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Strumigenys toma
| Strumigenys toma | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. toma |
| Binomial name | |
| Strumigenys toma Fisher, 2000
| |
Known from the type collection, which was found in a grassland litter-sample.
Identification
Bolton (2000) - A member of the alapa complex in the Strumigenys arnoldi-group. S. toma forms a close species pair with Strumigenys dolabra within the arnoldi-group. Characters distinguishing toma are discussed under dolabra.
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: -20.76805556° to -20.775°.
| 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.
- toma. Strumigenys toma Fisher, in Bolton, 2000: 637, fig. 386 (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 1.7, HL 0.42, HW 0.38, CI 91, ML 0.12, MI 27, SL 0.21, SI 56, PW 0.25, AL 0.46. Characters of alapa-complex. Preapical dentition of each mandible a single spiniform tooth. Anterolateral margin of clypeus with a spoon-shaped hair curved medially that is larger than hairs found on anterior margin of clypeus. In full-face view, cephalic dorsum posterior of clypeal margin with broadly scale-like to orbicular hairs on anterior two thirds, extending on to vertex posterior of apex of upper scrobe margin. Upper scrobe margin with broadly scale-like hairs. Pronotal humeral hair absent; mesonotum without standing hairs. In profile, pronotal dorsum shallowly convex; mesonotum with a shallowly concave depression. Propodeal dorsum more or less flat anteriorly, sloping slightly posteriorly before meeting the declivity in a blunt angle without a noticeable tooth. Ventral spongiform tissue well developed and conspicuous on propodeum, petiole and postpetiole. In profile, spongiform lamella on propodeal declivity broad, approximately half the width of ventral spongiform curtain on petiole. Disc of postpetiole covered by a densely punctulate film of spongiform tissue. Basigastral costulae short, sparse and not sharply defined; first gastral tergite covered in punctulate-reticulate to granulate-reticulate sculpture, at least on lateral margins. Hairs on postpetiole and gaster filiform. Color pale brown.
Paratypes. TL 0.42, HL 0.39, HW 0.39, CI 93, ML 0.12, MI 28, SL 0.20, SI 52, PW 0.25, AL 0.48 (1 measured). As holotype.
Type Material
Holotype worker, Madagascar: Provo Fianarantsoa, 28 km. SSW Ambositra, Ankazomivady, 20°46.5'S, 47°10.1'E, 1670 m., 11.i.1998, sifted litter, grassland, #1620 (25)-2 (B. L. Fisher) (Museum of Comparative Zoology).
Paratype. 1 worker with same data as holotype (The Natural History Museum).
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 637, fig. 386 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.