Myrmecina padangensis

Nothing is known about the biology of .

Identification
Okido, Ogata, and Hosoishi (2020) - Distinguished by a posteriorly broad head, simple anterior margin of a smooth and shining first gastral tergum, short antennal scape just reaching occipital corner, long petiole, and large eyes.

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

Nomenclature

 * . Myrmecina padangensis Okido, Ogata & Hosoishsi, 2020: 80, fig. 37 (w.) INDONESIA.

Worker
Holotype worker. TL 3.56, HL 0.88, HW 0.88, CI 100, SL 0.68, SI 77, PW 0.58, ML 0.93. Paratype worker. TL 3.49, HL 0.86, HW 0.90, CI 104, SL 0.72, SI 80, PW 0.58, ML 0.94 (1 measured).

Head subrectangular, as long as or shorter than broad, broad posteriorly in full-face view; median portion of occipital margin concave; occipital corners widely rounded, not projected posteriorly; dorsal outline convex in profile. 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 or without a median process; lateral portion simple, lacking sharp ridge in front of antennal insertions. Anterior dorsal surface of labrum with paired large denticles, close to each other. Frontal carinae virtually absent, indistinguishable from rugae on dorsum of head. Eyes large and convex with maximum diameter 0.14 mm, with 8 ommatidia; malar space twice as long as diameter of eye or shorter in profile; distance between occipital margin and posterior margin of eye four times twice as long as diameter of eye or shorter. Antennal scape short, just reaching posterolateral corner of head; antennal flange fully developed.

Dorsal outline of mesosoma strongly convex in profile. Pronotum without denticles; anterior portion marginate; anterior ventrolateral portion projected or angulate; anterior dorsolateral portion rounded, not angulate. Furrow between pronotum and mesoepisternal projection variable, narrow to broad. Eumetanotal spine present but small. Propodeal spine triangular, longer than broad at base, slightly extending over vertical posteriormost limit of propodeum in profile. Propodeal lobe usually low, sometimes raised. Propodeal spiracle large, situated near base of propodeal spine, distance between posterior margin of spiracle and posterior margin of propodeum longer than diameter of spiracle. Petiole long, longer than high in profile, longer than broad in dorsal view; dorsal crest absent; subpetiolar process present, but unclearly without acute anterior apex. Postpetiole slightly broader than petiole in dorsal view; anterolateral portion raised; dorsal outline flattened or convex in profile; ventral outline slightly projected with two tops.

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

Head with straight rugae which are thin; ventrolateral portion with longitudinal rugae. Clypeus smooth and shining. Mesosoma with wavy rugae which are thick. Forecoxa smooth and shining. Petiole and postpetiole with longitudinal rugae. First gastral segment smooth and shining. Head with relatively sparse and long pilosity on dorsum. Mesosoma with sparse and long pilosity on dorsum, hairs of pronotum as long as propodeal spine. Petiole without hairs on ventral surface. Postpetiole with 2-4 hairs on ventral surface. Body black to dark reddish brown, forecoxae reddish brown, mandibles, antennae and legs yellowish brown.

Type Material
Holotype worker, INDONESIA: Sumatra, Padang (no collector’s name). Paratypes. 2 workers with same data as holotype (BMNH).