Strumigenys hiroshimensis

A rare species found of the forest floor of broadleaf forests and nesting in the soil (Ogata & Onoyama 1998).

Identification
A member of the Strumigenys circothrix-group.

Bolton (2000) - S. hiroshimensis: there is a single spoon-shaped hair on the leading edge of the scape (distal of the subbasal angle) that is curved toward the base of the scape; dorsum of the petiole node is without apically thickened to spatulate standing hairs; hairs on the first gastral tergite are simple; fully closed mandibles are as long as maximum length of clypeus; in dorsal view maximum width of lateral spongiform tissue on one side of postpetiole disc is broader than the dorsal width of the hind femur.

Strumigenys circothrix: has all hairs on the scape distal of the subbasal angle curved toward the apex of the scape; dorsum of the petiole node has 2 pairs of apically thickened to spatulate standing hairs; hairs on the first gastral tergite are apically thickened to clavate; fully closed mandibles are slightly shorter than maximum length of clypeus; in dorsal view maximum width of lateral spongiform tissue on one side of postpetiole disc is narrower than the dorsal width of the hind femur.

Distribution based on Regional Taxon Lists
Oriental Region: Taiwan. Palaearctic Region: Japan.

Nomenclature

 *  hiroshimensis. Smithistruma hiroshimensis Ogata & Onoyama, 1998: 281, figs. 5, 6 (w.) JAPAN. Combination in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 121. See also: Bolton, 2000: 411.

Worker
Bolton (2000) - TL 2.0, HL 0.55, HW 0.41, CI 75, ML 0.13, MI 24, SL 0.28, SI 68, PW 0.25, AL 0.54. Extremely closely related to circothrix but differing as follows.

Type Material
Bolton (2000) - Holotype worker, JAPAN: Mt Futabayama, Hiroshima City, Hiroshima Pref., Honshu, 2.viii.1996 (Y. Touyama) [examined].