Ptomaphaginus shennongensis, Wang, Cheng-Bin & Zhou, Hong-Zhang, 2015

Wang, Cheng-Bin & Zhou, Hong-Zhang, 2015, Taxonomy of the genus Ptomaphaginus Portevin (Coleoptera: Leiodidae: Cholevinae: Ptomaphagini) from China, with description of eleven new species, Zootaxa 3941 (3), pp. 301-338 : 328-330

Ptomaphaginus shennongensis sp. nov.

( Figs. 16 A–M)

Type material. Holotype: CHINA, Hubei: ♂, Shennongjia, Longmenhezhan, 1725 m, Cyclobalanopsis forest, pitfall trap, 28–30.VII.2002, Jie Wu leg. (IZ-CAS). Paratypes: 7♀♀, same data as holotype (IZ-CAS); 1♀, same data as holotype except: sifting, 28.VII.2002 (IZ-CAS); 1♂, 2♀, Shennongjia, Jiuchonggangou, 1240 m, pitfall trap, 18–21.VII.1998, Hong-Zhang Zhou leg. (IZ-CAS); 1♂, same data as previous except: sifting, Jun-Jian He leg. (IZ-CAS); 1♀, Shennongjia, Jiuchongwanjiagou, 900 m, sifting, 19.VII.1998, Hai-Sheng Zhou leg. (IZ-CAS); 1♂, Shennongjia, Guanmenshan, 1460 m, pitfall trap, 30.VII–11.VIII.1998, Hai-Sheng Zhou leg. (IZ-CAS).

Description. Male. EBL: 2.53 mm. Length of different body parts: HL: AL: PL: ELL = 0.39: 0.66: 0.62: 1.42 mm; width: HW: EW: PW: ELW = 0.68: 0.07: 1.07: 1.11 mm. Proportion of antennomeres from base to tip in µm (length × width): 115 × 34, 93 × 40, 60 × 38, 39 × 39, 38 × 46, 23 × 53, 46 × 66, 19 × 70, 47 × 79, 48 × 80, 96 × 80.

Habitus elongated oval, relatively convex and lustreless. Moderately pigmented: mostly chestnut brown; mouthparts, basal five antennomeres and apical half of ultimate antennomere, base of pronotum, and protarsi yellowish. Dorsum continually clothed with fine, recumbent and sallow pubescence. Insertions of pubescence on dorsal surfaces of head, pronotum, scutellum, elytra and femora align along transverse striolations.

Head short and convex, transversely and superficially striolated, interspaces narrower than that on pronotum, HW/HL = 1.73; anterior margin round. Compound eyes normally developed, EW/HW = 0.11. Antennae slender ( Fig. 16 A), AL/HW = 0.96; 5th as long as 4th; 6th wider than long; 9th similar to 10th, wider than long; 11th pear-like.

Pronotum moderately transverse and convex ( Fig. 16 E), widest just before hind corners, PW/PL = 1.72. Sides regularly curved, narrowing from posterior to anterior; hind corners drawn out and blunt. Posterior margin with distinct postero-lateral emargination. Surface transversely striolated, SP: 37–40, interspaces narrower than that on elytra.

Elytra slender and regularly convex, widest at about basal 1/3, ELL/EW = 1.28. Sides slightly curved, gradually narrowing from base to apices; apices somewhat obliquely truncated ( Fig. 16 F). Surface transversely striolated, SE: 67–69. Metathoracic wings fully developed.

Prolegs robust, with basal three protarsomeres strongly expanded ( Fig. 16 B): TW/BTW = 1.30. Spinal arrangement on ventral side of protibia as shown in Fig. 16 D. Profemora wider than protibiae, carried long hairs on ventral side. Mesotibiae moderately arcuate.

Ventrite VII slightly bisinuated at posterior margin ( Fig. 16 G). Ventrite VIII with a subtriangular fossa more or less narrow and shallow, widely emarginate posteriorly ( Fig. 16 H). Segment IX: spiculum gastrale wide, flared at posterior end ( Fig. 16 I).

Aedeagus oblong in dorsal view ( Fig. 16 J): median lobe widest below middle and slightly narrowed to both ends; opening of genital orifice trended to cut right margin of median lobe; right apical expansion moderately and roundly stuck out at apex; parameres long, reaching apical margin of median lobe and distinctly widened at apical part, firmly attached to median lobe. Ventral operculum broad, only divided in apical part, each lobe slightly emarginate at apical margin ( Fig. 16 K). In lateral view, median lobe gently bent ventrad, apex a little thinned, and several ventrally-oriented setae inserted below apex as well as two just before middle ( Fig. 16 L). Internal stylus wide, multiannulate at about basal 1/3 and many spinules on left part of preapical area.

Female. Similar to male in general appearance, except for the following characters: protarsi normal ( Fig. 16 C), ventral side of profemora without long hairs and ventrites VII & VIII simple. Spermatheca very swollen at end ( Fig. 16 M).

Distribution. China (Hubei).

Etymology. The specific epithet is from the Chinese name (Pinyin) of the type locality “Shennongjia” in Hubei province, China.

Remarks. Table 1 shows some important difference of four closed-allied species: P. pingtungensis Perreau , P. guangxiensis sp. nov., P. ruzickai sp. nov., and P. shennongensis sp. nov.

Figures

FIGURE 16. Ptomaphaginus shennongensis sp. nov.: A, antenna ♂ (dorsal view); B, proleg ♂ (dorsal view); C, protarsus ♀ (dorsal view); D, protibia ♂ (ventral view); E, pronotum ♂ (dorsal view); F, elytral apex ♂ (dorsoapical view); G, ventrite VII ♂ (ventral view); H, ventrite VIII ♂ (ventral view); I, abdominal segment IX ♂ (ventral view); J, aedeagus (dorsal view); K, aedeagus (ventral view); L, aedeagus (lateral view); M, spermatheca. Scales: 0.1 mm.