Platystethus spectabilis Kraatz, 1859

Lü, Liang & Zhou, Hong-Zhang, 2015, Review of the Genus Platystethus Mannerheim (Coleoptera: Staphylinidae: Oxytelinae) in China, Zootaxa 3915 (2), pp. 151-205 : 185-187

9. Platystethus spectabilis Kraatz, 1859

( Figs. 21 ; 22; 33A–D)

Kraatz, 1859: 170 (Type locality: Indiae orientalis pars borealis); Bernhauer & Schubert, 1911: 124; Cameron, 1930: 268 (characters); Scheerpeltz, 1933: 1109; Gaedike, 1981: 221 (types in SDEI); Zheng, 1998: 252 ( China); Herman, 2001a: 1487; Smetana, 2004: 519 (subgenus Craetopycrus ); Yan, Li & Zheng, 2012: 342 ( China).

Type material examined. Lectotype [inadvertently designated by Gaedike (1981) referring to label of P. M. Hammond placed in 1969, Fig. 33 A–D]: ♂, LECTO-TYPE// 1388// India spt, Bacou leg.//Bernhauer det.// Platystethus spectabilis Kr. // Dtsch. Ent. Inst. Eberswalde// Platystethus spectabilis Kraatz, P.M.Hammond , det. 1969, LECTOTYPE ♂// DEI Müncheberg Col—0 3387 ( SDEI). Paralectotype: 1♂, PARA-LECTO-TYPE// India spt, Bacou leg.//Bernhauer det.// Dtsch. Ent. Inst. Eberswalde// Platystethus spectabilis Kraatz, P.M.Hammond , det. 1969, PARALECTOTYPE ♂// DEI Müncheberg Col—0 3388 ( SDEI).

Other material examined. 51 specimens, 33♂♂, 18♀♀. CHINA: Yunnan: 1♂, Xishuangbanna, Damenglong [=Menglong Township, 21.58ºN 100.68ºE], 650 m, 1958. VIII.7, L.- Y. Zheng leg., Platystethus spectabilis Kr. det. P.M.Hammond, 1980(IZ-CAS); 1♀, data same as previous except: 1958. VII.10 (IZ-CAS); 1♀, data same as previous except: X.-W. Meng leg. (IZ-CAS); 2♂♂, 2♀♀, data same as previous except: 1958. VII.12, Y.-R. Zhang leg., Platystethus spectabilis Kr. det. P.M.Hammond, 1980 (IZ-CAS); 1♀, data same as previous except: L.- Y. Zheng leg. (IZ-CAS); 1♂, Menghun [21.84ºN 100.38ºE], 750 m, 1958. VI.4, Y.-R. Zhang leg., Platystethus spectabilis Kr. det. P.M.Hammond, 1980 (IZ-CAS); 1♂, data same as previous except: S.- Y. Wang leg. (IZ-CAS); 1♂, Yunjinghong [=Jinghong, 22.00ºN 100.80ºE], 850 m, 1958. VI.25, L.- Y. Zheng leg., Platystethus spectabilis Kr. det. P.M.Hammond, 1980 (IZ-CAS). MALAYSIA: 1♂, Penang, Bumbong Lima, 1972. V.22, Oxytelus det. Newton, 1995 ( FMNH). VIETNAM: 2♂♂, Tonkin, Hoa-Binh, A. de Cooman leg., Platystethus spectabilis Kr. det. P.M.Hammond, 1980; 8♂♂, 8♀♀, Prov. Ha-Tinh, forestière Hüöng-sön, 150m, forêt trop. pluv., à la lumière [= in light], 1963. VIII.14, T. Pócs leg. ( HNHM); 4♂♂, 1♀, same data as previous except: 1963. VIII.15 ( HNHM); 1♂, same data as previous except: 1963. VIII.19 ( HNHM); 1♂, Prov. Nghe-An, forestière Quy-châu, 200 m, à la lumière, forêt pluv. trop., semidecid., 1963. VIII.28, T. Pócs leg. ( HNHM); 3♂♂, Ha Son Binh, Than Loc, at light, No. 85, 1986. I.30, Mahunka & Oláh legg. ( HNHM); 6♂♂, 4♀♀, Tuong linh, near Phu ly, collected by lamp, Nr. 565, 1966. V.24–28, Gy. Topál leg. ( HNHM); 1♂, Nghe An Prov., Po Phuong village, 280 m, at light, 1999. X.21–22, 19 º38.442′N 104º58.302′E, Ference Kassai leg. ( HNHM).

Redescription. Body ( Fig. 33 A) shiny and latericeous; elytra yellowish. Length [average]: ♂, 3.7 mm; ♀, 3.4 mm.

Male. Head ( Figs. 21 A; 22A) broadest at eyes. Disc less pubescent, with dense punctures, surface without micro-striae. Clypeus transverse, surface punctate, protruding beyond anterior border of supra-antennal ridges, anterior margin with two tiny teeth between which with semicircular emargination, furnished a pair of sharp and slender spines slightly outcurved. Epistomal suture with middle portion absent, lateral posteromedially directed. Supra-antennal ridges elevated. Vertex depressed in anterior part, slightly convex in center; mid-longitudinal suture absent. Eyes convex, longer than temples, with coarse facets; orbital sulcus remarkable. Temple slightly dilated laterally. Neck constricted, and demarcated by occipital suture, surface delicate in dorsal center but coriaceous in lateral areas. Occipital suture curved, middle portion punctate and continuous, lateral portion present, with large setal fovea at each 1/3. Mandible ( Fig. 22 D) stout, sharp, and incurved; bearing 3 teeth on inner edge: front one large, other two fine.

Pronotum ( Figs. 21 A; 22A) narrower than head, widest at anterior 1/4, with mid-longitudinal sulcus present across whole length, with punctures as dense and large as in head, with micro-striae absent; anterior margin broadly emarginate, anterior lateral angles prominent, posterior angles rounded; lateral margins crenulate, beside each with shallow punctate depression. Scutellum with two bi-reniform impression. Elytra ( Fig. 33 B) with posterior margin truncate, elytral suture dehiscent or partly overlapping.

Abdominal sternite VII ( Figs. 21 C; 22F; 33C) with haired tubercle in center, posterior margin straight without modification. Sternite VIII ( Figs. 21 D; 22G; 33C) posteriorly narrowed and truncate in middle; subbasal ridges continuous in middle.

Aedeagus ( Figs. 21 G–I; 22J–M) with median lobe inflated at base, slightly constricted at apical 1/3; apical orifice large and fissured to apical 1/3 of ventral surface, edges of ventral fissure protruding into a pair of long spines with tips rounded; internal sac sclerite-like or membranous, not rolling, with reversed hook exerted from apical orifice. Paramere arm-like; basal arm with furrow short and narrow; apical arm triangular at apex, not explanate, furnished with one seta at apex and one at near apex of ventral edge, scattered with few pits.

Female. Head ( Figs. 21 B; 22B) smaller than male and almost equal to pronotum; clypeus with spines reduced into teeth, another one tiny tooth in middle; eyes longer than temples. Pronotum ( Figs. 21 B; 22C) widest at apical 1/3, anterior lateral angles not prominent. Abdominal sternite VII without tubercle, sternite VIII ( Figs. 21 E; 22H) with posterior margin broadly rounded.

Spermatheca ( Figs. 21 F; 22I) with basal part inflated, with apical part thin and curved.

Distribution. China (Yunnan); India, Nepal, Vietnam, Philippines, Malaysia.

Figures

FIGURE 21. Platystethus spectabilis Kraatz, 1859 I: A, head and pronotum ♂ (dorsal view); B, head and pronotum ♀ (dorsal view); C, sternite VII ♂; D, sternite VIII ♂; E, sternite VIII ♀; F, spermatheca; G, aedeagus (ventral view); H, median lobe of aedeagus (lateral view); I, right paramere (in situ) of aedeagus (lateral view). Scales: A, B = 0.5 mm; F = 0.05 mm; rest, 0.2 mm.

FIGURE 22. Platystethus spectabilis Kraatz, 1859 II: A, head and pronotum ♂ (dorsal view); B, C, head and pronotum ♀ (dorsal view); D, right mandible ♂; E, right mandible ♀; F, sternite VII ♂; G, sternite VIII ♂; H, sternite VIII ♀; I, spermatheca; J, aedeagus (ventral view); K, aedeagus (dorsal view); L, median lobe of aedeagus (lateral view); M, right paramere (in situ) of aedeagus (lateral view). Scales: I = 0.05 mm; rest, 0.2 mm.

FIGURE 33. Lectotype of Platystethus spectabilis Kraatz, 1859 (A – D), P. quedenfeldti Weise, 1879 (E – I), and P. macropterus Weise, 1875 (syn. of P. oxytelinus Fauvel, 1875) (J – L): A, E, J, habitus ♂ (dorsal view); B, F, K, forebody ♂ (dorsal view); C, H, last 3 abdominal segments ♂ (ventral view); D, I, L, labels of the lectotypes in SDEI; G, impression on scutellum. Scales: G = 0.1 mm; rest, 0.5 mm.