Eurhopalothrix coronata

The type specimens were collected from Berlese funnel and Winkler bag extractions of rainforest leaf mould.

Identification
Key to Old World Basicerotini

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.