Strumigenys stenorhina

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

Strumigenys stenorhina casent0900840 p 1 high.jpg

Strumigenys stenorhina casent0900840 d 1 high.jpg

Specimen Labels

Common Name
Language: Japanese

Nests under stones or decayed wood. Polygynous. (Japanese Ant Image Database)

At a Glance • Polygynous  


Bolton (2000) – A member of the feae complex in the Strumigenys mayri-group. See Strumigenys exilirhina.

The species is similar to Strumigenys exilirhina, but distinguished by its long, straight mandibles (Japanese Ant Image Database).

Keys including this Species


Distribution based on Regional Taxon Lists

Palaearctic Region: Japan (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.


Life History Traits

  • Queen number: polygynous



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

  • stenorhina. Strumigenys stenorhina Bolton, 2000: 893 (w.q.) JAPAN.

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



Holotype. TL 2.7, HL 0.77, HW 0.50, CI 65, ML 0.36, MI 47, SL 0.49, SI 98, PW 0.29, AL 0.75. Characters of the feae-complex. Preapical tooth triangular and slightly recurved, shorter than width of mandible at point where tooth arises. Outer margin of mandible in full-face view straight from close to base to level of preapical tooth; inner margin between same points straight or slightly convex. Upper scrobe margin with two freely laterally projecting flagellate hairs, one at level of eye and the other apicoscrobal. In full-face view the upper scrobe margins, from just in front of the level of the eyes to the scobe apex, evenly divergent posteriorly and only extremely feebly convex. Cephalic dorsum with 4-6 erect subflagellate or looped hairs along the occipital margin, a similar but shorter pair near level of highest point of vertex. Preocular notch absent but ventrolateral margin of head narrowed and somewhat constricted immediately in front of eye where it is shallowly and broadly concave. Maximum diameter of eye greater than the maximum width of the scape; eye with 4-5 ommatidia in the longest row. Pronotal humeral hair flagellate; pronotal dorsum finely reticulate to reticulate-punctate, may be somewhat effaced medially and have some extremely feeble longitudinal rugulae. Pronotal dorsum without erect hairs; mesonotum with 2 pairs of erect flagellate hairs. Dorsal surfaces of waist segments and first gastral tergite with flagellate hairs. Pleurae and side of propodeum smooth. One or two long fine erect flagellate hairs present on the dorsal (outer) surface of the hind basitarsus and another 1-2 on the hind tibia; similar pilosity present on the other legs. Petiole in profile with anterior face of node distinctly shorter than length of dorsum. Disc of postpetiole smooth.

Paratypes. TL 2.6-2.7, HL 0.73-0.78, HW 0.47-0.50, CI 63-66, ML 0.32-0.36, MI 45-48, SL 0.47-0.50, SI 98-102, PW 0.27-0.30, AL 0.72-0.78 (10 measured).

The single non-paratypic worker from China is slightly larger than the Japanese samples: HL 0.81, HW 0.52, CI 64, ML 0.40, MI 49, SL 0.54, SI 104, PW 0.30, AL 0.80.

Type Material

Holotype worker, Japan: Okinawa Pref., Ishigaki I., Yonehara, Yashiri n-tenboudai, 17.iii.1975 (K. Onoyama) (Oklahoma Museum of Natural History, University of Oklahoma). Paratypes. 9 workers with same data as holotype [ series originally Vial #3 (KO colony #750317-6)]; numerous workers and queens in alcohol with same data as holotype but Vial #1 (KO colony #750317-13); several workers in alcohol with same data as holotype but 16.iii.1975, Vial #2 (KO colony #750316-3) (OMNH, The Natural History Museum, in Onoyama collection).


References based on Global Ant Biodiversity Informatics

  • Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
  • Terayama M., S. Kubota, and K. Eguchi. 2014. Encyclopedia of Japanese ants. Asakura Shoten: Tokyo, 278 pp.