Strumigenys nageli

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Strumigenys nageli
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. nageli
Binomial name
Strumigenys nageli
Baroni Urbani & De Andrade, 2007

Strumigenys nageli casent0905782 p 1 high.jpg

Strumigenys nageli casent0905782 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Strumigenys nageli.

Identification

Baroni Urbani & De Andrade (2007) - A member of the Strumigenys elongata-group. Resembling Strumigenys spathula but differing from it by the apicoscrobal hairs short and spatulate instead of long and flagellate, by the humeral hairs long and thicker in their distal half, instead of long and filiform and by the spatulate standing hairs on the gaster, longer and thinner.

S. nageli is very similar to spathula from Venezuela, Trinidad and Central America but the characters listed in the diagnosis permit easy separation of the two species.

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Ecuador (type locality).


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • nageli. Strumigenys nageli Baroni Urbani & De Andrade, 2007: 162, fig. 56 (w.) ECUADOR.

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

Description

Worker

TL 2.44-2.58; HL 0.63-0.66; HW 0.49-0.50; SL 0.45; ML 0.38-0.40; EL 0.05-0.06; WL 0.60-0.65; CI 75.7-77.7; SI 90.0-91.8; MI 60.3-60.6.

Head sides converging anteriorly, with round vertexal corners. Frontal lobes weakly expanded and convex. Antennal fossae ventrally with a narrow carina visible in full-face view, straight, not covering the lower margin of the scrobes and ending close to the eyes. Eyes small, with 4 ommatidia in the longest row, placed over the ventral margin of the antennal scrobes, and visible in dorsal view. With head in profile the scrobe distinct, with marked upper margin only. Clypeus triangular. Lateral clypeal margin gently converging anteriorly to a straight or gently concave margin. Scapes subcylindrical, about 2/3 of the head length and largely surpassing the eyes posteriorly. Antennae with six joints. Apical funicular joint much longer than the rest of the funiculus. Mandibles elongate. Apical fork of the mandible with two spiniform teeth and without intercalary denticles.

Mesosoma in profile weakly convex anteriorly and sloping posteriorly to the convex basal face of the propodeum. Propodeal teeth pointed. Declivous face of the propodeum with a very faint margm.

Petiole with a long neck, the node high and convex dorsally. Ventral surface of the petiole with a narrow lamina on the anterior third. Petiolar node with posterior margin surrounded by spongiform process. Postpetiole convex in profile. Anterior and posterior margins of the postpetiole surrounded by spongiform processes, the process narrow on the anterior margin. Ventral surface of the postpetiole with dense spongiform process.

Gaster oval and with thin, short costulae. Base of the first gastral tergite and sternite with spongiform pad irregular on the sternite.

Sculpture. Head, mesosoma, petiole and postpetiole reticulate-punctuate, this sculpture less marked on the postpetiole. Centre of the lower mesopleurae smooth. Gaster smooth.

Pilosity. Head, mesosoma, petiole and postpetiole with subdecumbent or decumbent, spatulate hairs, very sparse on the mesosoma and rare on the pedicel. Apicoscrobal hair spatulate. Cephalic dorsum with one pair of standing spatulate hairs close to the occipital margin. Humeral hairs long, increasing in width from mid-length to near the apex and apically gently pointed or truncate. Mesonotal dorsum with 1 pair of erect hairs similar to the humeral ones but shorter. Petiole, postpetiole and gaster with erect, long, spatulate hairs very sparse on the pedicel.

Colour. Brown with slightly darker gaster.

Type Material

Holotype worker from Ecuador labelled: Esmeralda, Rioverde, Via San Lorenzo, Km 67, leaf-litter, 22.VIII.2004, C. Baroni Urbani & M. L. de Andrade (Museo de Zoología, Escuela de Biología). Paratypes: 4 workers, same data as the holotype (PUCE, Museo Civico di Storia Naturale, Genoa).

Etymology

This species is named after Prof Dr Peter Nagel.

References