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Strumigenys fautrix
| Strumigenys fautrix | |
|---|---|
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. fautrix |
| Binomial name | |
| Strumigenys fautrix (Bolton, 2000)
| |
Occurs in a range of forest habitats. With the exception of a single collection from a rotten log, specimens have been sampled from litter.
Identification
Bolton (2000) – A member of the Strumigenys rostrata-group. Strumigenys ambatrix is easily separated from fautrix as the former has the pronotal humeral hair long and flagellate. Characters that differentiate the other three Malagasy species known in the fautrix-group are given under Strumigenys symmetrix and Strumigenys victrix.
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
Worker
Images from AntWeb
   
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| Holotype of Pyramica fautrix. Worker. Specimen code casent0102258. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by NHMUK, London, UK. |
   
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| Worker. Specimen code casent0006028. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by MCZ, Cambridge, MA, USA. |
  
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| Worker. Specimen code casent0005991. 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.
- fautrix. Pyramica fautrix Bolton, 2000: 355 (w.) MADAGASCAR. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 120
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 1.9, HL 0.50, HW 0.38, CI 76, ML 0.08, MI 16, SL 0.24, SI 63, PW 0.24, AL 0.50. Dorsum of clypeus covered with small, anteriorly directed appressed squamate hairs that are much smaller than the spoon-shaped hairs that fringe the clypeal margins, and smaller than those on the vertex. Spoon-shaped hairs on the vertex broad, subopaque and conspicuous; those that fringe the dorsolateral margins of the head are anteriorly curved and form a neat row; they are as large as those on the vertex and the leading edge of the scape. In profile the vertex only with spoon-shaped hairs to its highest point, but close to the occipital margin with a transverse row of 4 erect simple hairs that contrast strongly with the preceding pilosity. Eye minute, of only 1 or 2 ommatidia. Humeral hair simple, stout and straight. Promesonotal dorsum with sparse small spatulate ground-pilosity, the mesonotum also with 3 pairs of erect simple hairs, the posteriormost pair of which is distinctly the shortest. Dorsal surfaces of petiole, postpetiole and first gastral tergite with numerous simple standing hairs. Dorsum of head finely reticulate-punctate. In dorsal view pronotum with faint shagreenate ground-sculpture and sparse, extremely feeble longitudinal costulae. The costulae are located between a pair of stronger longitudinal carinae that are continuous with the dorsolateral margination of the mesonotum and propodeum; this pair of pronotal carinae situated well in from the lateral borders of the sclerite in dorsal view. Mesonotum and petiole dorsum weakly sculptured, propodeum and disc of postpetiole smooth. Margins of postpetiole disc in dorsal view completely surrounded with spongiform tissue. Anterior margin of postpetiole disc much broader than posterior margin, the sides approximately straight and markedly convergent posteriorly. Pleurae and sides of propodeum smooth except for some faint sculpture near dorsal margin. Lamella of propodeal declivity broad and convex n ear its midheight, engaging the propodeal tooth to very near its apex. Ventral spongiform curtain of petiole present beneath node but absent beneath peduncle. Lateral and ventral spongiform lobes of postpetiole large.
Type Material
Holotype worker, Madagascar: Berenty, Ambosary, 13.viii.1981, no. 2036 (J. M. Wilson) (The Natural History Museum).
References
- Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria”. 99:1-191.
- Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 354, worker described)
- Tang, K. L., Guénard, B. 2023. Further additions to the knowledge of Strumigenys (Formicidae: Myrmicinae) within South East Asia, with the descriptions of 20 new species. European Journal of Taxonomy 907, 1–144 (doi:10.5852/ejt.2023.907.2327).
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.