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Strumigenys diota
| Strumigenys diota | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. diota |
| Binomial name | |
| Strumigenys diota Fisher, 2000
| |
Sampled from a three types of wet forest, Strumigenys diota has been collected from litter samples, rotten logs and under the bark of a live tree.
Identification
Bolton (2000) - A member of the diota complex in the Strumigenys scotti-group. S. diota is distinguished from other Malagasy species of the scotti-group by having the pronotal humeral hair absent and the inner margin of mandible without a translucent lamina. The narrow and relatively long mandibles and long scapes also help identify this species.
Keys including this Species
Distribution
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
Images from AntWeb
   
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| Holotype of Strumigenys diota. Worker. Specimen code casent0005546. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by MCZ, Cambridge, MA, USA. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- diota. Strumigenys diota Fisher, in Bolton, 2000: 676, fig. 400 (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 2.9, HL 0.67, HW 0.45, CI 67, ML 0.38, MI 57, SL 0.52, SI 115, PW 0.28, AL 0.76. Characters of diota-complex. Mandibles in full-face view with outer margins shallowly and evenly convex, width approximately constant from the level of the proximal preapical tooth to near the base. Upper scrobe margins evenly diverging posteriorly, shallowly convex, not bordered by a rim or flange, the eyes clearly visible in full-face view. Maximum diameter of eye about equal to or slightly greater than maximum width of scape, with 4-5 ommatidia in longest row. Scape long, slender and subcylindrical, only very feebly curved near base; hairs on leading edge small and slender, slightly flattened or spoon-shaped apically. Cephalic dorsum densely clothed with short broad flattened hairs which appear scale-like to spatulate in full-face view. The upper scrobe margin fringed with a row of hairs which are the same as those on the dorsum and about equal in size to those on the leading edge of the scape. Cephalic dorsum with 6 standing remiform to clavate hairs arranged in a transverse row of 4 close to the occipital margin and a more anteriorly situated pair. Pronotal humeral hair absent; humeral angles rounded. Anterior margin of mesonotum with a pair of stout clavate hairs. Propodeum with a pair of narrow spatulate hairs immediately anterior of propodeal spines. Ground-pilosity of dorsal alitrunk of short curved broadly spatulate hairs which decrease in density posteriorly on the propodeum. Dorsum of alitrunk in outline convex anteriorly and more or less flat posteriorly; posterior portion of mesonotum slightly depressed below the anterior margin of propodeum. Anterior mesonotum with a narrow carina above the mesothoracic spiracle. Propodeal tooth broadly triangular and pointed apically; lamella on declivity narrow. Alitrunk dorsum and sides reticulate-punctate. Disc of postpetiole conspicuously broader than long, shiny with longitudinally carinate sculpture. Ventral spongiform tissue of petiole and postpetiole moderately developed. Petiole with a weakly developed lateral lobe. Lateral lobe of postpetiole, in dorsal view, only very slightly projecting beyond the lateral outline of the disc. Base of first gastral tergite with sharply defined costulae radiating on each side of a broad central clear area. Dorsal surfaces of petiole, postpetiole and gaster with standing remiform to broadly clavate hairs which are thickened apically. Colour dull yellowish brown.
Paratypes. TL 2.5, HL 0.57, HW 0.39, CI 68, ML 0.31, MI 55, SL 0.43, SI 111, PW 0.24, AL 0.62 (1 measured). As holotype.
Type Material
Holotype worker, Madagascar: 6.5 km. SSW Befingotra, Res. Anjanaharibe-Sud, 14°45'S, 49°30' E, 875 m., 19.x.1994, sifted litter (leaf mold rotten wood), rainforest #1070 (42)-20 (B. L. Fisher) (Museum of Comparative Zoology).
Paratype. 1 worker with same data as holotype but coded (4)-9 (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 676, 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.