Eurhopalothrix coronata

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

Nomenclature

 *  coronata. Eurhopalothrix coronata Taylor, 1990b: 407, figs. 8-12, 46 (w.) BORNEO.

Worker
General features as illustrated. All Class A attributes present, with those of Class B, unless otherwise indicated. Dimensions (holotype, mm): HL 0.51; HW 0.50; CI 102; ML 0.09; MI 21; SL 0.30; SI 60; PW 0.25; WL 0.50. Both the paratypes have HW 0.52 mm. Outer mandibular borders more-or-less continuously (feebly) convex in frontal view. Face of clypeus between frontal lobes divided by a relatively very distinct, obtuse, transversely arched ridge. Eyes small but distinct, 4- or 5-faceted. Occipital border broadly but shallowly emarginate, the outline an even arc. Mesosomal profile not a continuous curve, its outline shallowly depressed at the promesonotal/propodeal junction; mesometanotal suture, however, represented only as a narrow depression without an incised groove severing the underlying sculpture. Petiolar node in dorsal view distinctly wider than long.

Specialised enlarged hairs well differentiated from those of ground pilosity; each globose, expanded at about half its height, with a relatively thick basal stem. Distributed (when complement is complete) as follows: 16 on frons, in 3 transverse rows. The middle and posterior rows each with 4 hairs, the anterior with 8; 2 pairs on promesonotum (lateral and posterolateral), and a single posterolateral pair each on the petiolar node and postpetiole. About 18 such hairs on dorsum of first gastral tergite, arranged roughly in 4 longitudinal rows of 4, 5, 5 and 4. The accompanying scattered hairs of the ground pilosity relatively large, about t to ! the height of the specialised major hairs, and generally of similar structure, but relatively a little less inflated; ground pilosity elsewhere well developed, as illustrated.

Type Material
Type Locality: Malaysia: Sabah: Quoin Hill Research Station, near Tawau (04°16'N.,117°54'E.). Malaysia: Sarawak: First Division: Kampong Segu, near Kuching, 1 paratype worker {RWT ace 68.249, 4.iv.1968); Sabah: Quoin Hill Research Station, (type locality), 750 ft, holotype worker (RWT ace 68.614, 16-69 vi.J968); Indonesia: Sumatra: Liwa (05°04'S.,104°03'E.), 1 paratype worker (M. S. Harvey, 5.ix.1984). All specimens from Berlese funnel or Winkler bag extractions of rainforest leaf mould. All types in (type No. 7777). The holotype gold-palladium coated for SEM study.