Dermestocyphon (Himacyphon), 2013

Ruta, Rafał, Yoshitomi, Hiroyuki & Klausnitzer, Bernhard, 2013, Review of the genus Dermestocyphon (Coleoptera: Scirtidae: Scirtinae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 253-285 : 281-283

Dermestocyphon (Himacyphon) sp.

( Figs 16–17 , 111–120 )

Material examined. NEPAL: 1 ♀ ( BMNH), “TAPLEJUNG DISTR: Dobhan, E bank of River Tamur. c.3500'”, “Mixed vegetation by stream in deep gully. i–ii.1962.”, “BRIT. MUS. East Nepal Exp. 1961–62. R.L. Coe Coll. B.M. 1962–177”.

Description of female. Body elongate (TL/EW 1.88), dark brown ( Fig. 16 ). Antennomeres 1–3 and legs lighter, yellowish brown. Basal portion of elytra seeming yellowish, what is caused by the presence of peculiar excitator-like structures ( Fig. 17 , see below). Scutellum very convex, covered with dense punctures. Elytra with transverse depressed area behind scutellum, with a fungiform outgrowth (diameter 0.07 mm) in adsutural portion of each elytron. Apical portion of elytra with a transversely elevated area and a pair of round depressions (diameter ca. 0.20 mm), each with a fungiform outgrowth (diameter 0.09 mm) in its central portion. Three microsculptured areas are present on each elytron: in anterior portion of elytra (along basal margin, microsculpture is so dense that the surface of elytra is opaque and seems to be yellowish), near outer margin of lateral portion, and near outer margin of posterior portion ( Figs 111–115 ). Sternite VII triangular (L 0.44 mm; W 0.93 mm), caudal margin straight, with membranous flap ( Fig. 116 ). Tergite VII (L 0.52 mm, W 0.72 mm) with concave structure at mesal portion of apical margin. Tergite VIII with rectangular plate (L 0.28 mm, W 0.25 mm) with fine hairs at margin, and long apodemes (L 1.12 mm). Sternite VIII (L 0.62 mm, W 0.23 mm) with long diverging plate, distal margin on both sides rounded, with a group of fine hairs. Ovipositor relatively long ( Fig. 117 ); proctiger membranous; lateral processes elongate, with two tufts of setae; coxites (L 0.32 mm) membranous. Distal bursellar sclerites not discernible. Proximal bursellar sclerite (L 0.15 mm; W 0.26 mm) with long outgrowth at proximal margin (L 0.08 mm) and two sharp carinae covered with minute denticles on ventral portion ( Figs 118–119 ).

Remark. We have carefully examined all available male specimens belonging to the subgenus Himacyphon in search of cryptic species corresponding to the above female. No significant morphological differences were noticed in the males examined and all of them are hence considered as belonging to D. (H.) optatus .

Figures

Figs 7–17. Habitus of Dermestocyphon (Oreocyphon) (7–13) and Dermestocyphon (Himacyphon subgen. nov.) (14-17): 7 – D. brancuccii sp. nov., holotype; 8 – D. honorus (Klausnitzer, 1980), male; 9 – ditto, female; 10 – ditto, apex of elytra; 11 – D. niisatoi sp. nov., paratype; 12 – D. thailandicus sp. nov., holotype, male; 13 – D. umbratilis, (Klausnitzer, 1976), female; 14 – D. optatus (Klausnitzer, 1980), male; 15 – ditto, female; 16 – D. sp., female; 17 – ditto, frontal view. Scale bars = 1.0 mm (7–9, 11–16).

Figs 111–115.Dermestocyphon (Himacyphon) sp., female:111 – left elytron, light micrphotography:A, B – fungiform excitators, C, D, E – microreticulated patches; 112 – adscutellar excitator (A), close-up, light microphotography; 113 – apical excitator (B), close-up, light microphotography; 114 – lateral microreticulated patch (D), close-up, light microphotography; 115 – dorsolateral view.

Figs 116–120. Dermestocyphon (Himacyphon) sp., female: 116 – sternite and tergite VII; 117 – female genital tract; 118 – bursella with proximal bursellar sclerite; 119 – priximal bursellar sclerite, lateral view; 120 – bursella, close-up. Scale bar = 0.5 (117).