Strumigenys trixodens

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Strumigenys trixodens
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. trixodens
Binomial name
Strumigenys trixodens
Bolton, 2000

Strumigenys trixodens casent0900749 p 1 high.jpg

Strumigenys trixodens casent0900749 d 1 high.jpg

Specimen Labels

Known from the type collection of workers. Nothing is known about the biology of Strumigenys trixodens.


The only member of the Strumigenys trixodens-group.

Keys including this Species


Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • trixodens. Strumigenys trixodens Bolton, 2000: 909, figs. 480, 515 (w.) BORNEO.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



Holotype. TL 2.9, HL 0.77, HW 0.59, CI 77, ML 0.43, MI 56, SL 0.48, SI 81, PW 0.30, AL 0.76. Hairs on leading edge of scape coarsely spatulate, suberect to almost erect and curved; longest of them subequal to maximum width of scape. Ground pilosity of head of numerous slightly elevated curved spatulate hairs. Occipital margin with a transverse row of erect longer stouter hairs, but cephalic dorsum anterior to this row without standing hairs. Pronotal dorsum with slightly elevated ground-pilosity but without erect stout hairs. Mesonotum with 4 pairs of erect stoutly remiform hairs; the anterior two pairs longer than the posterior two and the second pair the longest. Long remiform hairs present on petiole and postpetiole, these contrasting strongly with the fine flagellate hairs of the first gastral tergite. Petiole node in dorsal view about as long as broad. Disc of postpetiole only slightly broader than petiole, not markedly transverse. Postpetiole disc mostly smooth, with punctate sculpture around the periphery (variable, see under paratypes). Longest basigastral costulae about equal to length of postpetiole disc.

Paratypes. TL 2.9-3.1, HL 0.77-0.82, HW 0.58-0.62, CI 73-77, ML 0.43-0.46, MI 53-56, SL 0.47-0.50, SI 80-83, PW 0.30-0.33, AL 0.75-0.80 (5 measured). As holotype but sculpture on disc of postpetiole increasing in area with increased body size. In the largest non-paratypic individuals the disc is almost entirely reticulate-punctate.

The non-paratypic material contains individuals that are slightly smaller to slightly larger than the type-series but are otherwise identical. Dimensions of non-paratypic workers. HL 0.76-0.92, HW 0.55-0.73, CI 72-77, ML 0.40-0.50, MI 53-54, SL 0.47-0.55, SI 77-85.

Type Material

Holotype worker, Malaysia: Sarawak, 4th Division, Gn. Mulu N.P., 830 m., v-viii. 1978, BM 1978-49 (P. M. Hammond & J. E. Marshall) (The Natural History Museum). Paratypes. 5 workers with same data as holotype (BMNH, Museum of Comparative Zoology).


  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 909, figs. 480, 515 worker described)

References based on Global Ant Biodiversity Informatics

  • Huong N. T. T., P. V. Sang, and B. T. Viet. 2015. A preliminary study on diversity of ants (Hymenoptera: Formicidae) at Hon Ba Nature Reserve. Environmental Scientific Conference 7: 614-620.
  • Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58