Ptomaphagus (s. str.) masumotoi Nishikawa, 2011

Wang, Cheng-Bin, Perreau, Michel, Ruzicka, Jan & Nishikawa, Masaaki, 2017, Revision of the genus Ptomaphagus Hellwig from eastern Asia (Coleoptera, Leiodidae, Cholevinae), ZooKeys 715, pp. 69-92 : 75-79

Ptomaphagus (s. str.) masumotoi Nishikawa, 2011 Figs 1 C–D; 4 A–J; 5 A–F

Ptomaphagus (s. str.) masumotoi Nishikawa, 2011: 97 ( Ptomaphagus (Ptomaphagus) ; type locality: NW Thailand, Chiang Mai, Doi Inthanon [ca. 18°42'N, 098°59'E], 1750 m; NSMT).

Material examined.

Type material. Holotype: ♀, Doi Inthanon / 1750 m, Chiang / Mai, Thailand / 9-XI-1995 / K. MASUMOTO leg. // Holotype / Ptomaphagus ( Ptomaphagus ) / masumotoi M. Nishikawa, / 2011 / Design. M. Nishikawa, 2011 / # MNC 146Ch2P ♀ (NSMT). Paratype: 1♂, same data as holotype except: # MNC 147Ch2P ♂ (NSMT).

Redescription.

Male. EBL: 3.4 mm. Length of different body parts: HL: AL: PL: ELL = 0.6: -: 0.8: 2.0 mm; width: HW: EW: PW: ELW = 0.8: 0.1: 1.3: 1.5 mm. Proportion of antennomeres from base to tip in μm (length × width): 121 × 57, 105 × 62, 71 × 65, 48 × 70, 53 × 82, 35 × 92, 94 × 111, 28 × 101, 83 × 112 (last two antennomeres missing).

Habitus (Fig. 1C) elongated oval, regularly convex and sublustrous. Well pigmented: mostly brown; mouthparts, basal three antennomeres and apical half of ultimate antennomere, protarsi, and apex of meso- and metatarsi more or less paler. Dorsum continually clothed with fine, recumbent, yellowish pubescence. Insertions of pubescence on dorsal surfaces of pronotum, elytra and femora aligned along transverse striolations; interspace between two striolations glabrous.

Head transverse, HW/HL = 1.5. Clypeofrontal suture absent. Clypeus with anterior margin gently rounded. Compound eyes well developed, EW/HW = 0.1. Antennae (Fig. 4A) slender; antennomere III shorter than II; VI with length/width = 0.4; X and XI of holotype missing.

Pronotum (Fig. 4B) transverse, widest around hind angles, PW/PL = 1.6. Sides gently arched, simply narrowing from posterior to anterior; hind angles not projected backwards and bluntly rounded. Posterior margin widely protruded in middle part, emarginate near hind angles.

Elytra oval, widest at about basal 2/7, ELL/EW = 1.4. Sides weakly arched, gradually narrowing from widest part to apices; apices (Fig. 4G) narrowly rounded. Sutural striae present. Metathoracic wings fully developed.

Prolegs robust, with basal three protarsomeres (Fig. 4C) strongly expanded: TW/BTW = 1.0. Protibiae (Fig. 4E) strongly expanded towards apex. Profemora broad. Mesotibiae gently arcuate, mesotarsi simply linear. Metatibiae straight, but relatively short and thick.

Abdominal ventrite VIII (Fig. 4I) emarginate at posterior edge. Spiculum gastrale (Fig. 4J) of genital segment with about 1/5 of length protruding beyond anterior edge of epipleurite IX.

Aedeagus (Fig. 5A) slender, with median lobe gradually narrowing towards an oblong apex and terminated to a shortly rounded knob in dorsal view; opening of genital orifice situated on dorsal surface, deeply cut inwards on preapical left margin of median lobe. Ventral surface of the apex of the median lobe (Fig. 5C) inserted with five ventrally oriented setae on the left side and six ventrally oriented setae on the right side; parameres narrow, reaching about apical 1/7 of median lobe, each apex (Fig. 5D) with two long lateral setae and one similar apical seta. In lateral view (Fig. 5B), median lobe regularly bent ventrally but almost straight in apical half, and gradually tapering to a acuminate apex. Endophallus with stylus quite slender, a transverse nodule in middle region, a cheliform complex just below base of stylus, and a circular complex in the basal region.

Female. Similar to male in general appearance (Fig. 1D), including elytral apices (Fig. 4H), but distinguished by the following characteristics: protarsi (Fig. 4D) simply linear; protibiae (Fig. 4F) slightly narrower; abdominal ventrite VIII (Fig. 5E) slightly protruded at median of posterior edge; genital segment and ovipositor as shown in Fig. 5F; spermatheca (Fig. 5F) sinuous or coiled in distal part, not coiled in proximal part.

Distribution.

Thailand.