Myrmecina longiseta

Nothing is known about the biology of .

Identification
Okido, Ogata, and Hosoishi (2020) - Similar to Myrmecina boltoni, Myrmecina monticola and Myrmecina parallela (see M. boltoni for the shared characters). Among these species, M. longiseta can be distinguished by extremely long, sparse pronotal-pilosity and a short propodeal spine.

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

Nomenclature

 * . Myrmecina longiseta Okido, Ogata & Hosoishsi, 2020: 63, fig. 28 (w.) INDONESIA.

Worker
Holotype. TL 3.37, HL 0.80, HW 0.76, CI 95, SL 0.72, SI 95, PW 0.56, ML 0.93.

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 (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; lateral portion simple, lacking sharp ridge in front of antennal insertions. Anterior dorsal surface of labrum with paired small denticles distinctly, close to each other. Frontal carinae virtually absent, indistinguishable from rugae on dorsum of head. Eyes slightly large and distinctly convex with maximum diameter 0.11 mm, with 7 ommatidia; malar space twice as long as diameter of eye in profile; distance between occipital margin and posterior margin of eye four times as long as diameter of eye or longer. Antennal scape long, slightly extending beyond posterolateral corner of head; antennal flange fully developed.

Dorsal outline of mesosoma convex in profile. Pronotum with unclear denticles on dorsolateral portion; anterior portion marginate; anterior ventrolateral portion angulate. Furrow between pronotum and mesoepisternal projection broad. Eumetanotal spine present but small. Propodeal spine triangular, longer than broad at base, not reaching vertical posteriormost limit of propodeum in profile. Propodeal lobe low. Propodeal spiracle small, situated near base of propodeal spine, apart from margin by its diameter. Petiole long, longer than high in profile, and slightly longer than broad in dorsal view; dorsal crest located at midlength in profile; subpetiolar process and median longitudinal ridge at ventral portion absent. Postpetiole as broad as petiole in dorsal view; dorsal outline flattened or slightly convex in profile; ventral outline not projected.

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

Head with straight rugae which are thin distinctly; ventrolateral portion with longitudinal rugae anteriorly, and smooth and shining posteriorly. Clypeus smooth and shining. Mesosoma with some transverse rugae anteriorly, and longitudinal rugae posteriorly. Forecoxa smooth and shining. Petiole and postpetiole with longitudinal rugae. First gastral segment smooth and shining. Head with sparse and long pilosity on dorsum. Mesosoma with sparse and extremely long pilosity on dorsum, hairs of pronotum twice as long as propodeal spine or longer. Petiole without hairs on ventral surface. Postpetiole with 2 hairs on ventral surface. Head, mesosoma, forecoxae, petiole and postpetiole black, gaster dark reddish brown, mandibles, antennae and legs yellowish brown.

Type Material
Holotype worker, INDONESIA: Sumatra, Padang (no collector’s name).