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Strumigenys symmetrix
| Strumigenys symmetrix | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. symmetrix |
| Binomial name | |
| Strumigenys symmetrix (Bolton, 2000)
| |
A forest species that has been found in litter-samples.
Identification
A member of the Strumigenys rostrata-group.
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 symmetrix. Worker. Specimen code casent0005992. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by MCZ, Cambridge, MA, USA. |
   
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| Worker. Specimen code casent0102265. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by NHMUK, London, UK. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- symmetrix. Pyramica symmetrix Bolton, 2000: 356 (w.) MADAGASCAR. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 128
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 0.09, MI 18, SL 0.24, SI 63, PW 0.22, AL 0.52. Closely related to Strumigenys fautrix and mostly matching the description of that species, but differing as follows.
S. symmetrix: Spoon-shaped hairs on vertex clear, almost translucent, producing coloured reflections with correct angle of illumination. Lamella on propodeal declivity engages basal half or slightly less of tooth; margin of lamella narrowly convex at its midheight. Ventral spongiform curtain of petiole continuous from base to apex of segment.
S. fautrix: Spoon- shaped hairs on vertex dull, subopaque, not producing coloured reflections. Lamella on propodeal declivity engages tooth for most of its length, only tip of tooth free; margin of lamella broadly convex at its midheight. Ventral spongiform curtain of petiole absent beneath peduncle, present below node.
Type Material
Holotype worker, Madagascar: Pref. Tsiroanomandidy, Bongolava, 6-11.xii.1974, forest humus and litter (A. Peyrieras) (Museum of Comparative Zoology).
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 356, 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.