Philydrodes (Minyphilydrodes) wrasei Shavrin

Shavrin, Alexey V., 2017, Five new species of the genus Philydrodes Bernhauer, 1929 from China (Coleoptera: Staphylinidae: Omaliinae: Anthophagini), Zootaxa 4231 (2), pp. 169-186 : 184-185

Philydrodes (Minyphilydrodes) wrasei Shavrin , sp.n.

( Figs. 5 , 38, 41 , 48–49, 56–57, 58)

Type material examined: Holotype ♂ [ The preparation of aedeagus and apical abdominal segment in Canadian balsam was attached under the card with specimen]: SICHUAN PROVINCE: ‘ CHINA W. Sichuan (Ya `after an | Pref., Tianquan Co.) | E Erlang Shan Pass, 2900m | 9 km SE Luding, 29°52N/ | 102°18E (brook bank) | 20.–22.VI.1999 D.W. Wrase’ <rectangular label, printed>, ‘ Sammlung | M. Schülke | Berlin’ <green rectangular label, printed>, ‘ HOLOTYPE | Philydrodes (Minyphilydrodes) | wrasei sp.n. | Shavrin A.V. des. 2016’ <red rectangular label, printed> ( MNHUB) .

Paratypes: SICHUAN PROVINCE: 8 ♂ [The preparation of aedeagus, abdominal tergite VIII, sternite VIII and apical abdominal segment in Canadian balsam was attached under the card with specimen] , 6 ♀ [The preparation of abdominal tergite VIII, sternite VIII and apical apical abdominal segment in Canadian balsam was attached under the card with beetle]: same data as the holotype (4 ♂, 2 ♀: cSch; 1 ♂, 1 ♀: BMNH; 1 ♂, 1 ♀: CNC; 2 ♂, 2 ♀: cS; 1 ♂, 1 ♀: NSMT) ; 10 ♂, 10 ♀: ‘ CHINA: W-Sichuan 20. VI. 1999 | Ya `an Prefecture , Tianquan Co. | E Erlang Shan Pass, 2900 m | 9 km SE Luding, 29°52N, | 102°18E, Bachufer, Moos + | Schotter, leg. M. Schülke’ <the same locality as the holotype; specimens were taken by sifting in mixed deciduous and coniferous with Salix forest near water, along small creeks in the forest and under stones; M. Schülke, pers. comm.>, <rectangular label, printed>, ‘ Sammlung | M. Schülke | Berlin’ <green rectangular label, printed> (1 ♂, 1 ♀: CNC; 6 ♂, 6 ♀ - cSch; 2 ♂, 2 ♀: cS; 1 ♂, 1 ♀: NSMT) ; 1 ♀: ‘ China, S.W. Sichuan | pass Riwa – Lamuge 4200m | N 28°34ʹ03.2ʹʹ, E 100°11ʹ27,1ʹʹ | 28.6.2006. lgt. Janata M. ’ <rectangular label printed>, ‘ Museum für Naturkunde | Berlin | Sammlung M. Schülke’ <rectangular label, printed> (cSch) ; 1 ♂: ‘ CHINA: W-Sichuan (15) | Daxue Shan, Hailuogou Glacier | Park , Camp 2, 2550– 2700 m | 29.35.16N, 102.01.53E | 30./ 31.05.1997, M. Schülke’ <rectangular label, printed>, ‘ Museum für Naturkunde | Berlin | Sammlung M. Schülke’ <rectangular label, printed> (cSch).

All paratypes with my additional label: ‘ PARATYPE | Philydrodes (Minyphilydrodes) | wrasei sp.n. | Shavrin A.V. des. 2016’ <red rectangular label, printed>.

One specimen without abdomen was not included to the type series: ‘ CHINA: W-Sichuan 20. VI. 1999 | Ya `an Prefecture, Tianquan Co. | E Erlang Shan Pass, 2900 m | 9 km SE Luding, 29°52N, | 102°18E, Bachufer, Moos + | Schotter, leg. M. Schülke’ <rectangular label, printed>, ‘ Sammlung | M. Schülke | Berlin’ <green rectangular label, printed> (cS).

Description. Measurements (n=37): WH: 0.70–0.85; LH: 0.50–0.59; LA (holotype): 2.43; LE: 0.15¯0.24; LT: 0.12¯0.15; LPM/WPM (holotype): III: 0.23 × 0.07, IV: 0.08 × 0.03; LP: 0.61–0.80; WPMax: 0.65–0.83; WPMin: 0.50–0.69; LEl: 1.00–1.45; WE: 1.45–1.80; WA: 1.30¯1.73; LMTb: 1.10–1.15; LMTr: 0.33–0.35; LAed: 0.56– 0.65; TL: 3.58–4.60 (holotype: 3.75).

Body (mature specimens) reddish brown to brown, sometimes elytra contrastly paler, yellow brown to reddish brown; mouthparts, antennae, basal narrow margin of pronotum and legs yellowish brown to red brown; mandibular palpomeres 2, 4, ocelli, bases of antennomeres 1¯2 and tarsi yellow to yellow brown. Punctation of head small, sparsely spaced, more or less regular; punctation of pronotum larger, deeper and denser than that on head, with small elongate or oval impunctate area in medio-basal portion (some specimens with narrow impunctated longitudinal band); punctation of elytra dense, distinctly larger than that on pronotum, interspaces between punctures in median part of each elytron equal to diameter of 2–4 nearest punctures; abdomen with fine regular small punctation. Pronotum with fine microsculpture, indistinct in medio-basal and lateral portions, coarser along basal margin. Habitus as in Fig. 5 .

Head 1.4 times as broad as long. Eyes 1.3–1.6 times longer than temples. Maxillary palp segment 3 slightly less than three times longer than apical (4th) segment. Antennomeres with lengths widths (holotype): 1: 0.30 0.10; 2: 0.17 0.05; 3: 0.26 0.05; 4–6: 0.20 0.06; 7–10: 0.20 0.07; 11: 0.30 0.07.

Pronotum 1.02–1.07 times narrower than head, slightly broader than long. Elytra 1.6–1.8 times longer than pronotum, 1.2–1.4 times broader than long. Metarsomere slightly more than three times shorter than length of metatibia. Abdomen slightly narrower than width of elytra.

Male. Apical margin of abdominal tergite VIII with wide emargination (Fig. 48). Apical margin of abdominal sternite VIII with moderately deep emargination (Fig. 56). Aedeagus ( Fig. 38 ) with moderately small phallobase, narrowing in median part towards apex forming two very short wide latero-apical and extended apical projections with rounded apices; parameres moderately thin, distinctly longer than apex of aedeagus, with two apical and two latero-apical short setae; aedeagus with strongly sclerotized narrow dorsal lobes with small rounded apex exceeding apex of aedeagus with very thin flagellum within it; endophallus with paired narrow fields of thorns and two apical portions with long setae (see inverted internal sac in Fig. 38 ). Aedeagus laterally as in Fig. 41 .

Female. Apical margins of abdominal tergite VIII (Fig. 49) and sternite VIII (Fig. 57) widely rounded.

Comparative notes. Based on the shape of apical portion of aedeagus with latero-apical and apical projections, Ph. wrasei sp.n. is similar to Ph. tridentatus sp.n. and Ph. tibetanus sp.n. From Ph. tridentatus sp.n. it differs by the longer parameres and dorsal lobes, by the slightly wider temples, by the narrower pronotum and shorter elytra. From Ph. tibetanus sp.n. it differs by the significantly narrower flagellum and by the more simple structure of the internal sac, by the more distinct punctation of head, by the smaller punctation of slightly narrower pronotum. From both species it differs by the general shape of the aedeagus, its narrower phallobase and median lobe, and by the shorter latero-apical projections of the median lobe.

Etymology. The species is named after carabidologist David Wrase (Berlin), who collected some type specimens.

Distribution. The new species is known from type localities ( Fig. 58 ) in Erlang Shan and Daxue Shan ranges in Sichuan, China.

Bionomics. According to personal communication of M. Schülke, the specimens from the Eastern Erlang Shan Pass were collected (together with Ph. michaeli sp.n.) by sifting in the mixed deciduous and coniferous forest with Salix near water and along small creeks in the forest and under stones. The specimens from the Camp 2 at the Gongga Shan trail were collected surrounded by a primary mixed forest with large amonts of dead wood near small creeks, mostly from thermal sources, one of them was directly inside the camp. The species is recorded from elevations between 2550 m a.s.l. to 4200 m a.s.l. The beetles were collected from May to June.

Figures

FIGURE 58. Distribution of Philydrodes in China: Ph. tridentatus (black circles), Ph. michaeli (black star), Ph. reticulatus (black square), Ph. tibetanus (black rhomb), Ph. wrasei (black triangle).

FIGURES 1 – 5. Habitus of Philydrodes: 1 — Ph. tridentatus, holotype, 2 — Ph. michaeli, paratype, 3 — Ph. reticulatus, paratype, 4 — Ph. tibetanus, holotype, 5 — Ph. wrasei, paratype. Scale bars 1.0 mm.

FIGURES 36 – 41. Aedeagus of Philydrodes michaeli (36, 39: holotype), Ph. reticulatus (37, 40: paratype) and Ph. wrasei (38, 41: paratype): 36 ‾ 38 — parameral view, 39 ‾ 41 — lateral view. Scale bars 0.1 mm.