Myrmecina poringensis

Nothing is known about the biology of .

Identification
Okido, Ogata, and Hosoishi (2020) - Similar to Myrmecina dechai (see its identification section for details) but distinguished by having an extremely short, upward pointing, propodeal spine.

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

Nomenclature

 * . Myrmecina poringensis Okido, Ogata & Hosoishsi, 2020: 84, fig. 39 (w.) MALAYSIA.

Worker
Holotype worker. TL 2.45, HL 0.58, HW 0.54, CI 93, SL 0.46, SI 87, PW 0.69, ML 0.61. Paratype worker. TL 2.34, HL 0.54, HW 0.53, CI 97, SL 0.45, SI 85, PW 0.38, ML 0.59 (1 measured).

Head subrectangular, longer than broad in full-face view; median portion of occipital margin concave; occipital corners rounded, not projected posteriorly. Masticatory margin of mandible bent at midlength (second small tooth or fifth tooth); apical tooth strong, third tooth robust, followed by 4 small teeth, without a basal tooth. Dorsal surface of clypeus not concave; median portion of anterior margin slightly projected with a 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 slightly large and moderately convex, varying in size with maximum diameter 0.09-0.10 mm and 5-6 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 slightly convex in profile. Pronotum without denticles on dorsolateral portion; anterior portion marginate; anterior dorsolateral portion angulate; anterior ventrolateral portion not angulate. Furrow between pronotum and mesoepisternal projection broad. Eumetanotal spine absent. Propodeal spine triangular, shorter than broad at base, clearly not reaching vertical posteriormost limit of propodeum in profile. Propodeal lobe low. Propodeal spiracle large, situated near posterior margin of propodeum, apart from margin by its diameter. Petiole short, slightly longer than high in profile, longer than broad in dorsal view; dorsal crest located posteriorly in profile; subpetiolar process present with acute anterior apex. Postpetiole much broader than petiole in dorsal view; anterior portion slightly raised in profile; ventral outline slightly projected rectangularly 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 smooth and shining. Clypeus smooth and shining. Mesosoma with transverse rugae on anterior portion, and longitudinal rugae on posterior portion in dorsal view. Forecoxa smooth and shining. Petiole and postpetiole with a few rugae. First gastral segment smooth and shining. Head with relatively sparse and short pilosity on dorsum. Mesosoma with sparse and long pilosity on dorsum, hairs of pronotum much longer than propodeal spine. Petiole without hairs on ventral surface. Postpetiole with 2 hairs on ventral surface. Head and mesosoma black or dark reddish brown, petiole, postpetiole and gaster reddish brown, mandibles, antennae and legs yellowish brown.

Type Material
Holotype worker, MALAYSIA: Sabah, Poring Hot Springs, 7. v. 87, 500 m (Burckhardt & Löbl). Paratypes. 1 worker with same data as holotype; 2 workers with same data as holotype but 10. v. 87, 600 m (BMNH).