Myrmecina muluensis

Nothing is known about the biology of .

Identification
Okido, Ogata, and Hosoishi (2020) - Similar to Myrmecina sulcata in the smooth and shining ventrolateral portion of the head, the petiole with subpetiolar process or median longitudinal ridge, mesosoma with the eumetanotal spine, and the relative length of the antennal scape.  Myrmecina muluensis is distinguished from M. sulcate by a small eye comprising 15 or less ommatidia and a long head.

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

Nomenclature

 * . Myrmecina muluensis Okido, Ogata & Hosoishsi, 2020: 74, fig. 34 (w.) MALAYSIA.

Worker
Holotype. TL 3.56, HL 0.85, HW 0.80, CI 94, SL 0.72, SI 90, PW 0.50, ML 0.99. Paratype. TL 3.43, HL 0.84, HW 0.75, CI 90, SL 0.72, SI 96, PW 0.50, ML 0.93 (1 measured).

Head subrectangular, slightly longer than broad in full-face view; median portion of occipital margin much concave; 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 a median process or three processes; lateral portion simple, lacking sharp ridge in front of antennal insertions. Anterior dorsal surface of labrum with paired denticles, which are well separated. Frontal carinae virtually absent, indistinguishable from rugae on dorsum of head. Eyes small circularly and moderately convex, varying in size with maximum diameter 0.09 mm and 12-13 ommatidia; malar space distinctly twice as long as diameter of eye or longer in profile; distance between occipital margin and posterior margin of eye five times as long as diameter of eye or longer. Antennal scape long, extending beyond posterolateral corner of head; antennal flange fully developed.

Dorsal outline of mesosoma convex in profile. Pronotum without denticles on dorsolateral portion; anterior portion not marginate; anterior ventrolateral portion not angulate. Furrow between pronotum and mesoepisternal projection broad. Eumetanotal spine distinctly present. Propodeal spine elongate, much longer than broad at base, not reaching or just reaching vertical posteriormost limit of propodeum in profile. Propodeal lobe low. Propodeal spiracle large, situated near base of propodeal spine, distance between posterior margin of spiracle and posterior margin of propodeum longer than diameter of the spiracle. Petiole long, longer than high in profile, and much longer than broad in dorsal view; dorsal crest located at midlength in profile; subpetiolar process variously developed from weakly raised median longitudinal ridge to distinct projection. Postpetiole slightly broader than petiole in dorsal view; anterolateral margin rounded; anterior portion raised in profile; ventral outline not projected.

Anterior margin of gaster not concave in dorsal view.

Head with thin rugae longitudinally; ventrolateral portion smooth and shining. Clypeus smooth and shining. Mesosoma with straight rugae which are thick. Forecoxa smooth and shining. Petiole and postpetiole with longitudinal rugae. First gastral segment smooth and shining. Head with dense and long pilosity on dorsum. Mesosoma with dense 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. Head, mesosoma, petiole, postpetiole reddish brown or yellowish brown but variable, mandibles, antennae and legs yellowish brown.

Type Material
Holotype worker, MALAYSIA: Sarawak, 4th Division, Gn. Mulu NP., 20. iii. 78 (N. M. Collins). Paratypes. 2 workers with same data as holotype (BMNH).