, without a second lamella that extends forward for half the exposed length of the fully closed mandible; mandibles short, MI 19-24; compound eye composed of about 4 facets (approximately 10 facets in nigrescens and fridericimuelleri); promesonotal dorsum without a median longitudinal carina; pronotal dorsum entirely smooth and shining; propodeal dorsum smooth and shining. Similar to Strumigenys fridericimuelleri and Strumigenys nigrescens.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality), Panama.


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 Online Catalogue of the Ants of the World.

  • parsauga. Pyramica parsauga Bolton, 2000: 157 (w.) COSTA RICA. 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 0.52, HW 0.36, CI 69, ML 0.12, MI 23, SL 0.26, SI 72, PW 0.24, AL 0.50. Basal lamella mostly visible in full-face view with mandibles fully closed, the lamella followed immediately by a row of 5 acute triangular teeth; no secondary lamella and no alternation of tall pointed and low rounded teeth. Anterior clypeal margin prominently arched-convex between points where outer margins of closed mandibles intersect anterior clypeal margin. Apicoscrobal hair flagellate, long and fine. Eye very small, with only 2 ommatidia in the longest row and only 4 ommatidia in total. Promesonotal dorsum without a median longitudinal carina, the dorsum and sides of the pronotum unsculptured, smooth and shining. Mesonotum and propodeal declivity reticulate-punctate but dorsum of propodeum smooth. Petiole node in dorsal view smooth, slightly broader than long and with thick, strongly prominent lateral spongiform lobes.

Type Material

Holotype worker, Costa Rica: Provo Limon, Res. Biol. Hitoy-Cerere, 9°40'N, 83°02'W, 500 m., 30.viii.1985, wet forest, ex sifted leaf litter, #970-s (J. Longino) (The Natural History Museum).

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 157, worker described)

References based on Global Ant Biodiversity Informatics

  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/