Strumigenys symmetrix

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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)

Pyramica symmetrix casent0005891 profile 1.jpg

Pyramica symmetrix casent0005891 dorsal 1.jpg

Specimen labels

A forest species that has been found in litter-samples.


A member of the Strumigenys rostrata-group.

Keys including this Species


Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb





The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • 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.



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).


  • 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)