Gnamptogenys andina

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

Gnamptogenys andina casent0281513 p 1 high.jpg

Gnamptogenys andina casent0281513 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Gnamptogenys andina.

Identification

A member of the strigata complex (in the strigata subgroup of the striatula species group). This species is near Gnamptogenys strigata and though the differences are not striking, they seem consistent enough to define a species. G. strigata is smaller (HW 0.74-0.80); WL 1.20-1.34 mm), with relatively larger eyes (OI 0.17-0.20) and shorter scapes (0.70-0.78 mm) and dorsal propodeal face in lateral view is usually depressed below the rest of the mesosomal dorsum. It is probably sympatric with Gnamptogenys andina in part of its range, having been found only 51 km away from the andina type locality. The male of strigata has a median area of rugosity on the mesonotum and totally rugulose propodeum. Individuals of the Ecuadorean sample are slightly larger than the Colombian specimens.(Lattke 1995)

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Colombia (type locality), Ecuador.


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 andina. 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

Queens have not been collected.

Nomenclature

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

  • andina. Gnamptogenys andina Lattke, 1995: 156, figs. 39, 40 (w.m.) COLOMBIA.

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

Description

Worker

Holotype (Paratypes) measurements: HL 1.04 (1.02-1.08); ML 0.40 (0.26-0.36); HW 0.88 (0.82-0.94); SL 0.86 (0.86-0.92); ED 0.12 (0.10-0.14); WL 1.36 (1.36-1.60) mm; CI 0.85 (0.83-0.90); SI 0.98 (0.93-1.10); OI 0.14 (0.11-0.17) n = 7.

Typical striatula group member: Roughly costulate sculpture. Vertexal margin concave in frontal view; clypeal costulae extend slightly onto anterior lamella; mandibles triangular and mostly striate except for smooth and shining lamellate basal corner and margin of chewing border; compound eyes relatively small; in lateral view dorsal propodeal margin not notably depressed below rest of mesosomal dorsum; propodeal spiracle slightly elevated above rest of sculpture and at edge of declivitous surface; petiolar node posteriorly inclined; subpetiolar process subquadrate, typical of strigata subgroup. Longitudinal costulae present on declivitous postpetiolar face. Weak transverse costuiae on postpetiolar ventrum.

Fairly abundant standing hairs on body, but very sparse appressed pubescence. Legs smooth and shining, except for numerous piligerous punctures. Metacoxal dorsum with a well-developed denticle. Body dark brown to black with yellowish legs.

Male

Longitudinal costulae on cephalic dorsum; mandibles triangular and costulate; pronotum smooth and shining with piligerous punctures; pronotum with piligerous punctures; mesonotum mostly smooth and shining except for narrow anterior band of transverse striae; declivitous propodeal face with longitudinal rugulae that do not reach anterior dorsal face; gaster smooth and shining.

Type Material

Holotype worker. Colombia, Valle: Parque Farallones de Cali, El Topacio, 20 km NW Cali, 76°37'N 2 °30'W, 1550 m, 31-XII-1981, J. Lattke No. 220. Deposited in Instituto de Zoologia Agricola. Paratypes (all from Colombia, Valle): (1). 22 workers from tye same nest series as the holotype. (2) 21 workers, same data as holotype except collection numbers 220, 214, 218. (3). 18 workers, Cali-Buenaventura road, km 21 , 15 km NE Cali, 1300-2000 m, 1-X-1975, J. Lattke, leg. (4). 6 workers, CVC station near Pance, 15 km W Cali, 1700 m, 12-XII-1975, J. Lattke, leg.

Etymology

The name alludes to the Andes, a portion of which is inhabited by this species.

References