Myrmecina sulawesiana

The species inhabits litter.

Identification
Okido, Ogata, and Hosoishi (2020) - Similar to Myrmecina asiatica (see its identification section for details) but distinguished by the medium-sized, oval eye of 15 or more ommatidia.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Indonesia.

Nomenclature

 * . Myrmecina sulawesiana Okido, Ogata & Hosoishsi, 2020: 93, fig. 43 (w.) INDONESIA.

Worker
Holotype worker. TL 2.59, HL 0.61, HW 0.61, CI 100, SL 0.51, SI 84, PW 0.43, ML 0.67. Paratype workers. TL 2.48-2.61, HL 0.61-0.62, HW 0.59-0.61, CI 96-97, SL 0.50-0.53, SI 84-88, PW 0.40-0.42, ML 0.61-0.69 (3 measured).

Head subrectangular, as long as or slightly longer than broad in full-face view; median portion of occipital margin flattened; occipital corners rounded, not projected posteriorly. Masticatory margin of mandible bent at midlength (third small tooth or sixth tooth); apical tooth strong, third tooth robust, followed by 5 small teeth and a blunt basal tooth. Dorsal surface of clypeus not concave; median portion of anterior margin slightly projected with an unclear median process; lateral portion simple, lacking sharp ridge in front of antennal insertions. Anterior dorsal surface of labrum with paired small denticles, close to each other. Frontal carinae virtually absent, indistinguishable from rugae on dorsum of head. Eyes large and moderately convex with maximum diameter 0.10 mm, with 6 ommatidia; malar space twice as long as diameter of eye in profile; distance between occipital margin and posterior margin of eye three times as long as diameter of eye. Antennal scape short, just reaching posterolateral corner of head; antennal flange weakly developed.

Dorsal outline of mesosoma convex in profile. Pronotum without denticles on dorsolateral portion; anterior portion marginate; anterior ventrolateral portion angulate bluntly. Furrow between pronotum and mesoepisternal projection broad. Eumetanotal spine present but small. Propodeal spine triangular, longer than broad at base, just reaching or feebly extending over vertical posteriormost limit of propodeum in profile. Propodeal lobe low. Propodeal spiracle large, situated near posterior portion of propodeum, distance between posterior margin of spiracle and posterior margin of propodeum shorter than diameter of spiracle. Petiole short, slightly longer than high in profile, slightly longer than broad in dorsal view; dorsal crest located at midlength in profile; subpetiolar process present but much reduced, bearing acute anterior apex. Postpetiole broader than petiole in dorsal view; lateral margin straight; dorsal outline flattened in profile; ventral outline slightly projected with acute anterior apex.

Anterior margin of gaster not concave in dorsal view; first gastral sternum simple without median longitudinal ridge.

Head with wavy rugae which are thin and longitudinal; ventrolateral portion smooth and shining. Clypeus smooth and shining. Mesosoma with weakly waved rugae longitudinally. Forecoxa smooth and shining. Petiole and postpetiole with longitudinal rugae. First gastral segment smooth and shining. Head with dense and short pilosity on dorsum. Mesosoma with dense and short pilosity on dorsum, hairs of pronotum as long as propodeal spine. Petiole and postpetiole without hairs on ventral surface. Body black to reddish brown, mandibles, antennae and legs yellowish brown.

Type Material
Holotype worker, INDONESIA: Bantimurung, 40 m alt., S. Sulawesi, S 05°01´xE 119°41´, 8. x. 2000, TUS 15 min. #3 (K. Ogata & K. Masaoka). Paratypes. 4 workers with same data as holotype (KUEC, ).