Oncophyes amoenus (Hartmann)

Yunakov, Nikolai, 2012, 3535, Zootaxa 3535, pp. 1-104 : 46-47

Oncophyes amoenus (Hartmann)

(figs 11, 12, 343–355, 359, 365, 368)

Ellimenistes amoenus Hartmann, 1904: 386 . Cadoderus amoenus . Marshall (1926: 249). Oncophyes amoenus . Marshall (1942: 20).

Diagnosis. From Cadoderus species it strictly differs by large size [BL: 4.02–5.69 (4.96) mm; cupreous coloration of vestiture and large subscutellar callosity. From O. cadoderoides sp.n. differs by elytral interval 1 with row of setae; elytra background scaling with brown stripes at the elytral intervals 2 and 4; green scales absent; ventral side cupreous; vertex narrower [FW/ELD average: 0.77; in O. cadoderoides —0.81]; funicular segments 3–7 less oblong (3rd—1.50 x, 7th –1.10 x as long as wide); subscutellar callosity oblong, weakly convex.

Redescription.

Measurements. BL: 4.02–5.69 (4.97) mm, BW: 1.80–2.80 (2.38) mm, BH: 1.62–2.60 (2.175) mm.

Vestiture. Scales round, flat. Setae of head and body slender, truncate, form rows along lateral edges of epifrons (suberect) and above the eyes (erect). Subocular row consists of 2–3 setae. Pronotum evenly setose, without anterior setal fringe. Posterior setal fringe consists of spatulate setae, partly hidden by posterior edge of pronotum. Elytral intervals 1, 2, 4, 6 with distinct row of setae.

Coloration. Background scaling red-brown; striped pattern formed by brown, cupreous and white scales. Dark and pale scales both with slightly pronounced pearl shine. Head dorsal surface cupreous-brown, without stripes. Pronotum with cupreous-brown background scaling and 4 distinct longitudinal deep-brown stripes (2 thin median stripes and 2 broad lateral stripes). Elytra background scaling deep-brown with white V-shaped transversal band or cruciform spot at the middle and large median cupreous spot. Interval 1 cupreous. Ventral side cupreous. Femora and tibiae brown-cupreous, femora with transverse brown band in the middle.

Head. Rostrum as long as wide or weakly elongate [RL/RW: 1.00–1.10 (1.05)], parallel-sided. Pterygia not extended beyond contour of rostrum. Antennal sockets dorsal. Lateral carinae convex. Epifrons very narrow, parallel-sided, at the level of antennal articulation 2 x narrower than vertex, distinctly sloping at sides, with convex median carina (completely concealed by scales). Transverse sulcus deep, concealed by dense scaling at dorsal surface and at sides. Anterior portion of epifrons not steep, without median sulcus. Eyes sublateral, large, orbicular, flat, delimited by glabrous convex ring [FW/ELD: 0.67–0.81 (0.75)].

Antennae. Scape extended behind anterior edge of pronotum, reaches anterior 1/3, weakly, evenly curved, thick. Funicular segment 1 shorter than 2nd; segments 3–7 oblong (3rd—1.50 x as long as wide; 7th –1.1 x as long as wide).

Thorax. Pronotum strongly transverse [PL/PW: 0.84–0.89 (0.86)], evenly slightly convex at sides, constricted at apex. Lateral longitudinal carina weakly developed or absent. Disc weakly convex longitudinally and transversally. Tergosternal suture complete. Metanepisternal suture obsolete posteriorly.

Elytra. Cordate, anterior edge arcuate, vertical, narrowly rounded [EL/EW: 1.30–1.40 (1.35)]; disc in male moderately in female strongly convex [EL/BH: 1.40–1.56 (1.48)]; posterior declivity evenly sloping; elytral apex narrowly rounded, almost acute. Subscutellar callosity long and broad, weakly convex, without tubercles.

Legs. Protibiae and mesotibiae curved, not widened at the apex. Interior edge weakly C-shaped with large teeth in distal portion. Metatibiae with large teeth on interior edge. Mucro well developed, thorn-shaped, acute. Setal comb of protibiae consists of sparse 8–9 black short setae not extending beyond external edge of tibiae, partly hidden by spatulate setae. Bevel of metatibiae narrowly enclosed; its surface bare. Tarsi robust; setose pelma well developed; tarsomere 2 as long as wide; tarsomere 3 with two wide lobes; tarsomere 5 of metatarsus extending beyond apical lobes of 3rd by length of the last one.

Abdomen. Posterior margin of 1st ventrite arcuate. 2nd ventrite 2 x as long as 3rd one, posterior margin of 2nd ventrite straight. 5th ventrite in male flat, in female weakly convex near the apex; apical edge in male broadly rounded, in female narrowly rounded.

Male genitalia. Median lobe parallel-sided, tubular, in apical 1/3 evenly narrowed anteriorly; apex lanceolate, acute, strongly with strong median arcuate sharp carina; 0.7 x as long as apodeme. Internal sac with spiculate fields and small aggonoporium consisting of two curved lobes connected proximally by transverse bridge and long ventral slender process. Ostium lanceolate, strongly sclerotized. Ligulae membranous. Parameres long, fused in basal half, basal piece of tegmen narrow, tegminal apodeme 0.5 x as long as apodemes of median lobe.

Female genitalia. Spermatheca moderately sclerotized, with short broad ramus, collum slender, as long as ramus; corpus large, strongly swollen; cornus slender, extended beyond corpus. Spermathecal duct tubular at distal end ( Fig. 353). Tergite 8 narrowly-subtrapezoid, apically acute, with curved fringe of multiple tenuous, short setae at the apex. Sternite 8 thick. Lamella sharply narrowed and acute, without setae, knife-shaped, heavily sclerotized. Apodeme thick, caput large.

Distribution. Tanzania: West Usambara Mountains (figs 365, 368).

Bionomics. Montane rain forests. 1600–1700 m a.s.l. Trees and shrubs, canopy.

Type material. Tanzania: Lectotype ♀, here designated ( MTD) Tanga reg.: “Kwai, Weise [handwritten]”/ coll. J. Faust, Ankauf 1900 [blue, printed]/ Typus [red, printed]/ Lectotypus, Ellimenistes amoenus Hartman, Dr. E. Haaf, 1962 ; PLT m ( MTD): Tanzania: Tanga reg.: “ Usambara [Kraatz leg.,? handwritten]”/coll. J. Faust, Ankauf 1900 [blue, printed]/Typus [red, printed]; 1♂ “Kwai, Weise [handwritten]”/coll. J. Faust, Ankauf 1900 [blue, printed]; 1♂ “Usambara, Kraatz [handwritten]”/coll. J. Faust, Ankauf 1900 [blue, printed].

Material examined. Tanzania: 27♂, 23♀ ( ZMUC) Tanga reg., Lushoto distr. Mazumbai Forest Reserve , S4 49 E 38 29, 1650 – 1730 m, canopy fog 28-DD-DM, N. Scharff leg., 26.xi.1995 ; 1♂ ( ZMUN) TZ-11-86, Tanga Reg., West Usambara Mts., Bombo Forest Reserve , S4 48.966 E38 29.982 h = 1693 m, montane rain forest, beating, N.N. Yunakov leg., 22.v.2011 ; 1♂, 1♀ ( DEI) “Usambara, P. Weise/ coll. Kraatz / Cadoderus amoenus Hartm., Hustache det.” ; 2♂, 1♀ ( DEI) “ Usambara / coll. Pape / Cadoderus amoenus Hartm., Hustache det.”