.jpg){kind=logo}
Strumigenys micrans
| Strumigenys micrans | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. micrans |
| Binomial name | |
| Strumigenys micrans Fisher, 2000
| |
The type material was collected from rainforest leaf litter.
Identification
Fisher (2000) - A member of the lutron complex in the Strumigenys arnoldi-group. S. micrans is distinguished from other species in the arnoldi-group by the presence of a laterally projecting flagellate or looped pronotal humeral hair and antenna with 4 segments.
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. |
|
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. |
|
Biology
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- micrans. Strumigenys micrans Fisher, in Bolton, 2000: 635 (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 0.41, HW 0.35, CI 86, ML 0.18, MI 44, SL 0.25, SI 71, PW 0.21, AL 0.42. Characters of lutron-complex. Mandible blade narrow, linear, outcurved; no intercalary denticles present. Right mandible with a long spiniform proximal preapical tooth, at about the apical third of the length, and a short distal preapical tooth; left mandible with proximal but without distal preapical tooth. Preocular lamina broad, projecting below the antennal insertion. Anterior clypeal margin with broad spoon-shaped hairs directed dorsally. Dorsum of head behind clypeus reticulate-punctate and with numerous decumbent to suberect spatulate to spoon-shaped hairs on anterior two-thirds. Dorsum of head with a transverse row of 4 clavate hairs close to the occipital margin. Upper scrobe margin with a continuous row of clavate to spoon-shaped hairs. Hairs on upper scrobe margin not terminating at the posterior end with a more or less straight clavate hair. Eye very small, with 3 ommatidia in total and situated just above the ventral scrobe margin. Antenna with 4 segments. Leading edge of scape a dorsoventrally flattened convex lamella with a row of projecting spoon-shaped hairs. In profile, the promesonotum slightly convex; propodeal dorsum shallowly convex anteriorly, sloping slightly posteriorly before meeting the declivity in a blunt angle without a noticeable tooth; lamellae very narrow. Sides of alitrunk mostly smooth and shiny with weak longitudinal striolate sculpture on dorsal side or pronotum. Pronotal disc with longitudinal striolate and costulae sculpture. In between costulae, pronotum smooth or with fine punctulate sculpture; remainder of dorsal alitrunk and at least the upper half of the propodeal declivity reticulate-punctate. Pronotal humeral hair present, flagellate or looped. Mesonotum with 1 pair of erect hairs on anterior margin. Ground-pilosity of dorsal alitrunk consisting of a few scattered small suberect fine hairs. Dorsal surface of petiole node with faint reticulate-punctate sculpture that is almost effaced; the postpetiole glassy smooth. Petiole, postpetiole and gaster with clavate to remiform hairs. In profile the petiole with a well developed spongiform lamella. Postpetiole with well developed lateral and ventral spongiform lobes. Base of first gastral tergite with costulae radiating on each side of a broad central clear area, remainder of gaster smooth and shiny where clean. Color dull yellow to pale brown.
Type Material
Holotype worker, Madagascar: Provo Toamasina, P. N. Mantadia 895 m. 18°47.5'S, 48°25.6'E, 25-28.xi.1998 sifted litter (leaf mold, rotten wood), rainforest #111 (20)-1 (H. J. Ratsirarson) (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 635, 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.