8,712 research outputs found
Dianous rufidulus Shuai & Tang 2019, new species
No full text3. Dianous rufidulus Shuai & Tang, new species (Figs. 3, 4, 41–48) Type material. Holotype. China: Zhejiang: ♂, glued on a card with labels as follows: “ China: Zhejiang Province, Lin’an city, East Tianmushan, 9-15. VI.2000, Li-Zhen Li leg. ” “ Holotype / Dianous rufidulus / Shuai & Tang” [red handwritten label] (SHNU). Paratypes. 1♂, same data as for the holotype (SHNU); 1♂ 3♀♀, Longwangshan, 3.X.2003, Hu & Tang leg. (SHNU); 5♂♂ 8♀♀, Lin’an city, East Tianmushan, 1050-1150m, 13. VI.2011, Peng & Zhu leg. (SHNU, cPut). Description. Body black with plumbeous tinge, antennae dark brown except club reddish brown, legs reddish brown except apical two fifth of femora and basal one fifth of tibiae distinctly darken, maxillary palpi reddish brown with segment 1 lighter. Pubescence silvery to brownish, distinct on head and abdomen, nearly invisible on pronotum and median portion of elytra. BL: 4.5–5.3 mm, FL: 2.5–2.8 mm. HW: 1.00– 1.06 mm, PL: 0.77–0.85 mm, PW: 0.72–0.77 mm, EL: 1.07–1.20 mm, EW: 1.01–1.15 mm, SL: 0.88–1.02 mm. Head 0.85–0.99 times as wide as elytra; interocular area with deep longitudinal furrows, median portion as wide as the side portions and convex posteriorly, extending to the level of inner eye margins; punctures round to oval, those at the longitudinal furrows slightly confluent, those of the remaining area well delimited, diameter of punctures much wider than medial ommatidia of eyes; interstices smooth, rarely with few traces of reticulation, narrower than half the diameter of punctures at frons and near inner margin of eyes, interstices at the median portion varied from slightly narrower to slightly wider than diameter of punctures. Antennae relative long, when reflexed, reaching the posterior margin of pronotum. Pronotum 1.04–1.13 times as long as wide; disk uneven with transverse impression near anterior margin, two transverse impressions at about middle and transverse impression near posterior margin; punctures nearly as large as those of head, slightly confluent; interstices smooth, mostly narrower than half the diameter of punctures to narrower than diameter of punctures except few on median portion or near anterior and posterior margins, which may be a little wider than diameter of punctures. Elytra 1.01–1.08 times as long as wide; disk relatively even; punctation strongly confluent, interstices smooth and rugae-like, long rugae at inner half portion direct from suture to midlateral portion. Metasternum with median area impressed, sparsely punctate, diameter of punctures similar to those of head, interstices rather shiny though with shallow reticulation. Legs slender, metatarsomere I slightly shorter than the following three segments combined, metatarsomere IV simple. Abdomen semi-cylindrical with broad, horizontal and densely punctate paratergites, width of paratergites of segment IV as wide as median cross section of metatibia; posterior margin of tergite VII with palisade fringe; punctures variable in size, those on basal half of abdominal tergites III–VII similar to or slightly smaller than punctures of head, those on the remain portions of abdominal tergites III–VII distinctly smaller than ommatidia of eyes, those on tergite VIII about as large as ommatidia of eyes; interstices shallowly reticulated on abdominal tergites III–VII except the basal half to basal third of tergites III–VII which are nearly smooth, interstices varying from as wide as the diameter of punctures to much wider than diameter of punctures. Male. Tergites X (Fig. 43) slightly emarginated in the middle of posterior margin; sternite VII slightly impressed at posteromedian part, posterior margin of the impression slightly emarginated; sternite VIII (Fig. 41) widely emarginated in the middle of posterior margin; sternite IX (Fig. 47) with apicolateral projections long, posterior margin indistinctly serrate. Aedeagus (Figs. 45, 46) slender, apical sclerotized area of median lobe subtriangular with lateral corners strongly prominent, dorsal surface covered with short setae; internal sac with long basal tube; parameres slender, distinctly longer than median lobe, each with 14–18 setae on inner side of apical portion. Female. Tergites X (Fig. 44) narrower than that of male with posterior margin entire; Sternite VIII (Fig. 42) distinctly prominent at middle of posterior margin; valvifer (Fig. 48) acute apically. Distribution. China (Zhejiang). Etymology. The specific name “rufidulus” means red tint. Remarks. The new species belongs to the Dianous ocellatus -complex and in general face it is similar to Dianous rugosipennis Puthz, 2000 from Fujian, Zhejiang and Anhui. The new species is now only known from Longwangshan and East Tianmushan, while D. rugosipennis can be also found from above localities and even from the same rock. The new species can be distinguished from D. rugosipennis by reddish legs (blackish in D. rugosipennis), smaller body size in average and by more prominent lateral corners in apical sclerotized area of aedeagus.Published as part of Shuai, Qi & Tang, Liang, 2019, The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae), pp. 275-295 in Zootaxa 4706 (2) on pages 282-283, DOI: 10.11646/zootaxa.4706.2.4, http://zenodo.org/record/356738
Diochus caudapiscis Shuai, Nozaki & Tang 2021, new species
No full text3. Diochus caudapiscis Shuai, Nozaki & Tang, new species (Figs 3, 23–29) Type material. Holotype. China: Yunnan: ♁, glued on a card with labels as follows: “ China: Yunnan Province, Dehongmang, Yingjiang County, Nabang Town, 24°42’59.10’’N, 97°35’04.54’’E, 356m, mixed leaf litter, sifted, 23.VII.2019, Cheng & Shen leg.” “ Holotype / Diochus caudapiscis / Shuai, Nozaki & Tang” [red handwritten label] (SHNU). Paratypes. 1♁ 2♀♀, same data as for the holotype (SHNU); 1♁ 2♀♀, Dehongmang, Yingjiang County, Tongbiguan Town, 24°36’13.78’’N, 97°39’50.41’’E, 1407m, mixed leaf litter, sifted, 20.VII.2019, Cheng & Shen leg. (SHNU); 1♁, Dehongmang, Yingjiang County, Nabang Town, 24°42’05.46’’N, 97°34’25.18’’E, 369m, mixed leaf litter, sifted, 24.VII.2019, Cheng & Shen leg. (SHNU); 1♀, Dehongmang, Yingjiang County, Taiping Town, Near Mangna Road, 24°37’42.99’’N, 97°45’34’’E, 1471m, mixed leaf litter, sifted, 28.VII.2019, Cheng & Shen leg. (SHNU); 4♀♀, Dehongmang, Yingjiang County, Tongbiguan Town, near Mangna Road, 24°36’59.75’’N, 97°44’30.89’’E, 1550m, mixed leaf litter, sifted, 29.VII.2019, Cheng & Shen leg. (SHNU); 1♁, Lushui County, Liuku, Qingshan Park, 7.VII.2010, Liang Tang leg. (SHNU). Description. Body dark brown with pronotum and portions along posterior margins of abdominal segments lighter, appendages reddish yellow with antennal segments 4–11 slightly darker. Similar to Diochus guizhouensis sp. nov. except for the measurements and sexual characters. BL: 4.8–5.8 mm, FL: 2.7–2.9 mm. HL: 0.68–0.80 mm, HW: 0.57–0.62 mm, EyL: 0.17–0.21 mm, TL: 0.43–0.47 mm, PL: 1.01–1.07 mm, PW: 0.72–0.89 mm, EL: 0.98–1.09 mm, EW: 1.05–1.12 mm, SL: 0.68–0.76 mm. Head 1.28–1.36 times as long as wide; pronotum 1.17–1.23 times as long as wide; elytra 0.88–0.99 times as long as wide. Male. Head with a small round elevation between eyes; sternite VIII (Fig. 28) with posterior margin emarginate at middle, lateral corner produced apicolaterad; sternite IX (Fig. 27) symmetrical, widest near the middle; aedeagus (Figs 23–25) with parameres as long as 1/3 length of the median lobe, internal structures sclerotized, consisting of paired apical sclerites and a long basal plate. Female. Head without a small round elevation between eyes; sternite VIII with posterior margin rounded; spermatheca (Fig. 29) sclerotized, very long, with three bends. Distribution. China (Yunnan). Remarks. The new species is similar to D. guizhouensis sp. nov. in appearance, but can be distinguished from the latter by produced apical angles of male sternite VIII and different morphology of aedeagus and spermatheca. Etymology. The specific name caudapiscis means fish tail, which is derived from the shape of male sternite VIII.Published as part of Shuai, Qi, Nozaki, Tsubasa & Tang, Liang, 2021, Notes on the genus Diochus Erichson, with descriptions of two new species from China (Coleoptera, Staphylinidae), pp. 276-282 in Zootaxa 4908 (2) on pages 280-282, DOI: 10.11646/zootaxa.4908.2.8, http://zenodo.org/record/443844
Stenus aduncus Shuai & Tang & Luo 2020, sp. nov.
No full textStenus aduncus sp. nov. (Figs 6, 27–29) Type material. Hඈඅඈඍඒඉൾ: CHINA: SංർΗඎൺඇ: J, glued on a card with labels as follows: “Jiajinshan, Jintang, 3550–3650 m, 18km E primary coniferous forest, 11–24.vi.2004, R. Fabbri leg.”, “ Holotype / Stenus aduncus / Shuai, Tang & Luo” [red handwritten label] (MSBG). Differential diagnosis. The new species resembles S. platydentatus sp. nov., S. tenuidentatus sp. nov. and S. alpigenus sp. nov. from Yunnan in general habitus but can be distinguished from all of them by apical sclerotized area of the median lobe shorter and expulsion clasps (Fig. 28) less protruded inwards medially. Description. Measurements. BL: 4.2 mm, FL: 2.2 mm. HW: 0.84 mm, PL: 0.65 mm, PW: 0.70 mm, EL: 0.70 mm, EW: 0.87 mm, SL: 0.56 mm. Head 0.96 times as wide as elytra; pronotum 0.92 times as long as wide; elytra 0.81 times as long as wide. Morphology. The species is similar to Stenus mendaensis sp. nov. in most aspects except for the following characters: head with interstices smooth, about 1–1.5 times as wide as diameter of punctures along midline of median convex portion; pronotum with impressions deeper, interstices almost smooth, rarely with traces of microsculpture, actual middle of longitudinal furrow densely punctate, which is similar to remaining portions of pronotum; emargination of hind tarsomeres IV deeper. Male. Mesotibiae and metatibiae each with tooth on inner side of apex; sternite VIII with triangular emargination in middle of posterior margin;sternite IX (Fig. 29) with distinct apicolateral projections, posterior margin serrate. Aedeagus (Figs 27, 28) slender; apical sclerotized area of median lobe relatively short with pointed tip; expulsion clasps strongly sclerotized, weakly protruded inwards medially; copulatory tube broad; parameres much longer than median lobe, swollen in apical parts, each with two groups of setae on apico-internal margins: 14–15 setae in distal and 6–7 setae in basal group. Female. Unknown. Etymology. The specific name is derived from the hook -shaped expulsion clasps of aedeagus; adjective. Distribution. China (Sichuan).Published as part of Shuai, Qi, Tang, Liang & Luo, Yong-Ting, 2020, A review of the Stenus aureolus group of China (Coleoptera: Staphylinidae), pp. 615-627 in Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) (Acta. Ent. Mus. Natl. Pragae) 60 (2) on page 623, DOI: 10.37520/aemnp.2020.043, http://zenodo.org/record/517787
Stenus paratrigonuroides Shuai & Tang & Luo 2020, sp. nov.
No full textStenus paratrigonuroides sp. nov. (Figs 9, 38–41) Type material. Hඈඅඈඍඒඉൾ: CHINA: Yඎඇඇൺඇ: J, glued on a card with labels as follows: “NW Deqen, Baima Xue Shan, 28.20°N, 99.03°E, 4000–4300 m, conif, Rhodod, 16–20.vi.2016, Reuter leg.”, “ Holotype / Stenus paratrigonuroides / Shuai, Tang & Luo” [red handwritten label] (VPSG). Pൺඋൺඍඒඉൾඌ: CHINA: Yඎඇඇൺඇ: 2 JJ 3 ♀♀, same label data as for the holotype (VPSG, SHNU); 1 ♀, Deqin Co., Baima Shan, E-side, pass 12km SE Deqin, 28°23.86′N, 99°59.04′E, 4085 m, small creek valley Rhododendron, Salix, leaf litter, moss, dead wood sifted, 10.vi.2005, M. Schülke leg. (MSBG); 1 ♀, Deqin Co., Baima Shan, pass 15km SE Deqin, 28°22.68′N, 99°00.57′E, 4330 m, meadows, Azalea, Juniperus, leaf litter, grass, moss, sifted, 12.vi.2005, M. Schülke leg. (MSBG); 1 ♀, Deqin Co., Baima Shan, pass 15km SE Deqin, 28°22.68′N, 99°00.57′E, 4330 m, 12.vi.2005, A. Smetana leg. (ASTJ). Differential diagnosis. The new species resembles S. trigonuroides from West China and S. aureolus from the Far East but can be distinguished from both by longer apical sclerotized area of the aedeagal median lobe (Fig. 39) and short hind wings. It also differs from S. aureolus (Fig. 14) in the coiled spermatheca duct (Fig. 41). See also Differential diagnoses of these species. Description. Measurements. BL: 3.8–4.5 mm, FL: 2.0– 2.3 mm. HW: 0.81–0.87 mm, PL: 0.61–0.68 mm, PW: 0.65–0.73 mm, EL: 0.79–0.86 mm, EW: 0.85–0.93 mm, SL: 0.66–0.76 mm. Head 0.91–0.98 times as wide as elytra; pronotum 0.91–0.99 times as long as wide; elytra 0.90–0.97 times as long as wide. Morphology. The species is similar to Stenus mendaensis sp. nov. in most aspects except for the following characters: head with interstices smooth, interstice in middle of midline of median convex portion slightly larger than diameter of punctures; hind wings slightly longer, about half the length of elytra; abdominal tergite VII with apical membranous fringe; abdominal tergites III–VI with interstices smooth. Male. Mesotibiae and metatibiae each with tooth on inner side of apex; sternite VIII with triangular emargination in middle of posterior margin; sternite IX (Fig. 40) with distinct apicolateral projections, posterior margin serrate. Aedeagus (Figs 38, 39) slender; apical sclerotized area of median lobe long and pointed at tip; expulsion clasps slender, strongly sclerotized; copulatory tube long and broad; parameres much longer than median lobe, swollen in apical parts, each with two groups of setae on apico-internal margins: 14–18 setae in distal and 6 setae in basal group. Female. Sternite VIII prominent in middle of posterior margin; spermatheca (Fig. 41) sclerotized with basal porch bilobed, spermatheca duct coiled at first bend, capsule small. Etymology. The species name refers to the striking similarity of this species with S. trigonuroides; the suffix - oides (same for all genders) means ‘resembling’. Distribution. China (Yunnan).Published as part of Shuai, Qi, Tang, Liang & Luo, Yong-Ting, 2020, A review of the Stenus aureolus group of China (Coleoptera: Staphylinidae), pp. 615-627 in Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) (Acta. Ent. Mus. Natl. Pragae) 60 (2) on page 625, DOI: 10.37520/aemnp.2020.043, http://zenodo.org/record/517787
Erratum: First-principles insights into hydrogen trapping in interstitial-vacancy complexes in vanadium carbide (Aug, 10.1039/d2cp02425j, 2022)
No full textCorrection for 'First-principles insights into hydrogen trapping in interstitial-vacancy complexes in vanadium carbide' by Shuai Tang et al., Phys. Chem. Chem. Phys., 2022, DOI: https://doi.org/10.1039/d2cp02425j.</p
The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae)
No full textShuai, Qi, Tang, Liang (2019): The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae). Zootaxa 4706 (2): 275-295, DOI: https://doi.org/10.11646/zootaxa.4706.2.
FIGURES 7–12 in The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae)
No full textFIGURES 7–12. Adult habitus of Dianous. 7, 8 D. rugosipennis 9, 10 D. luteostigmaticus 11, 12 D. aequalis. Scale=1mm.Published as part of Shuai, Qi & Tang, Liang, 2019, The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae), pp. 275-295 in Zootaxa 4706 (2) on page 277, DOI: 10.11646/zootaxa.4706.2.4, http://zenodo.org/record/356738
FIGURE 120 in The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae)
No full textFIGURE 120. Map of collecting localities in Zhejiang ProvincePublished as part of Shuai, Qi & Tang, Liang, 2019, The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae), pp. 275-295 in Zootaxa 4706 (2) on page 294, DOI: 10.11646/zootaxa.4706.2.4, http://zenodo.org/record/356738
FIGURES 13–18 in The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae)
No full textFIGURES 13–18. Adult habitus of Dianous. 13, 14 D. banghaasi banghaasi 15, 16 D. dubiosus 17, 18 D. sp. 1. Scale=1mm.Published as part of Shuai, Qi & Tang, Liang, 2019, The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae), pp. 275-295 in Zootaxa 4706 (2) on page 278, DOI: 10.11646/zootaxa.4706.2.4, http://zenodo.org/record/356738
Eulerian Orientations and Hadamard Codes: A Novel Connection via Counting
No full textWe discover a novel connection between two classical mathematical notions, Eulerian orientations and Hadamard codes by studying the counting problem of Eulerian orientations (#EO) with local constraint functions imposed on vertices. We present two special classes of constraint functions and a chain reaction algorithm, and show that the #EO problem defined by each class alone is polynomial-time solvable by the algorithm. These tractable classes of functions are defined inductively, and quite remarkably the base level of these classes is characterized perfectly by the well-known Hadamard code. Thus, we establish a novel connection between counting Eulerian orientations and coding theory. We also prove a #P-hardness result for the #EO problem when constraint functions from the two tractable classes appear together
- …
