Ptomaphaginus ruzickai, 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 : 326-328

Ptomaphaginus ruzickai sp. nov.

( Figs. 15 A–M)

Type material. Holotype: CHINA, Sichuan: ♂, Baoxing, Fengtongzhai, 1680–2080 m, broad-leaved mixed forest, pitfall trap, 30.VI–3.VII.2001, Xiao-Dong Yu & Hong-Zhang Zhou legg. (IZ-CAS). Paratypes: 2♂♂, 3♀♀, same data as holotype except: 1680–2080 m (IZ-CAS); 1♀, Baoxing, Guobayangou, 2290 m, bamboo forest + broad-leaved forest, pitfall trap, 1–4.VII.2001, Xiao-Dong Yu & Hong-Zhang Zhou legg. (IZ-CAS); 1♂, same data as previous except: 2507 m, broad-leaved forest, 4–7.VIII.2003, Xiao-Dong Yu legg. (IZ-CAS); 1♂, Baoxing, Longdong, Ganyanggou, 1965 m, broad-leaved mixed forest, pitfall trap, 9–12.VIII.2003, Xiao-Dong Yu leg. ( IZ- CAS).

Description. Male. EBL: 2.54 mm. Length of different body parts: HL: AL: PL: ELL = 0.42: 0.67: 0.62: 1.37 mm; width: HW: EW: PW: ELW = 0.70: 0.09: 1.06: 1.12 mm. Proportion of antennomeres from base to tip in µm (length × width): 118 × 33, 101 × 41, 54 × 36, 41 × 37, 38 × 44, 23 × 50, 48 × 66, 22 × 66, 44 × 76, 48 × 78, 92 × 74.

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, elytral apex, and tarsi 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 moderately short and convex, transversely and superficially striolated, interspaces narrower than that on pronotum, HW/HL = 1.66; anterior margin round. Compound eyes well developed, EW/HW = 0.13. Antennae slender ( Fig. 15 A), AL/HW = 0.96; 5th slightly shorter than 4th; 6th about twice wider than long; 9th similar to 10th, wider than long; 11th pear-like.

Pronotum moderately transverse and convex ( Fig. 15 E), widest at hind corners, PW/PL = 1.70. 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: 37–39, interspaces narrower than that on elytra.

Elytra of medium length and regularly convex, widest at base, ELL/EW = 1.23. Sides feebly curved, gradually narrowing from base to apices; apices somewhat obliquely truncated ( Fig. 15 F). Surface transversely striolated, SE: 69–72. Metathoracic wings fully developed.

Prolegs robust, with basal three protarsomeres quite expanded ( Fig. 15 B): TW/BTW = 1.27. Spinal arrangement on ventral side of protibia as shown in Fig. 15 D. Profemora wider than protibiae, carried long hairs on ventral side. Mesotibiae moderately arcuate.

Ventrite VII with two moderately strong teeth at posterior margin and several blunt spines located on teeth ( Fig. 15 G). Ventrite VIII with a subtriangular fossa moderately deep, several blunt spines bordered lateral sides of fossa, and widely emarginate posteriorly ( Fig. 15 H). Segment IX: spiculum gastrale wide, flared at posterior end ( Fig. 15 I).

Aedeagus oblong in dorsal view ( Fig. 15 J): median lobe widest below middle and gently narrowed to both ends; opening of genital orifice trended to cut right margin of median lobe; right apical expansion strongly and roundly stuck out at apex; parameres distinctly widened at apical part, firmly attached to median lobe. Ventral operculum broad, only divided in apical part, each lobe feebly emarginate at apical margin ( Fig. 15 K). In lateral view, median lobe slightly bent ventrad, apex a little thinned, and several ventrally-oriented setae inserted below apex as well as two just before middle ( Fig. 15 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. 15 C), profemora without long hairs on ventral side and ventrites VII & VIII simple. Spermatheca very swollen at end ( Fig. 15 M).

Distribution. China (Sichuan).

Etymology. The specific epithet is dedicated to Dr. Jan Růžička (Czech University of Life Sciences, Prague, Czech Republic), a famous specialist on Agyrtidae , Silphidae and Leiodidae , for his kind help to our study.

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 15. Ptomaphaginus ruzickai 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.