Ptomaphaginus pingtungensis Perreau, 1996

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 : 313-314

Ptomaphaginus pingtungensis Perreau, 1996

( Figs. 7 ; 8A–K)

Perreau, 1996: 287 ( Ptomaphaginus ; Type locality: CHINA, Taiwan: Pingtung Hsien, Pietawushan, 2000 m); Perreau, 2000: 374 ( Ptomaphaginus ; catalog).

Material examined. Paratype: CHINA, Taiwan: 1♂, Pingtung Hsien, Pietawushan, Kuai-Ku Hut, 2325 m, 22.V.1991, A. Smetana [T90] // PARATYPE, Ptomaphaginus pingtungensis M. Perreau det. 1995 // Coll. M. Perreau ( CMPR).

Redescription. Male. EBL: 2.56 mm. Length of different body parts: HL: AL: PL: ELL = 0.43: 0.71: 0.69: 1.33 mm; width: HW: EW: PW: ELW = 0.72: 0.09: 1.15: 1.17 mm. Proportion of antennomeres from base to tip in µm (length × width): 117 × 51, 104 × 40, 66 × 31, 44 × 32, 49 × 38, 27 × 45, 48 × 56, 20 × 61, 46 × 69, 50 × 72, 98 × 69.

Habitus elongated oval, relatively convex and lustreless. Moderately pigmented: mostly chestnut brown; only mouthparts, basal five antennomeres and apical half of ultimate antennomere, 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 ( Fig. 7 ).

Head moderately short and convex, transversely and superficially striolated, interspaces narrower than that on pronotum, HW/HL = 1.65; anterior margin round. Compound eyes slightly reduced, EW/HW = 0.09. Antennae slender ( Fig. 8 A), AL/HW = 0.99; 5th longer than 4th; 6th, 9th and 10th wider than long; 11th pear-like.

Pronotum transverse and convex ( Fig. 8 C), widest just before hind corners, PW/PL = 1.67. Sides curved, narrowing from posterior to anterior; hind corners drawn out and slightly acute. Posterior margin with distinct postero-lateral emargination. Surface transversely striolated, SP: 44–46, interspaces narrower than that on elytra.

Elytra short and weakly convex, widest at about basal 1/3, ELL/EW = 1.13. Sides curved, gradually narrowing from base to apices; apices somewhat obliquely truncated ( Fig. 8 D). Surface transversely striolated, SE: 67–70. Metathoracic wings fully developed.

Prolegs robust, with basal three protarsomeres not much expanded ( Fig. 8 B): TW/BTW = 1.52. Spinal arrangement on ventral side of protibia as shown in Fig. 8 B. Profemora wider than protibiae, and hairs on ventral side similar to that of protibiae. Mesotibiae arcuate.

Ventrite VII simple ( Fig. 8 E). Ventrite VIII with a subtriangular fossa moderately deep, several subacute spines bordered lateral sides of fossa, and distinctly emarginate posteriorly ( Fig. 8 F). Segment IX: spiculum gastrale slender, flared at posterior end ( Fig. 8 G).

Aedeagus oblong in dorsal view ( Fig. 8 H): median lobe widest around middle and slightly narrowed to both ends; opening of genital orifice trended to cut right margin of median lobe; right apical expansion regularly and subroundly stuck out at apex; parameres slightly widened towards apex, firmly attached to median lobe. Ventral operculum invertedly piriform, only divided a little at apex, each lobe widely subrounded at apical margin ( Fig. 8 I). In lateral view, median lobe gently bent ventrad, apex a little thinned, and four ventrally-oriented setae inserted below apex as well as two just before middle ( Fig. 8 J). Internal stylus wide.

Female. Unexamined. Spermatheca swollen at end ( Fig. 8 K; after Perreau, 1996).

Distribution. China ( Taiwan).

Remarks. The aedeagi of P. pingtungensis Perreau, P. g uangxiensis sp. nov., P. ruzickai sp. nov., and P. shennongensis sp. nov. are closely allied and easily confused. We compared them in detail with some selected but important morphological characters to show their differences and to make it easy for species identification ( Table 1 ).

Figures

FIGURE 7. Ptomaphaginus pingtungensis Perreau, 1996 ♂: habitus (dorsal view; paratype). Scales: 1 mm.

FIGURE 8. Ptomaphaginus pingtungensis Perreau, 1996: A, antenna ♂ (dorsal view); B, proleg ♂ (ventral view); C, pronotum ♂ (dorsal view); D, elytral apex ♂ (dorsoapical view); E, ventrite VII ♂ (ventral view); F, ventrite VIII ♂ (ventral view); G, abdominal segment IX ♂ (ventral view); H, aedeagus (dorsal view); I, aedeagus (ventral view); J, aedeagus (lateral view); K, spermatheca (after Perreau, 1996). Scales: 0.1 mm.