Strumigenys veddha

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search
Strumigenys veddha
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. veddha
Binomial name
Strumigenys veddha
De Andrade, 2007

Strumigenys veddha casent0911244 p 1 high.jpg

Strumigenys veddha casent0911244 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Strumigenys veddha.

Identification

Baroni Urbani & De Andrade (2007) - A member of the prosopis complex in the Strumigenys lyroessa-group. Differing from the six species of this complex by the CI = 73.3 instead of .2. 77, by the cephalic dorsum without standing hairs and by the much more superficial sculpture on the head and mesosoma, and, in particular, from the species Strumigenys loricata, Strumigenys panopla, Strumigenys prosopis and Strumigenys strenosa by the petiole with a pair of standing hairs, and from Strumigenys anchiplex and Strumigenys propinqua by the smaller values of SI < 57 instead of .2. 60, by the lack of pronotal humeral hairs and by the first gastral tergite with basal and apical pairs of erect hairs only.

Among the 6 species of the prosopis-complex S. veddha resembles especially Strumigenys loricata. veddha and loricata share the cephalic dorsum finely reticulate-punctuate and the promesonotum with sculpture similar to the one on the head but less impressed. But veddha differs from loricata mainly by the longer head (CI = 73.3 instead of ≥ 82) and by the first gastral tergite with two pairs of stiff hairs, one near to the base and another near to the apex (loricata has no standing hairs on the first tergite). Among the six species of the prosopis-complex only veddha and panopla have the first gastral tergite with one pair of stiff hairs near the base and another pair near the apex.

Distribution

Distribution based on Regional Taxon Lists

Oriental Region: Sri Lanka (type locality).

Check distribution from AntMaps.

Loading map...

Check specimen 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.

  • veddha. Strumigenys veddha De Andrade, in Baroni Urbani & De Andrade, 2007: 142, fig. 49 (w.) SRI LANKA.

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

Description

Worker

TL 2.12; HL 0.58; HW 0.425; SL 0.24; ML 0.17; EL 0.06; WL 0.56; CI 73.3; SI 56.5; MI 29.3.

Head strongly converging anteriorly, with round vertexal corners and moderately flattened dorsoventrally. Frontal lobes weakly expanded and convex. Antennal fossae ventrally with a developed carina visible in full-face view, straight, covering the lower margin of the scrobes and ending in front of the eyes. Eyes small, with 5 ommatidia in the longest row, placed over the ventral margin of the antennal scrobes, and not visible in dorsal view. Scrobe distinct in profile, with marked upper and lower margins only. Lateral clypeal margin gently converging anteriorly to a straight margin. Scapes less than half of the head length, slightly thicker on the posterior half and surpassing the eyes posteriorly. Antennae with six segments. Apical funicular joint longer than the rest of the funiculus. Mandibles short, broad proximally and tapered distally; their outer margin convex basally. Apical fork of the mandible with two spiniform teeth, the apicodorsal one larger; space between the two apical spiniform teeth bearing one intercalary denticle. Preapical dentition consisting of 1 spiniform tooth.

Mesosoma in profile slightly flat and gently sloping posteriorly. Propodeal teeth subtended by a broad lamella.

Petiole with a long neck and round node. Ventral surface of the petiole with a broad spongiform lamina. Petiolar node with posterior sides and posterior margin surrounded by spongiform processes. Postpetiole gently convex in profile. Anterior, lateral and posterior faces of the postpetiole surrounded by spongiform processes broader posteriorly. Ventral surface of the postpetiole with large and dense spongiform process.

Gaster oval and with a few, short costulae. Base of the first gastral tergite and sternite with spongiform pad larger on the tergite.

Sculpture. Head and anterior half of propleurae finely reticulatepunctuate and superficially shining. Mesosomal dorsum and petiolar node largely smooth and shining, with very sparse, faint, minute reticulation-punctuation. Posterior half of the propleurae and remaining pleurae smooth. Postpetiole and gaster smooth and shining.

Pilosity. Head dorsum with appressed, thin, short hairs only. Upper scrobes margin and leading edge of scape with similar but thicker and slightly longer hairs than on the head dorsum. Apicoscrobal hair missing. Mesosoma, petiole, postpetiole and gaster with hairs similar to those on the head dorsum but much sparser. Mesosoma and postpetiole without erect hairs. Petiole with a pair of stiff standing hairs. First gastral tergite with two pairs of erect stiff hairs, one pair near the base, the other near the apex.

Colour. Light yellowish.

Type Material

Holotype worker (unique) from Sri Lanka labelled: Ceylan North central, Alut Oya, 3.11.[19]70, Mussard, Besuchet & Lobl (Musee d'Histoire Naturelle Genève).

Etymology

From the Veddhas, the name of one of the Sri Lanka's indigenous inhabitants. It is used as a noun in apposition.

References