Gnamptogenys acuminata

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Gnamptogenys acuminata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. acuminata
Binomial name
Gnamptogenys acuminata
(Emery, 1896)

Gnamptogenys acuminata casent0179946 p 1 high.jpg

Gnamptogenys acuminata casent0179946 d 3 high.jpg

Specimen Label

Found in humid forests, nesting in rotten wood.

Identification

A member of the sulcata complex (in the sulcata subgroup of the sulcata species group). The acute posterior tooth on the petiolar node, combined with longitudinal costulae on the declivitous propodeal face, seem to provide the most reliable distinction from Gnamptogenys tortuolosa. Color in G. acuminata is not so variable but light-pigmented forms can occasionally be found. The mesometepisternal suture is usually absent.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia, Brazil (type locality), Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Not much is known about the the biology of Gnamptogenys acuminata. We can speculate that the biology of this species is similar to other species of the genus. Gnamptogenys are predatory ponerine ants that inhabit tropical and subtropical mesic forests. Nesting is typically at ground level in rotten wood or leaf litter. Some exceptions include species that are arboreal, a dry forest species and species that nests in sandy savannahs. Colony size tends to be, at most, in the hundreds. Queens are the reproductives in most species. Worker reproduction is known from a few species in Southeastern Asia. Generalist predation is the primary foraging/dietary strategy. Specialization on specific groups (millipedes, beetles, other ants) has developed in a few species.

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • acuminata. Ectatomma (Gnamptogenys) acuminatum Emery, 1896g: 50 (w.q.) BRAZIL. Combination in Gnamptogenys: Brown, 1958g: 227.

Description

Mandibles subtriangular; longitudinal costulae on mesosoma and declivitous propodeal face; transverse sutures weak, visible only with certain angles of light; body dark brown to black; coxae and basal two-thirds of femora testaceous to brown-testaceous; tibiae, apex of femora, antenna and mandibles brown.

References