Anotylus varisculptilis, Wang & Zhou & Lü, 2017

Wang, Lin-Fei, Zhou, Hong-Zhang & Lü, Liang, 2017, Revision of the Anotylus sculpturatus group (Coleoptera: Staphylinidae: Oxytelinae) with descriptions of seven new species from China, Zootaxa 4351 (1), pp. 1-79 : 11-15

Anotylus varisculptilis sp. nov.

( Figs. 3 )

Type locality: CHINA, Sichuan, Yajiang County.

Type material examined. Holotye : male, CHINA, Sichuan, Yajiang County Weast, L02, 3505 m, mixed broadleaf-conifer forest, 15–18. VII. 2001. coll. Xiaodong Yu (IZ-CAS) ; Paratypes: CHINA: Yunnan: 3 males, 1 female, Dali Bai Aut, Pref., Jizu Shan, summit plateau, 37 km NE Dali , 25˚58’30’’N, 100˚21’36’’E, 3150 m, mixed forest, sifted from litter, moss & mushrooms, 5. IX. 2009. Leg. M. Schülke [CH09–28] ( MSPC) ; 3 males, 1 female, Dali Bai Aut. Pref., Mǎo Jiao Shan, E pass, 58 km NE Dali , 25˚56’41’’N, 100˚40’05’’E, 2525 m, second. Mixed forest , litter, moss & mushrooms sifted, 4. IX. 2009, leg. M. Schülke [ CH 09–26] ( MSPC) ; 1 male, [C03–19], Dali Bai Nat. Aut. Pref., Diancang Shan, 3 km W Dali old town, creek valley and pine forest at “ Cloud Road ”, right upper csetalift station, 25˚41.1’N, 100˚06.8’E, 2650–2750 m, litter, pine needles, moss (dry and wet), mushrooms, 29. VIII. 2003, leg. M. Schülke ( MSPC) ; 2 females, [C03–19A], Dali Bai Nat. Aut. Pref., Diancang Shan, 3 km W Dali old town, creek valley and pine forest at “ Cloud Road ”, right upper csetalift station, 25˚41.1’N, 100˚06.8’E, 2650–2750 m, litter, pine needles, moss (dry) in ditches, mushrooms, 30. VIII. 2003, leg. M. Schülke ( MSPC) ; 1 male, [C03–19B], Dali Bai Nat. Aut. Pref., Diancang Shan, 3 km W Dali old town, creek valley and pine forest at “ Cloud Road ”, right upper csetalift station, 25˚41.1’N, 100˚06.8’E, 2650–2750 m, litter, pine needles, moss (dry) in ditches, mushrooms, trap, 1. IX. 2003, leg. M. Schülke ( MSPC) ; 1 male, [C03-20], Dali Bai Nat. Aut. Pref., Diancang Shan, 4 km W Dali old town, 25˚41.1’N, 100˚06.7’E, 2900–3000 m, E slope with devastated forest and old pine forest, mushrooms, 31. VIII. 2003, leg. M. Schülke ( MSPC) ; 3 males, 1 female, Dali BVai Aut. Pref., Wuliang Shan, 99 km SW Weishan , 25˚10’ 15.5’’N, 100˚14’ 21.6’’E, 2480 m, scrub with (oak, alder, pine), litter & mushrooms sifted, 14. IX. 2009, Leg. M. Schülke e [ CH 09–51] ( MSPC) ; 4 males, 1 female, Lijiang County, Maoniuping , 3115 m, fir forest on the fungus, 3. VIII. 2000. coll. Hongzhang Zhou (IZ-CAS) ; 10 males, 14 females, Lijiang County, Yulong Snow Mountain Natural Reserve, 2980 m, Pine forest , 3. VIII. 2 0 0 0. coll. Hongzhang Zhou (IZ-CAS) ; 5 males, 5 females, Zhongdian county, Nixi town, 3190 m, Pine forest , 27. VII. 2000. coll. Hongzhang Zhou (IZ-CAS) ; 13 males, 10 females, Zhongdian County, Nixi town, 3190 m, Pine forest on the fungus, 27–29. VII. 2000. coll. Hongzhang Zhou (IZ-CAS) ; 6 males, 7 females, Zhongdian county, Gezan town south, 3080 m, Pine forest , 23–25. VII. 2000. coll. Hongzhang Zhou (IZ-CAS) ; 4 males, 2 females, Lijiang County, Maoniuping , 3115 m, coniferous forest on the fungus, 1. VIII. 2000. coll. Hongzhang Zhou (IZ-CAS) ; 1 male, Lijiang County, Yulong Snow Mountain Natural Reserve, Maoniuping , 3060 m, mixed coniferous broad leaved forest, 1–3. VIII. 2000 (IZ-CAS) ; 1 female, Zhongdian County, Bita Lake West , 3440 m, coniferous forest on the fungus, 1. VIII. 2000 (IZ-CAS) ; 1 male, Jingdong County, Ailao Mountain , Xujiaba Reservoir, leaf litter cover, N. 24˚32.411’ E.101˚01.012’, Alt . 2435 m. Yulingzi Zhou (IZ-CAS); Sichuan: 4 males, 2 females, Yajiang County Weast, L01, 3400 m, mixed broadleaf-conifer forest, 15–18. VII. 2001. coll. Xiaodong Yu & Hongzhang Zhou ( IZ- CAS) ; 4 males, 5 females, Jiulong County North, 3045 m, Cyclobalanopsis forest , 8–14. VII. 2001. coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS).

Description. Body black, shiny; legs, elytra and pronotum dark brown. Forebody pubescent, with punctation and striation varying strongly, from densely punctate and striate to almost smooth on surface, especially so in head and pronotum. Body length [average] male, 4.07 mm; female, 3.69 mm.

Male: Head ( Fig. 3-1C, 3-2A ) slightly broader than pronotum. Disc extremely convex, with dense sculptures to nearly not sculptured; mid-longitudinal sulcus narrow and deep, with deep rounded impression on each side before base. Supra-antennal ridge with margin incrassate and convex. Temples dilated, approximately two times as long as eyes. Clypeus nearly square, about 1/3 of total head length, slightly depressed and coriaceous, with a few punctures; anterior margin weakly rounded and protruded. Epistomal suture with lateral portions straight and parallel, running backward to level of anterior margin of eyes.

Occipital suture slightly curved forward in middle. Antenna filiform, segment IV globular, V–X short and transverse, with ultimate one stilliform. Neck without smooth area.

Pronotum ( Fig. 3-1D, 3-2A ) transverse, broadest at near anterior 1/3, with dense sculptures to slightly sculptured; mid-longitudinal sulcus straight and deep, narrowing to base; two paramedial sulci shallower and broader, and interpolated by obtuse longitudinal carina between mid-longitudinal sulcus and paramedial sulcus; shallow depressions close to lateral margins. Anterior margin nearly straight or broadly emarginate near each anterolateral angle. Anterolateral angles sharply produced. Lateral and posterior margins running continuously, posterior angles rounded but distinguishable. Lateral margin weakly crenate on posterior half or not crenate at all. Scutellum with crest-shaped impression, with median lobe sharply pointed. Elytra densely striate and punctate, not pubescent; lateral margin curved, posterior margins truncate and slightly slant. Abdomen coriaceous, covered with punctures and pubescence. Sternite VII ( Fig. 3-1G, 3-2C ) with posterior margin slightly emarginate and bearing long setae laterally, with two small tubercles in middle, not beyond posterior margin. Sternite VIII ( Fig. 3-1H, 3- 2D ) with posterior margin broadly emarginate and bearing long setae laterally, not produced in middle.

Aedeagus ( Fig. 3-1J–N, 3-3A–C ) with median lobe oval, inflated at base and shortly narrowing to apex; apical orifice large and ventral orifice crescentic; internal sac of median lobe with complicated sclerites. Parameres ( Fig. 3-1O, 3-3D ) closely situated, and twining around median lobe; apex flattened and slightly enlarged, with thick seta at middle of ventral edge of each paramere.

Female. Head ( Fig. 3-1E, 3-2B ) smaller than male, narrower than pronotum; head and pronotum ( Fig. 3-1F, 3- 2B ) densely covered with coarse punctures and striae, not displaying much variation as in male. Temples shorter than eyes. Sternite VII ( Fig. 3-2E ) lateral potion with some long setae and posterior margin slightly emarginate. Sternite VIII ( Fig. 3- 1I, 3-2F ) with posterior margin produced, broadly and obtusely triangular. Spermatheca ( Fig. 3-1P, 3-3E ) bulb-like at base and with apical part clavate and slightly curved.

Distribution. China (Sichuan, Yunnan).

Etymology. The species epithet is from the Latin terms " vari- " (varied) and "sculptilis " (sculptured), to indicate the varied striae on head and pronotum.

Differential diagnosis. This new species is similar to A. sikkimi ( Fauvel, 1905) in appearance, but can be distinguished from the latter by the following characteristics: supra-antennal ridge extremely convex; head and pronotum glabrous with punctures deeper and stronger striae, which are sometimes sparse and not so dense; head with punctures smaller and clypeus depressed. Male sternite VII is slightly emarginate, sternite VIII not produced in the middle. Whereas A. sikkimi Fauvel, 1905 has the head and pronotum glabrous with dense striae, its head punctures are relatively larger, its clypeus convex, sternite VII straight and sternite VIII produced in the middle in male, The new species is also similar to A. inustus ( Gravenhorst, 1806) in the structure of the male genitalia, but it can be distinguished from the latter by the details in aedeagus structures, i.e. its paramere is roundly produced with its ventral edge near the base and without seta on apex; its median lobe and internal sac are with complicated sclerites which differ from each other in the two species. By contrast, A. inustus ( Gravenhorst, 1806) with its paramere has two processes of the ventral edge near the base, and its apex of paramere has a pinch of setae.

Remarks. The males of this new species display very strong variation in the appearance of sculptures on the forebody, especially so on head and pronotum. This kind of variation has no correlation with geographical distribution or special gradients ( Fig. 3–4 ).

Figures

FIGURE 3 - 3. Anotylus varisculptilis sp. nov. A, aedeagus (ventral view); B, median lobe of aedeagus (lateral view); C, aedeagus (dorsal view); D, left paramere (in situ) of aedeagus (lateral view); E, spermatheca. Scales: E = 0.05 mm; rest, 0.2 mm.