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Strumigenys rabesoni
| Strumigenys rabesoni | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. rabesoni |
| Binomial name | |
| Strumigenys rabesoni Fisher, 2000
| |
Known from more than 20 collections, most from mesic habitats, with all taken from litter-samples.
Identification
Bolton (2000) - A member of the dexis complex in the Strumigenys dexis-group. S. rabesoni forms a close species pair with gorgon within the dexis-complex of this group. Characters isolating rabesoni are discussed under Strumigenys gorgon, with further comments under dexis.
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: -13.998° to -13.99833°.
| 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
Worker
Images from AntWeb
   
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| Paratype of Strumigenys rabesoni. Worker. Specimen code casent0005626. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
   
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| Paratype of Strumigenys rabesoni. Worker. Specimen code casent0005627. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
   
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| Paratype of Strumigenys rabesoni. Worker. Specimen code casent0005628. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
Queen
Images from AntWeb
   
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| Paratype of Strumigenys rabesoni. Queen (alate/dealate). Specimen code casent0006034. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- rabesoni. Strumigenys rabesoni Fisher, in Bolton, 2000: 643 (w.q.) 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 2.3, HL 0.61, HW 0.53, CI 87, ML 0.14, MI 23, SL 0.26, SI 49, PW 0.33, AL 0.64. Characters of dexis-complex. With head in full-face view the dorsal surfaces of the occipital lobes without broad spoon-shaped hairs similar in shape and size to those projecting from the upper scrobe margins. Punctures on vertex broad, numerous and crowded, the diameter of each puncture greater than the distance separating one puncture from another. Eye with 8 om matidia in total. Pronotum distinctly broader than long in dorsal view, with scattered punctures on an otherwise smooth surface. Petiole node in dorsal view broader than long (discounting spongiform tissue). Disc of postpetiole smooth. Basigastral costulae fine and faint, but extending back over at least the basal quarter of the tergite.
Paratypes. TL 2.3-2.5, HL 0.60-0. 66, HW 0.52-0.58, CI 84-89, ML 0.13-0.16, MI 22-24, SL 0.26-0.29, SI 48-52, PW 0.32-0.38, AL 0.64-0.70 (10 measured). As holotype but eye with 7-10 ommatidia in total.
Measurements of this material extends the range shown by the type-series: HL 0.60-0.65, HW 0.54-0.59, CI 88-99, ML 0.12-0.15, MI 20-23, SL 0.28-0.31, SI 48-55 (3 measured).
Type Material
Holotype worker, Madagascar: 9.2 km. WSW Befingotra, Res. Anjanaharibe-Sud, 14°45'S, 49°28'E, 1200 m., 9.xi.1994, sifted litter (leaf mold, rotten wood) montane rainforest, #1192 (33)-1 (B. L. Fisher) (Museum of Comparative Zoology).
Paratypes. 11 workers and 3 queens (dealate) with same data as holotype but coded (2)-1, (3)-1, (9)-1, (11)-1, (39)-1, (40)-1, (46)-1, (47)-1, (49)-2; 1 worker and 1 queen (dealate) with same data as holotype but 1280 m., 5.xi.1994, #1158 (17)-1 and #1158 (22)-1 (B. L. Fisher) (South African Museum, 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 643, worker described)
References based on Global Ant Biodiversity Informatics
- Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
- 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.
- Fisher, B. 2002. Ant diversity patterns along an elevational gradient in the Reserve Speciale de Manongarivo, Madagascar. in Gautier, L. and S.M. Goodman, editors, Inventaire Florestique et Faunistique de la Reserve Speciale de Manongarivo (NW Madagascar)