Gnamptogenys ilimani

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Gnamptogenys ilimani
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. ilimani
Binomial name
Gnamptogenys ilimani
Lattke, 1995

Gnamptogenys ilimani P casent0179988.jpg

Gnamptogenys ilimani D casent0179988.jpg

Specimen Label

Nothing is known about the biology of Gnamptogenys ilimani.

Identification

A member of the strigata complex (in the strigata subgroup of the striatula species group). This species is nearest to Gnamptogenys strigata and Gnamptogenys pittieri but they are separable on several on several accounts: the posterior petiolar node face is not sharply set off and has raised costulae; in dorsal view their node is anteriorly convex, not straight; standing hairs on the body and especially the scapes are abundant, scape pilosity is longer. In G. pittieri the anterior transverse costulae of the pronotum curve around gently at the sides. (Lattke 1995)

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia (type locality).

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 ilimani. 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.

  • ilimani. Gnamptogenys ilimani Lattke, 1995: 171 (w.q.) BOLIVIA.

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

Description

Worker

Holotypes (Paratypes) measurements: HL 0.90 (0.84-0.90); HW 0.78 (0.72-0.78); ML 0.30 (0.26-0.32); ED 0.14 (0.14-0.18); SL 0.70 (0.70-0.72); WL 1.20 (1.12-1.20) mm; CI 0.87 (0.84-0.88); SI 0.90 (0.92-0.97); OI 0.19 (0.18-0.27) n=5.

Coarsely costulate strigata group species. With head in frontal view vertexal margin convex; anterior pronotal face with 3-4 costulae that sharply bend back laterally to become longitudinal; declivitous propodeal face with longitudinal costulae; node anteroposteriorly compressed, its posterior face sharply marginate laterally with a flat to slightly concave surface and effaced sculpture; anterior postpetiolar face with 2-3 transverse costulae, rest longitudinal; postpetiolar sternum with longitudinal costulae; lateral mesocoxal face with oblique, rough costulae and that of metacoxae with rough rugulae; metacoxal tooth low and triangular. Body black with yellow-brown legs and scapes; abundant appressed pilosity on legs and scapes, but no standing hairs.

Queen

Measurements: HL 0.88 (0.88); HW 0.72 (0.74); ED 0.20 (0.18); SL 0.72 (0.72); WL 1.28 (1.20) n = 2. Differences from workers are the usual; caste differences, though the node is more disciform.

Paratype Specimen Labels

Type Material

Holotype worker. Bolivia, 22 km N Caranavi, Vivero Ilimani, 1700 m, 22-VI-81, C. Kugler, leg. Primary forest clearing with Cinchona, nest in rotten wood. Deposited in the Instituto de Zoologia Agricola. Paratypes: paranidotypic workers from the same nest as the holotype. Deposited in each of the following: The Natural History Museum, Los Angeles County Museum of Natural History, MUSP, Museum of Comparative Zoology, MIZA.

Etymology

The species name alludes to the type locality.

References