Myrmecina macrops

The species inhabits soil and litter. It has been collected from a pitfall trap.

Identification
Okido, Ogata, and Hosoishi (2020) - A member of the Myrmecina macrops complex (Myrmecina breviata, Myrmecina gymnocephala, M. macrops, and Myrmecina inflata). This species is different from others in the complex by its developed propodeal spine, and the pronotum and mesonotum with wavy rugae.

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

Nomenclature

 * . Myrmecina macrops Okido, Ogata & Hosoishsi, 2020: 64, fig. 29 (w.q.) MALAYSIA.

Worker
Holotype. TL 2.80, HL 0.66, HW 0.69, CI 105, SL 0.56, SI 81, PW 0.48, ML 0.75. Paratype. TL 2.57-2.77, HL 0.62-0.67, HW 0.65-0.70, CI 104-105, SL 0.53-0.59, SI 81-86, PW 0.45-0.50, ML 0.69-0.73 (5 measured).

Head subrectangular, as long as broad in full-face view; median portion of occipital margin flattened or slightly concave; occipital corners widely rounded, not projected posteriorly in profile. Masticatory margin of mandible bent at midlength (third small tooth or sixth tooth); apical tooth strong, third tooth robust, followed by about 4 small teeth and a stout basal tooth bearing blunt apex; small teeth unclear. Dorsal surface of clypeus slightly concave; median portion of anterior margin weakly projected with a median process; the process frequently unclear; lateral portion simple, lacking sharp ridge in front of antennal insertions. Anterior dorsal surface of labrum with paired small denticles distinctly, very closed to each other without fusion. Frontal carinae present, running back to about mid point level of eyes but very unclearly. Eyes extremely large and moderately convex, varying in size with maximum diameter 0.18 mm and 8-9 ommatidia; malar space as long as diameter of eye in profile. Antennal scape long, extending beyond posterolateral corner of head; antennal flange weakly developed.

Dorsal outline of mesosoma convex in profile. Pronotum without denticles; anterior ventrolateral portion angulate. Eumetanotal spine present but small, frequently unclear. Propodeal spine triangular, just reaching vertical posteriormost limit of propodeum in profile. Propodeal lobe low. Propodeal spiracle small, situated near base of propodeal spine, distance between posterior margin of spiracle and posterior margin of propodeum much longer than diameter of spiracle. Petiole short, as long as high in profile, and slightly longer than broad in dorsal view; small but distinct dorsal crest located almost at midlength in profile; subpetiolar process projecting forward with acute apex. Postpetiole slightly broader than petiole in dorsal view; lateral margin straight; dorsal outline slightly convex or flattened in profile; ventral outline projected rectangularly, frequently undeveloped.

Anterior margin of gaster not concave in dorsal view.

Head distinct foveolate, but variable from opaque to foveolate on the whole surface; ventrolateral portion smooth and shining. Mandibles smooth and shining sometimes with yellow spots on dorsal surface. Clypeus smooth and shining. Mesosoma with wavy rugae distinctly. Petiole and postpetiole with wavy longitudinal rugae. Head with more or less dense pilosity on dorsum. Mesosoma with more or less dense pilosity on dorsum. Pilosity of pronotum slightly shorter than propodeal spine, but variable in length, sometimes longer than propodeal spine. Pilosity of petiole and postpetiole longer than that of mesosoma. Petiole with or without hairs on ventral surface. Postpetiole with about 4 hairs on ventral surface. Body dark reddish brown.

Type Material
Holotype worker, MALAYSIA: Sepilok Forest, Sabah, Borneo, 4. vii. 1998 (K. Eguchi). Paratypes. 9 workers and 1 queen (dealate) with same data as holotype.

Determination Clarifications
This species corresponds to “Myrmecina sp. M” of Ito et al. (2001).