317,858 research outputs found
Holotype of <i>Mazus sunhangii</i> D. G. Zhang & T. Deng.
No full textHolotype of Mazus sunhangii D. G. Zhang & T. Deng.</p
The mitochondrial genome of Lamellomphalus manusensis Zhang & Zhang, 2017 (Gastropoda: Neomphalida) from deep-sea hydrothermal vent
No full textWe report the nearly complete mitochondrial genome sequence of Lamellomphalus manusensis Zhang and Zhang 2017, a deep-sea snail inhabiting hydrothermal vent. The mitogenome is 15,990 bp in length, has a base composition of A (35.7%), T (33.5%), C (15.4%) and G (15.4%), and contains 13 protein-coding genes, 2 ribosomal RNA genes, and 22 tRNA genes. Phylogenetic analyses show that the family Peltospiridae is not monophyletic, suggesting that its genera need to be redefined
Mechanisms for surface potential decay on fluorinated epoxy in high voltage DC applications
Get PDFEpoxy resin has been extensively used for decades as an insulation material in high voltage transmission systems. However, this insulation material does suffer from bulk and surface charging when used as insulating spacer, mainly in high voltage DC applications. By applying fluorination treatment, the surface of polymeric insulation is chemically treated and so modifies charge transport characteristics of the material. In doing so, excellent surface properties can be obtained without compromising the bulk characteristics of the polymeric insulation. In this paper, the authors investigate the surface potential decay performance of non-fluorinated and fluorinated epoxy resin samples. The surface decay performance of insulating material is a crucial parameter in dissipating accumulation of surface and bulk charge that can lead to premature breakdown of the insulating material. The epoxy samples were characterised by Energy Dispersive X-Ray (EDX) analysis to determine the changes in chemical composition of the samples before and after fluorination treatment. Surface potential decay measurement using positive corona discharging was then performed, followed by bulk DC conductivity measurement to further explain the mechanisms which govern the surface potential decay. The existence of surface-fluorinated layer on the treated samples had been found to play a major role in dictating the movement of charges away from the surface during the decay process. The influence of fluorination treatment on the decay mechanisms was discussed
Gibberifera clavata Zhang & Li 2004
No full textGibberifera clavata Zhang & Li, 2004 Gibberifera clavata Zhang & Li, 2004: 291. TL: China, Xizang Autonomous Region, Motuo County; TD: NKUM. Specimens examined. 3♂, Motuo County (29.13 ºN, 95.18 ºE), Xizang Autonomous Region, alt. 3300 m, 8 August 2003, leg. Wang X.P. & Xue H.J., genitalia slide nos. ZAH04151 and ZAH04198. Distribution. China (Xizang). Remarks. This species is similar to G. monticola Kuznetzov, but can be distinguished in the male genitalia with saccular angle blunt and vesica without non-deciduous cornuti. In G. monticola the saccular angle is protruded, obtuse-angled and non-deciduous cornuti are present.Published as part of Zhang, Aihuan, 2021, Review of Gibberifera Obraztsov (Lepidoptera: Tortricidae) from China, with description of a new species, pp. 409-416 in Zootaxa 5039 (3) on page 412, DOI: 10.11646/zootaxa.5039.3.5, http://zenodo.org/record/551149
Pholcus triangulatus Zhang & Zhang 2000
No full textPholcus triangulatus Zhang & Zhang, 2000 (Fig. 54) Pholcu s triangulatus Zhang & Zhang 2000: 153, f. 3A–H. Diagnosis. Among its close Pholcus relatives (see the remark of P. alloctospilus), this species is very similar to P. clavimaculatus and P. beijingensis in the shape of the palpal bulb and epigynum, all without appendices of palpal bulb (Fig. 54F) and with an epigynal knob-shaped apophysis (Fig. 54A). It can be distinguished from these two species by chelicerae without a pair of apophyses proximocentrally (Fig. 54E) and by the triangular tip of the procursus (Fig. 54G), also from P. beijingensis by the shorter ventral apophysis of the trochanter and a nearly round uncus (Figs. 54F–G). Redescription. Male (holotype), total length 4.7: cephalothorax 1.6 long, 1.8 wide; abdomen 3.2 long, 1.4 wide. Leg I: 41.7 (10.4+0.9+10.1+17.7+2.7), tibia II: 7.4, tibia III: 4.8, tibia IV: 6.5; tibia I L/D: 63. Prosoma shape as in Fig. 54C. Carapace short, broad and almost circular, ochre, with pair of brown marks broadly connecting to ocular area. Cephalic region raised, with a brown longitudinal stripe and a pair of brown spots centrally, ocular area dark yellow. Clypeus 0.37, slightly ochre, without marks. Distance AME–AME 0.05. Diameter AME 0.09, ALE 0.17, PME 0.14, PLE 0.16. Chelicerae as in Fig. 54E, with pair of black apophyses distally and pair of unsclerotized thumb-shaped apophyses proximolaterally. Labium pale brown. Endites light yellow. Sternum slightly ochre, with some regular brown marks. Femora, patellae and tibiae ochre, with dark rings, metatarsi and tarsi brown. Abdomen cylindrical, pale ochre, dorsum with many brown spots as in Fig. 54C. Venter pale brown, without marks. Palps as in Figs. 54F–G, bulb with nearly round uncus, without appendix, procursus triangular. Variation. Tibia I in 12 male paratypes: 9.3–10.1 (mean 9.8). Body length in 12 male paratypes: 4.4–4.8. Female: in general very similar to male. Total length of bodies 4.5–4.8. A paratype measured (Mt. Baishi), total length 4.7: cephalothorax 1.4 long, 1.5 wide; abdomen 3.3 long, 1.5 wide. Tibia I: 6.1. Distance AME–AME 0.05. Epigynum roughly rounded as in Fig. 54A, with a small knob-shaped apophysis on the median place. Dorsal view as in Fig. 54B, with a rainbow-shaped sclerotized arch anteriorly and a pair of triangular pore plates. Distribution. Known from type locality only. Material examined. CHINA: Hebei: Laiyuan County, Mt. Baishi, July 19, 1999, leg. F. Zhang and J. X. Zhang, male holotype, 12♂, 15♀ paratypes (MHBU); Tang County, Mt. Damao, May 6, 2001, leg. J. X. Zhang, 8♂, 11♀ (MHBU).Published as part of Zhang, Feng & Zhu, Ming-Sheng, 2009, A review of the genus Pholcus (Araneae: Pholcidae) from China, pp. 1-114 in Zootaxa 2037 (1) on pages 93-94, DOI: 10.11646/zootaxa.2235.1.2, http://zenodo.org/record/531760
Cyclocosmia latusicosta Zhu, Zhang & Zhang 2006
No full textCyclocosmia latusicosta Zhu, Zhang & Zhang, 2006 (Îḃflnff) Figures 1A – G, 2A – D, 7A, 8A, 9B – G Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006: 119, figs 4, 5A – D, 6A – J (Holotype female from Guangxi, China, deposited in MHBU, not examined). Material examined. CHINA. 2 females and 1 male, Border area of China and Vietnam (no detail locality), Guangxi Zhuang Autonomous Region, 8 May 2015 (male matured on 29 June 2015) (SWUC); 2 females, the same locality as above, 8 May 2015 (males matured on 10 July 2015) (SWUC). Diagnosis. The anterior spermatheca of the species is nearly quadrate, without protuberance, different from the American species: C. truncata (Gertsch & Platnick 1975: 6, fig. 25), C. torreya (Gertsch & Platnick 1975: 12, fig. 26) and C. loricata (Gertsch & Platnick 1975: 15, fig. 27). Males and females are similar to those of other Asian Cyclocosmia species in having the similar shape of spermatheca (Figs 1F, 2D), especially C. siamensis (Schwendinger 2005: 231, figs 17 – 21), but are distinguished by the upper muscle impression of the opisthosomal disc with a pair of endocentric concavities (Figs 1G, 8A). Description. Female (Figs 1F – G, 2D, 9 B–D, 9F–G). See also Zhu, Zhang & Zhang (2006: 121, figs 4, 5A – D, 6A – J). Abdomen of female yellow-brown, with opisthosomal disc bearing 40–54 ribs. Spermathecae twice as long as wide (L/W=2.27), without protuberance. Male (Figs 1 A–E, 2A–C, 7A, 8A, 9E; described for the first time). Total length (including chelicerae) 19.79 – 21.47; chelicerae 2.32, carapace 9.01 long, 8.41 wide; abdomen 10.14 long, 8.34 wide. Carapace and chelicerae brownish black. Chelicerae short, broad, with spinose rastellum on both paturons. Abdomen with opisthosomal disc, pattern on opisthosomal disc of male similar to that of female, with 48 ribs in total. Eight eyes concentrated on low tubercle. Ocular area 1.03 long; anterior width, 2.24; posterior width, 2.32; ALE: AME: PLE: PME (0.56: 0.37: 0.47: 0.31), ALE – AME 0.27, AME – AME 0.27, PLE – PME 0.14, PME – PME 0.97; MOA 0.96 long, front width 1.01, back width 1.49. Clypeus height 0.96. Maxilla 1.43 long, 1.76 wide. Sternum 5.21 long, 5.31 wide. Legs brown and yellow, longer than female. Leg measurements: I 26.27 (8.62, 2.42, 6.46, 5.85, 2.92); II 22.11 (8.26, 2.11, 4.47, 4.62, 2.65); III 21.75 (6.32, 2.57, 4.51, 5.06, 3.29); IV 28.33 (8.06, 3.92, 5.34, 7.28, 3.73). Leg formula: 4123. Tibia width (2.09: 1.90: 2.26: 2.53). Male pedipalp sclerotized. Embolus long. Copulatory duct smooth, without protuberance. Distribution. China (Guangxi, Yunnan) and Vietnam (Vinh Phuc, Ninh Binh).Published as part of Yu, Kun & Zhang, Zhi-Sheng, 2018, On three species of the trapdoor spider Genus Cyclocosmia from China (Araneae, Halonoproctidae), pp. 248-256 in Zootaxa 4532 (2) on pages 249-250, DOI: 10.11646/zootaxa.4532.2.4, http://zenodo.org/record/261525
Kapsa (Rigida) Cao & Zhang
No full textKey to males of Kapsa (Rigida) Cao & Zhang sgen. n. 1. Anal tube appendage rudimentary, small, not hooked at apex...................... K. apicispina Yang & Zhang sp. nov. - Anal tube appendage well developed, hooked apically (Figs 5 b, 6 b, 8 b, 9 b, 10 e, 11 c, 12 c, 13 c)........................ 2 2. Anal tube appendage curved cephalad in larteral view................................ K. maculata Sohi & Mann, 1992 - Anal tube appendage curved caudad in lateral view (Figs 5 b, 6 b, 8 b, 9 b, 10 e, 11 c, 12 c, 13 c)........................... 3 3. Aedeagus without ventral process near base of shaft (Figs 5 h, 6g, 11 i, 13g)........................................ 4 - Aedeagus with unpaired ventral process near base of shaft (Figs 8 h, 9g, 10 j, 12 i)................................... 7 4. Aedeagal shaft with ventral process near apex (Figs 6 g, 13g)................................................... 5 - Aedeagal shaft without process (Figs 5 h, 11 i)............................................................... 6 5. Paramere forked apically, with apical and basal branch, aedeagal shaft with small thornlike process ventro-apically (Fig. 6 e, g)...................................................................... K. aculeiformis Cao & Zhang sp. nov. - Paramere bifurcated apically, with dorsal and ventral branch, aedeagal shaft with large serrated protrusion ventro-medially (Fig. 13 e, g)................................................................ K. serrata Cao & Zhang sp. nov. 6. Apex of paramere straight, aedeagal shaft expanded in lateral view (Fig. 11 f, i)......... K. imminuta Yang & Zhang sp. nov. - Apex of paramere sinuate, aedeagal shaft not expanded in lateral view (Figs 5 e, f, h).......... K. alba Dworakowska, 1981 7. Ventral process not extended to midlength of aedeagal shaft (Figs 8 h, 9g)......................................... 8 - Ventral process surpassing midlength of aedeagal shaft (Figs 10 j, 12 i)........................................... 10 8. Paramere footlike apically, heel expanded, ventral processes of aedeagus rounded in lateral view (Fig. 9 e, g)...................................................................................... K. explanata Cao & Zhang sp. nov. - Paramere with second extension apically, ventral processes of aedeagus pointed in lateral view (Fig. 8 h, i)............... 9 9. Aedeagal shaft expanded in lateral view, almost straight............................... K. minuta Dworakowska, 1994 - Aedeagal shaft not expanded in lateral view, obviously curved ventrad (Fig. 8 h)........... K. brevis Cao & Zhang sp. nov. 10. Ventral process of aedeagus with broadened and concave apex in caudal view....... K. borealis Dworakowska & Sohi, 1978 - Ventral process of aedeagus pointed apically in caudal view (Figs 10 k, 12 j)....................................... 11 11. Paramere forked apically (Fig. 10 h).............................................. K. furcata Cao & Zhang sp. nov. - Paramere not forked apically (Fig. 12 g)................................................................... 12 12. Aedeagus with base of ventral process broader than that of shaft in lateral view (Fig. 12 i).................................................................................................. K. megaprocessa Cao & Zhang sp. nov. - Aedeagus with base of ventral process slightly narrower than that of shaft in lateral view......................................................................................... K. simlensis Dworakowska, Nagaich & Singh, 1978Published as part of Yang, Meixia, Cao, Yanghui & Zhang, Yalin, 2013, Taxonomic study of the genus Kapsa Dworakowska with a new subgenus, and new combinations and records for Tautoneura Anufriev (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini), pp. 117-142 in Zootaxa 3630 (1) on page 128, DOI: 10.11646/zootaxa.3630.1.4, http://zenodo.org/record/22287
Abrus coneus Dai and Zhang 2002
No full textAbrus coneus Dai and Zhang, 2002 Figs 37–43, 73 Abrus coneus Dai and Zhang, 2002: 311, fig. 6, A–G. Material examined. China: Holotype ɗ, Gansu; Kangxian, Baiyun Mountain, 1250–1750m, 12 July 1998, coll. Chen Jun; Paratype: 1 Ψ, Gansu; Kangxian, Baiyun Mountain, 1250–1750m, 12 July 1998, coll. Chen Jun (IZAS); 1 Ψ(IZAS), Gansu; Kangxian, Qinghe Forest Farm, 1400m, 12 July 1998, coll. Yao Jan. Remarks. This species is very similar to A. bifurcatus Dai and Zhang, but can be distinguished from the latter by: 1) pygophore with long appendage at ventral posterior margin; 2) basal projection of aedeagus about half length of shaft, without lateral appendages at middle. Distribution. China (Gansu).Published as part of Dai, Wu & Zhang, Yalin, 2008, A review of the genus Abrus Dai & Zhang (Hemiptera: Cicadellidae, Deltocephalinae) from China with description of one new species, pp. 37-53 in Zootaxa 1688 on page 46, DOI: 10.5281/zenodo.18058
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