Hexarhopalus (Hexarhopalus) ferreri, Purchart, Luboš, 2010

Purchart, Luboš, 2010, Review of the genus Hexarhopalus Fairmaire, 1891 (Coleoptera, Tenebrionidae, Stenochiinae) from Borneo with description of new species, Zootaxa 2476, pp. 1-13 : 5

Hexarhopalus (Hexarhopalus) ferreri sp. nov.

( Fig. 3 )

Type locality. Borneo, Sarawak, Mt. Murud.

Type material. Holotype. (♂ BMNH): Borneo, Mt. Murud, 6-7.000 ft. [feet], Dr. E. Mjoberg // Brit. Mus., 1924 – 534.

Condition of holotype: all tarsi and five right apical antennomeres missing.

Differential diagnosis. Within the genus Hexarhopalus it only resembles H. rolandi sp. nov. from which it is easily distinguishable by the following characters: elytra slightly convex (LV), elytral interstriae very slightly convex and almost straight, elytral striae indicated by regular deep punctures, elytral declivity moderately steep (in H. rolandi sp. nov. elytra strongly convex (LV), elytral interstriae raised and distinctly corrugate, elytral striae indicated by irregular row of punctures, elytral declivity steep).

Description. Size of holotype 10.5 x 4.6. Brown, dull-shiny, with labrum, maxillary palpi and tibiae pale brown. Body elongate oval, glabrous.

Head smooth, glabrous, shagreened and therefore dull. Only clypeus sparsely, finely and simply punctate. Head narrower than pronotum in ratio 1:1.45. Frontoclypeal sulcus on the base U-shaped, deep, not reaching the clypeal margin. Distance between eyes 1.3 times as wide as their diameter (DV). Ocular sulcus normally developed, deep. Antenna slender, 1.4 times as long as pronotum.

Pronotum glabrous, shagreened, as long as broad, broadest at middle, narrowed towards posterior angles. Base of pronotum rimmed and obliquely truncate anteriad to posterior angles. Anterior two thirds of pronotum with two large swellings situated dorso-laterally. The space between the swellings depressed midlongitudinally. Oblique indentation in posterior angles deep and short. Lateral carina developed only in anterior angles of pronotum and indicated with short and relatively deep indentation in posterior angles.

Elytra shagreened, elongate-oval, broadest behind middle, 1.45 times as long as its width and 2.1 times longer and 1.4 times as wide as pronotum. The base of elytra V-shaped emarginate and strongly carinate with transverse costa. Elytral suture flat. Elytral striae indicated by regular row of relatively large, longitudinal and deep punctures. Elytral interstriae very slightly convex, transversely connected between strial punctures creating an impression of a net-like surface of the elytra. Elytral disc slightly convex (LV). Elytral declivity moderately steep. Scutellum triangular.

Prosternum, prosternal process, mesoventrite and metaventrite glabrous, smooth and shiny. Metaventrite approximately 0.9 of length of mesocoxa. Abdominal ventrites smooth and micropubescent.

Legs smooth, micropubescent, finely and simply punctate. Apical half of tibiae with relatively long yellowish setae underneath. Tarsi sparsely pubescent above and with brush-like yellowish setae underneath.

Distribution. Borneo, Sarawak, Mt. Murud.

Etymology. Named in honour of my dear colleague Dr. Julio Ferrer ( Sweden), specialist in Tenebrionidae .

Figures

FIGURES 1 – 6. Habitus, dorsal view. 1. Hexarhopalus barclayi sp. nov. (holotype); 2. H. becvari sp. nov. (holotype); 3. H. ferreri sp. nov. (holotype); 4. H. iwani sp. nov. (holotype); 5. H. murudensis sp. nov. (holotype); 6. H. rolandi sp. nov. (holotype).