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Strumigenys tegar
| Strumigenys tegar | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. tegar |
| Binomial name | |
| Strumigenys tegar Fisher, 2000
| |
Collection records show this is a wide ranging Madagascar species with broad habitat tolerances. It has been found in rotten downed wood, foraging on low vegetation and in litter samples.
Identification
Bolton (2000) - A member of the chroa complex in the Strumigenys scotti-group. S. tegar is distinguished from other species in the chroa-complex by its larger size and densely reticulate-punctate postpetiole disc. See under Strumigenys cabira for further discussion.
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: -20.76833333° to -20.777°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Malagasy Region: Madagascar (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
| Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
| Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Biology
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- tegar. Strumigenys tegar Fisher, in Bolton, 2000: 695 (w.) MADAGASCAR.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Holotype. TL 3.1, HL 0.75, HW 0.58, CI 77, ML 0.35, MI 46, SL 0.48, SI 83, PW 0.35, AL 0.82. Characters of chroa-complex. Mandibles almost straight and at full closure parallel except at base. Mandible with a narrow lamella on inner margin that extends from base to proximal preapical tooth; in dorsal view, inner margin of lamella shallowly and evenly convex and at full closure more or less touching at midlength. Upper scrobe margin evenly and shallowly convex in full-face view, not bordered by a rim or flange; eyes visible. Maximum diameter of eye slightly greater than maximum width of scape, with 5-6 ommatidia in longest row (left eye absent in holotype). Scape subcylindrical, shallowly and gently curved; hairs on leading edge spatulate or spoon-shaped. Cephalic dorsum densely clothed with curved narrow spatulate to spoon-shaped ground-pilosity, the upper scrobe margin fringed with hairs which are the same shape and size as those on the dorsum. Cephalic dorsum with 4 clavate standing hairs arranged in a transverse row close to the occipital margin. Pronotal humeral hair absent. Mesonotum with one pair of erect clavate hairs, located at anterior margin. Propodeum with 1 pair of short, clavate, posteriorly curved hairs immediately anterior of propodeal spines. Dorsal alitrunk with ground-pilosity as on head. Dorsum of alitrunk in outline very shallowly convex anteriorly and more or less flat posteriorly; posterior portion of mesonotum only very slightly depressed below the anterior margin of propodeum. Anterior mesonotum with a narrow carina above mesothoracic spiracle. Propodeal tooth broadly triangular, short, lamellate, pointed apically, and subtended by a narrow lamella on declivity. Alitrunk dorsum and sides densely reticulate-punctate; petiole node and postpetiole disc reticulate-punctate. In profile the petiole with a straight ventral strip that is less than the maximum width of mandible. Postpetiole with weakly developed ventral and lateral spongiform lobes. Basigastral costulae fine and numerous, without a central clear area, remainder of gaster smooth and shiny. Dorsal surfaces of petiole, postpetiole and gaster with standing clavate to remiform hairs. Anterior half of first gastral sternite without suberect hairs. Colour light brown.
Type Material
Holotype worker, Madagascar: Provo Fianarantsoa, 29 km. SSW Ambositra, Ankazomivady, 20°46.6'S, 47°9.9'E, 1700 m., 7.i.1998, sifted litter (leaf mold, rotten wood), montane rainforest #1590 (32)-1 (B. L. Fisher) (Museum of Comparative Zoology).
References
- Fisher, B.L. 2000. The Malagasy fauna of Strumigenys. Pp. 612-696 in: Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 695, worker described)
References based on Global Ant Biodiversity Informatics
- Fisher B. L. 2003. Formicidae, ants. Pp. 811-819 in: Goodman, S. M.; Benstead, J. P. (eds.) 2003. The natural history of Madagascar. Chicago: University of Chicago Press, xxi + 1709 pp.