Cyphochilus reichenbachi n. sp.

Figs 62-64

Holotype: MHNG (MHNG-ENTO-81701); 1 ♂; VIETNAM: // North Vietnam, Tam Dao / Vinh huc prov . 1010 m / 21˚27.588’ N, 105˚38.475 E / IV.2014, leg. Hoa Binh (P) // HOLOTYPUS ♂ / Cyphochilus / reichenbachi mihi / G. Sabatinelli, 2020 (T on red) //.

Paratypes: 32 specimens.

VIETNAM: MHNG; 1 ♂; Tonkin; ach. Baudet . – PCAR; 1 ♂; same data as holotype . – PCAR; 1 ♂; North Vietnam, Tam Dao, 400-900 m; VI-VII.2012; leg. Hoa Binh Nguyen . – PCAR; 2 ♂; North Vietnam, Tam Dao, 400- 900 m; 18.VI.2012; leg. Hoa Binh Nguyen . – MHNG; 10 ♂, 1 ♀; North Vietnam, Ta Phin 10 km NNW Sapa, ca. 1700 m; III.2012; leg. Binh Nguen. – PCAR; 15 ♂; same data as previous . – PCDK, 1 ♂, Ha Giang .

Description of the holotype male: Size – BL: 19.6 mm, BW: 8.3 mm, BWX: 10.9 mm, situated at midpoint of elytra. Color. Integument dark shiny brown; dorsal surface with scattered yellow scales aggregated along lateral part of the body. Head – CW/L: 3; anterolateral edges of clypeus rounded, lateral edges of clypeus curved and divergent posteriad; frons large, making eyes relatively small, not prominent (F/O: 4.7); antennal club longer than antennomeres 2-7 (A2-7/CL: 0.86). Pronotum – Transverse (PnW/L: 2), strongly convex; apical angles and lateral margins flattened, apical angles right, not protuberant; basal lateral margins straight, basal angles obtuse and largely rounded. Elytra – Without any visible striae. Thoracic sterna – Surface with short, white pubescence and scales; mesosternum slightly developed anteriorly (MstL: 0.64 mm) however, visible in lateral view between the mesocoxae. Abdomen – Sternites with sparse scales; pygidium convex with apical margin narrowly reflected. Legs – Protibia tridentate with the basal tooth well developed; slender apical tooth longer than the middle one. Aedeagus – Parameres strongly asymmetric with four appendices (Figs 62-64).

Variability: BL: 18.5-20.5 mm (x = 19.5, n = 30).

Females: BL: 18 mm, BW: 7.5 mm, BWX: 10.5 mm; antennal club ovate, shorter than preceding antennomeres (A2-7/CL: 1.5).

Etymology: Andreas Reichenbach (Leipzig, Germany) is a scarabeologist and he provided me with several Cyphochilus specimens for study, among them the new species here described.

Distribution: This species is known from several localities in northern part of Vietnam.

Remarks: Cyphochilus reichenbachi can be readily separated from all other congeners by the unique shape of the parameres strongly asymmetric with four appendices.