Gnamptogenys nigrivitrea

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

Gnamptogenys nigrivitrea P casent0179962.jpg

Gnamptogenys nigrivitrea D casent0179962.jpg

Nothing is known about the biology of Gnamptogenys nigrivitrea.

Identification

A member of the porcata subgroup (in the striatula species group). The closest species to Gnamptogenys nigrivitrea is Gnamptogenys brunnea, but its well impressed mesometanotal groove, angulate anterolateral pronotal area and depressed apical and basal mandibular margins permit easy separation. (Lattke 1995)

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Colombia (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 nigrivitrea. 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.

  • nigrivitrea. Gnamptogenys nigrivitrea Lattke, 1995: 177, figs. 58, 59 (w.) 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 (paratype) measurements: HL 1.10 (1.10); HW 0.86 (0.82); ML 0.86 (0.82); ED 0.14 (0.12); SL 0.82 (0.84); WL 1.40 (1.36) mm; CI 0.79 (0.79); SI 0.95 (1.02); OI 0.16 (0.15). Head elongate; fairly parallel sided in frontal view; posterior margin slightly concave; clypeal lamella widest medianly, giving it a bluntly pointed aspect; eyes moderately protuberant. Mandibles triangular and shallowly costulate; no trace of mesometanotal suture; pronotum anterolaterally convex; declivitous propodeal face longitudinally costulate; metacoxal tooth triangular; node posteriorly inclined, in lateral view with a broadly convex anterior margin and a bluntly pointed apex which slightly overhangs the posterior margin, in dorsal view with longitudinal costulae; subpetiolar process is an anteriorly projecting lobe; anterior face of postpetiole with 3 transverse costulae, costulation longitudinal on dorsal face; postpetiolar sternum with distinct costulation; scape with few standing hairs and moderate amount of decumbent pilosity. Body black; antennae, legs, metapleural gland area, and gastric apex brown. Coxae very dark brown.

Type Material

Holotype worker: Colombia, Valle: Reserva Forestal de Yotoco, 3°50'N 76°25'W, 42 km N E Cali, 1100-1500 m, 6-I-84, W.P. MacKay, leg. No. 7221. Deposited in Instituto de Zoologia Agricola. Paratype: One worker with same locality data as holotype, deposited in Los Angeles County Museum of Natural History.

Etymology

The species name is derived from the Latin adjectives for black, nigra, and for glassy, vitra, and alludes to the black and shining sculpture.

References