Carebara hannya

Nothing is known about the biology of .

Distribution based on Regional Taxon Lists
Palaearctic Region: Japan.

Nomenclature

 * . Oligomyrmex hannya Terayama, 1996: 21, figs. 44-47 (s.w.) JAPAN.
 * Combination in Carebara: new combination (unpublished).
 * Status as species: Imai, et al. 2003: 131.

Worker
Holotype. Major. HL 0.50 mm; HW 0.40 mm; SL 0.23 mm; CI 80; SI 58; WL 0.43 mm; PL 0.18 mm; PH 0.13 mm; DPW 0.08 mm; TL 1.3 mm.

Head 1.3 x as long as wide, with parallel sides and weakly convex posterior margin in frontal view; vertex with a pair of small tubercles. Mandibles with 5 teeth. Antennae with 9 segments; scape short, 0.5 x head length; 2nd segment longer than wide; 3rd to 7th segments each wider than long; 8th segment slightly longer than wide; 9th segment 2.8 x as long as wide. Eyes small, each consisting of 2 facets only. Ocelli absent.

Alitrunk as in Fig.; dorsum of promesonotum broadly convex in lateral view; metanotal groove deeply incised dorsally; mesopleura without transverse groove; anterior half of propodeal dorsum strongly convex and posterior half almost straight. Posterior margins of propodeum with a thin lamella; posterodorsal comers of propodeum angulated, not forming a spine.

Petiole longer than high, with convex dorsal margin; subpetiolar process forming an acute anteroventral tooth. Postpetiole slightly higher than long, with convex dorsal margin in lateral view.

Head very weakly microreticulate; genae with many longitudinal striae; promesonotum smooth and shining; mesopleura and propodeum microreticulate; waist weakly microreticulate; gaster smooth.

Body yellowish brown.

Paratype minors. HL 0.31-0.33 mm; HW 0.28-0.29 mm; SL 0.23 mm; CI 88-90; SI 78-82; WL 0.42-0.43 mm; PL 0.11 mm; PH 0.09 mm; DPW 0.06 mm; TL 0.9-1.0 mm (n = 5).

Head square, with subparallel sides and weakly concave posterior margin in frontal view. Mandibles with 5 teeth. Eyes small, consisting of a single facet only. Antennae with 9 segments; 3rd to 7th segments each wider than long; 8th segment as long as wide; apical segment 2.4x as long as wide.

Promesonotal dorsum broadly convex in lateral view; metanotal groove strongly incised dorsally; propodeal dorsum weakly convex; posterior margins of propodeum with a thin lamella; its dorsalmost part obscurely angulated. Petiole longer than high, with convex dorsal margin in lateral view; subpetiolar process fornting an acute anteroventral tooth. Postpetiole longer than high, with broadly convex dorsal margin in lateral view.

Head smooth with shallow punctures sparsely; pronotum smooth and shining; mesopleura and propodeum microreticulate; waist microreticulate excepting disc of postpetiole smooth; gaster smooth and subopaque.

Body yellowish brown.

Type Material
Holotype. Major worker, Syuri, Okinawa-jima, Okinawa Pref., 6.X.1988, M. Terayama leg. Paratypes. 2 major workers, 5 minor workers, same data as holotype; 2 major workers, 5 minor workers, Chibana, Okinawa-jima, Okinawa Pref., 19.V.1983, T. Mizukami leg.; major worker, 2 minor workers, Chinen, Okinawa-jima, Okinawa Pref., 26.VIII.1975, T. Abe leg.

Etymology
The specific name is the Japanese noun hannya, which is the name of a Japanese deity who has a pair of horns on head.

References based on Global Ant Biodiversity Informatics

 * Terayama M. 1996. Taxonomic studies on the Japanese Formicidae, part 2. Seven genera of Ponerinae, Cerapachyinae and Myrmicinae. Nature & Human Activities 1: 9-32.
 * Terayama M., S. Kubota, and K. Eguchi. 2014. Encyclopedia of Japanese ants. Asakura Shoten: Tokyo, 278 pp.
 * Yamane S., S. Ikudome, and M. Terayama. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp, 138-317.
 * Yamane S.; Ikudome, S.; Terayama, M. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp138-317.