10,683 research outputs found
Coillina Yin & Peng 1998
No full textGenus Coillina Yin & Peng, 1998 Type species by monotypy: Coillina baka Yin & Peng, 1998. Notes. This genus was originally characterized by having the retromargin of the chelicera with teeth separately standing (no keel or lamina), metatarsi of the hind legs without apical preening comb and the embolus of the male palp long and coiled (Yin & Peng 1998). Although only one male specimen of the type species, C. baka, was used as material for establishing this genus, we were able to add the following characteristics on the basis of the newly collected material of both sexes obtained from Myanmar: anterior lateral spinnerets with seven or eight cylindrical spigots, male abdomen with a distinct dorsal scutum, male palpal tibia with a sclerotized dorsal edge but without retrolateral apophysis, male palpal femur with a strong denticle and a peculiarly rounded, thumb-shaped (or mushroom-shaped) apophysis (Figs 11‒12), female genitalia with copulatory openings situated in the anterior part, long and spiraled insemination ducts and small, globular receptacles. In the original diagnosis, Yin & Peng (1998) suggested that Apodrassodes Vellard, 1924, Apophyllus Platnick & Shadab, 1984, and Fedotovia Charitonov, 1946 were similar genera to Coillina. Murphy (2007) put Coillina in the Echemus group, which consists of 26 genera, although its taxonomic status was not specified. In the Echemus group in the sense of Murphy, several species of Synaphosus Platnick & Shadab, 1980 have a filiform or long needleshaped embolus of the male palp (but its distal part does not extend into the alveolus of cymbium as in Coillina) and coiled or spiraled insemination ducts in the female genitalia. Of these, Synaphosus evertsi Ovtsharenko, Levy & Platnick, 1994 known from Ivory Coast, Indonesia (Bali) and Philippines (maybe including artificial distribution) has particularly no retrolateral tibial apophysis on the male palp, in common with C. baka. The relationship between Synaphosus and Coillina should be taxonomically verified.Published as part of Suzuki, Yuya, Aung, Mu Mu & Ono, Hirotsugu, 2021, First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female, pp. 274-280 in Zootaxa 4984 (1) on page 275, DOI: 10.11646/zootaxa.4984.1.20, http://zenodo.org/record/492717
First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female
No full textSuzuki, Yuya, Aung, Mu Mu, Ono, Hirotsugu (2021): First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female. Zootaxa 4984 (1): 274-280, DOI: https://doi.org/10.11646/zootaxa.4984.1.2
FIGURES 14–21 in First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female
No full textFIGURES 14–21. Coillina baka Yin & Peng, 1998 from Chin State, Myanmar (14, 16, 18–19 female; 15, 17, 20–21male). 14–15 Cheliceral furrow with pro- and retromarginal teeth. 16–17 Spigots on anterior lateral spinneret. 18 Epigyne, ventral. 19 Vulva, dorsal. 20 Thumb-shaped apophysis on male palpal femur, ventral. 21 Denticle on male palpal femur, dorsal. Abbreviations. Co—copulatory opening; Fd—fertilization duct; Id—insemination duct; Re—receptacle.Published as part of Suzuki, Yuya, Aung, Mu Mu & Ono, Hirotsugu, 2021, First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female, pp. 274-280 in Zootaxa 4984 (1) on page 279, DOI: 10.11646/zootaxa.4984.1.20, http://zenodo.org/record/492717
Coillina baka Ying & Peng 1998
No full text<i>Coillina baka</i> Yin & Peng, 1998 <p>Tables 1‒4, Figs 1‒21</p> <p> <i>Coillina baka</i> Yin & Peng 1998: 266, figs 17‒25 (holotype male from Baka Village, Menglun Township, 20º30’N, 100º30’E, presumably 600‒700 m elevation, in Mengla County, Xishuangbanna, southwestern Yunnan Province, China, preserved in the Department of Biology, Hunan Normal University, Changsha, not examined).</p> <p> <i>Coillina baka</i>: Song <i>et al</i>. 2004: 44, fig. 22 (redescription of the holotype).</p> <p> <b>Material examined</b>. <b> MYANMAR: <i>Chin State</i>:</b> 1male, 1 female, Mindat District, base of the Natma Taung National Park, Mindat Township, Eastside of Mindat town, 21º19’‒ 21º47N, 93º24’‒ 94º29’E, 1,200‒1,250 m elevation, H. Ono leg. 28.11.2017 (BRC, provisionally preserved in NMNS).</p> <p> <b>Description</b> (based on the specimens from Myanmar): <b>Female</b>. Measurements: Body length 8.07, carapace length 3.56, width 2.62, opisthosoma length 4.36, width 2.49, legs as in Table 1. Size of eyes and their distances: AME 0.20, ALE 0.18, PME 0.18, PLE 0.16, AME‒AME 0.10, AME‒ALE 0.03, PME‒PME 0.09, PME‒PLE 0.16.</p> <p>Carapace yellowish brown, hirsute, longer than wide, with a distinct fovea (Fig. 1), anterior eye row recurved, posterior eye row procurved (Fig. 3). Chelicerae reddish brown, promargin of fang furrow with three teeth and two denticles, retromargin with three teeth (Figs 5, 14), maxillae, labium and sternum yellowish brown, legs yellowish brown without annulations. Leg formula, 4123. Spination of legs as in Table 3. Opisthosoma light grey with anterior dorsum light yellowish brown, without any marking (Fig. 1). Anterior lateral spinnerets with eight cylindrical spigots (Figs 7, 16).</p> <p>Epigyne (Figs 9‒10, 18–19). Epigynal plate longer than wide, lacking scape, with small slit-like copulatory openings located on the anterior part of the genital plate; a sac-like structure (bursa copulatrix?) attached to the entrance of each insemination duct, insemination ducts long and spiraled, occupying most part of vulva; receptacles rather small, globular and sclerotized, situated posteriorly.</p> <p> <b>Male</b>. Measurements: Body length 5.03, carapace length 2.66, width 1.94, opisthosoma length 2.49, width 1.78, legs as in Table 2. Size of eyes and their distances: AME 0.15, ALE 0.12, PME 0.15, PLE 0.13, AME‒AME 0.08, AME‒ALE 0.03, PME‒PME 0.07, PME‒PLE 0.09.</p> <p>The condition and the coloration of prosoma and opisthosoma (Fig. 2), arrangement of eyes (Fig. 4), dentation of chelicera (Figs 6, 15) and leg formula are almost same as those in the female. Spination of legs as in Table 4. There is a slight difference in the number of spines on the leg I between the holotype (Yin & Peng 1998) and the present male. A distinct dorsal scutum present on the abdomen. Anterior lateral spinnerets with seven spigots (Figs 8, 17). Although the number of spigots on posterior lateral spinnerets of the male is not identical with that of the holotype of this species, we regard that the discrepancy does not represent a species difference nor variation because the material is not enough for such decision.</p> <p>Male palp (Figs 11‒13, 20–21): Femur with a rounded, thumb-shaped apophysis ventrally (Figs 11: arrow, 20), a strong denticle (probably a short spine) prolaterally (Figs 12: arrow, 21) and two dorsal spines; tibia short with dorsal edge somewhat sclerotized, but lacking distinct apophysis; retrolateral edge of cymbium sclerotized with a basal projection; palpal bulb lacking median apophysis and conductor, embolic base without apophyses and spines, embolus long and coiled, its distal part filiform and extending into alveolus of cymbium.</p> <p> <b>Distribution</b>. Myanmar (Chin State) and China (Yunnan Province).</p>Published as part of <i>Suzuki, Yuya, Aung, Mu Mu & Ono, Hirotsugu, 2021, First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female, pp. 274-280 in Zootaxa 4984 (1)</i> on pages 275-278, DOI: 10.11646/zootaxa.4984.1.20, <a href="http://zenodo.org/record/4927174">http://zenodo.org/record/4927174</a>
Systematics of Potamanthodes nanchangi Hsu, 1936 (Ephemeroptera: Potamanthidae)
No full textLi, Wen-Juan, Mu, Peng-Xu, Zhou, Chang-Fa (2022): Systematics of Potamanthodes nanchangi Hsu, 1936 (Ephemeroptera: Potamanthidae). Zootaxa 5213 (2): 149-158, DOI: https://doi.org/10.11646/zootaxa.5213.2.
Tm3+ and Nd3+ singly doped LiYF4 single crystals with 3-5 mu m mid-infrared luminescence
No full textMid-infrared (MIR) emissions of 2.4 and 3.5 mu m from Tm3+:LiYF4 single crystals attributed to H-3(4) -> H-3(5) and H-3(5) -> F-3(4) transitions as well as MIR emissions of 4.2, 4.3, and 4.5 mu m from Nd3+: LiYF4 lasers attributed to I-4(15/2) -> I-4(13/2), I-4(13/2) -> I-4(11/2), and I-4(11/2) -> I-4(9/2) transitions, respectively, are observed. LiYF4 single crystals possess high transmittance of over 85% in the 2.5-6 mu m range. The large emission cross-sections of Tm-doped crystals at 2.4 mu m (1.9 x 10(-20) cm(2)) and Nd-doped crystals at 4.2 mu m (0.84 x 10(-20) cm(2)) as well as the high rare-earth doping concentrations, excellent optical transmission, and chemical-physical properties of the resultant samples indicate that Nd3+ and Tm3+ singly doped crystals may be promising materials for application in MIR lasers
Nais longidentata Cui, He, Peng & Wang, 2015, sp. n.
No full text13. <i>Nais longidentata</i> sp. n. <p>(Figures 4, 5; Table 2)</p> <p> <b>Holotype.</b> IHB NMC 20110702a, mature specimen mounted in Canada balsam, and stained with borax carmine.</p> <p> <b>Type locality.</b> ST57, N 30°47'12.6", E 90°58'43.9", Lake Namco of Tibet, ca. 4,716 m asl, lake shore substrate type coarse gravel and sand; water depth 0.3 m, water temperature 10.0°C, dissolved oxygen 7.48 mg/L, pH 10.42, conductivity 1,783 µS/cm. 2 July 2011, collected by X. B. He, Y. D. Cui.</p> <p>2014).</p> <p> <i>N. longidentata N. bretscheri N. communis N. elinguis N. pardalis N. variabilis N. badia</i></p> <p> Species <b>sp. n.</b> Michaelsen, 1899 Piguet, 1906 Müller, 1774 Piguet, 1906 Piguet, 1906 Peng <i>et al.</i>, 2014 Length (mm) 4.3–5.7 3–7 1.8–12 2.2–12 2.5–7.0 3–10 4.2–9.1 <b>Paratypes.</b> IHB NMC 20110702b–e, 4 specimens from the type locality mounted in Canada balsam, and stained with borax carmine.</p> <p> <b>Other material.</b> More than 50 immature specimens from ST5, ST9, ST31, ST53, ST57, preserved in 10% formalin, collected by X. B. He, Y. D. Cui.</p> <p> <b>Etymology.</b> The specific name " <i>longidentata</i> ” is Latin for "with long teeth”, and refers to the needle with two long teeth.</p> <p> <b>Description.</b> Length 3.3–7.4 mm (holotype 4.3 mm), width at VI 0.3–0.6 mm (holotype 0.5 mm), segments 34–41(holotype 34). Prostomium conical. Eyes present, body pigment absent. Pharynx in II–III. Stomach in VII– VIII, dilatation sudden in VII, no elongate cells. Clitellum inconspicuous. Coelomocytes abundant. No swimming.</p> <p>Dorsal chaetae from VI onwards (Fig. 5 F). Hairs (0)1–2 per bundle, 225–450 Μm long, with faint serration (Fig. 5 C). Needles 1–2 per bundle, 92–112 Μm long, with two long parallel teeth (10.0–13.8 Μm long), distal tooth slightly thinner and shorter than proximal, or subequal; nodulus ca. 2/5 from distal end (Fig. 4 D, Fig. 5 D–E). Ventral chaetae of II–V 3–4 per bundle, 78–84 Μm long, distal tooth longer and thinner than proximal, with median or slightly distal nodulus, hardly longer and thinner than the rest. Ventral chaetae from VI 2–5 per bundle, 68–78 Μm long, distal tooth slightly longer than proximal, with 1–3 fine intermediate teeth, nodulus 2/5 from distal end (Fig. 4 A–C; Fig. 5 A–B). Penial chaetae (Fig. 4 E) 3 per bundle, 70–112 Μm long, 4 Μm thick, simple-pointed. Male pores paired in segment VI. Spermathecal pores paired in segment V.</p> <p>Clitellum in V–VI. Male genitalia paired in V–VI. Vasa deferentia (Fig. 4 F, vd) 90–100 Μm long, 8–9 Μm wide, completely surrounded by abundant prostate gland cells (Fig. 4 F, pr), joining the atria subapically. Atrial ampullae large and round, 120 Μm in length, 45 Μm in diameter, wall 5 Μm thick (Fig. 4 F, at). Spermathecal ampulla pear-shaped, 90 Μm long, 50 Μm wide, with distinct duct 60–70 Μm long, 9–10 Μm wide (Fig. 4 F, sp).</p> <p> <b>Distribution.</b> Known only from Lake Nam Co and Lake Yamzho Yumco of Tibet.</p> <p> <b>Remarks.</b> Considering the characters such as the presence of eyes, coelomocytes abundant, dorsal chaetae from VI with hairs and double-pronged needles, ventral chaetae of II–V longer and thinner than the rest, pharynx in II–III, stomach beginning in VII, spermathecae with distinct ducts, vasa deferentia with prostate gland cells joining the atria subapically, atria without prostate glands, penial chaetae present with a simple hook, we think that the new species fits the definition of <i>Nais</i> Müller, 1773 (Sperber 1948; Brinkhurst & Jamieson 1971; Hrabě 1979; Timm 1999; Envall <i>et al.</i> 2012).</p> <p> About 31 species have been described in <i>Nais</i>, and ten species are distributed in China (Sperber 1948; Liang 1964; Brinkhurst & Jamieson 1971; Semernoy 2004; Envall <i>et al.</i> 2012; Peng <i>et al.</i> 2014). <i>N. longidentata</i> <b>sp. n.</b> is distinguished from congeners in having long and parallel needle teeth, faintly serrated hairs, and pectinate ventral chaetae with 1–2 intermediate teeth.</p> <p> Comparing <i>N. longidentata</i> <b>sp. n.</b> with allied species (Table 2), the new species is similar to <i>N. elinguis</i> by the long and parallel needle teeth. However, the needles of the new species are longer than those of <i>N. elinguis</i> (10.0– 13.8 Μm <i>vs</i>. 3.1–4.6 Μm). <i>N. badia</i> Peng <i>et al</i>., 2014 resembles the new species in serrate hairs and pectinate ventral chaetae, but its large area of reddish brown pigment in I–VIII, wave-like body movements, and vasa deferentia with prostate gland cells only on their posterior parts are significantly different from <i>N. longidentata</i> <b>sp. n.</b>. Among further similar species, <i>N. bretscheri</i> Michaelsen, 1899 differs from the new species in giant chaetae in some anterior ventral segments; <i>N. communis</i> Piguet, 1906 differs in the thick prostate gland cells only on their posterior parts; <i>N. variabilis</i> Piguet, 1906 and <i>N. pardalis</i> Piguet, 1906 swim with spiral body movements and their stomach has elongate cells. In all these species the needle teeth are considerably shorter than in <i>N. longidentata</i> <b>sp. n.</b></p>Published as part of <i>Cui, Yongde, He, Xuebao, Peng, Yu & Wang, Hongzhu, 2015, Records of Naididae and Lumbriculidae (Clitellata) from Tibet, China, with description of a new species of Nais, pp. 513-530 in Zootaxa 3956 (4)</i> on pages 521-524, DOI: 10.11646/zootaxa.3956.4.4, <a href="http://zenodo.org/record/240764">http://zenodo.org/record/240764</a>
Comparison between a phenomenological approach and a morphoelasticity approach regarding the displacement of extracellular matrix
No full textPlastic (permanent) deformations were earlier, modeled by a phenomenological model in Peng and Vermolen (Biomech Model Mechanobiol 19(6):2525–2551, 2020). In this manusctipt, we consider a more physics-based formulation that is based on morphoelasticity. We firstly introduce the morphoelasticity approach and investigate the impact of various input variables on the output parameters by sensitivity analysis. A comparison of both model formulations shows that both models give similar computational results. Furthermore, we carry out Monte Carlo simulations of the skin contraction model containing the morphoelasticity approach. Most statistical correlations from the two models are similar, however, the impact of the collagen density on the severeness of contraction is larger for the morphoelasticity model than for the phenomenological model.Numerical Analysi
Liquid-phase-epitaxy-grown InAsxSb1-x/GaAs for room-temperature 8-12 mu m infrared detectors
No full textHigh-quality InAsxSb1-x (0 < x <= 0.3) films are grown on GaAs substrates by liquid phase epitaxy and electrical and optical properties of the films are investigated, revealing that the films exhibit Hall mobilities higher than 2x10(4) cm(2) V-1 s(-1) and cutoff wavelengths longer than 10 mu m at room temperature (RT). Photoconductors are fabricated from the films, and notable photoresponses beyond 8 mu m are observed at RT. In particular, for an InAs0.3Sb0.7 film, a photoresponse of up to 13 mu m with a maximum responsivity of 0.26 V/W is obtained at RT. Hence, the InAsxSb1-x films demonstrate attractive properties suitable for room-temperature, long-wavelength infrared detectors. (c) 2006 American Institute of Physics
Lathrobium liyangense Peng and Li, new species
No full textLathrobium liyangense Peng and Li, new species (Figs 10 A, 11) Type material. HOLOTYPE: ♂, labeled ‘ China: Zhejiang Prov., Qingyuan County, mountain near Liyang, 27 ° 49 ' 38 ''N 119 ° 11 ' 22 ''E, 990–1160 m, 29.IV. 2014, Peng, Song, Yan & Yu leg.’ (SNUC). Paratypes: 1 ♀, same label data as holotype (SNUC). Description. Measurements (in mm) and ratios: BL 6.67–7.06, FL 2.95–3.17, HL 0.85–0.89, HW 0.83–0.88, AnL 1.69–1.76, PL 1.13–1.19, PW 0.94–0.96, EL 0.57–0.61, AL 1.54, HL/HW 1.01–1.02, HW/PW 0.88–0.92, HL/PL 0.75, PL/PW 1.20–1.24, EL/PL 0.50–0.51. Habitus as in Fig. 10 A. Body brown, legs light brown, antennae brown. Head weakly oblong; punctation moderately coarse and sparse, sparser in median dorsal portion; interstices with very shallow microreticulation. Eyes moderately small and composed of approximately 45 ommatidia. Pronotum nearly parallel-sided; punctation weakly defined and sparser than that of head; impunctate midline very broad; interstices without microsculpture. Elytral punctation moderately dense, shallow and ill-defined. Hind wings completely reduced. Protarsi without appreciable sexual dimorphism, distinctly dilated. Abdomen with fine and moderately dense punctation, that of tergite VII distinctly sparser than that of anterior tergites; interstices with very shallow microsculpture; posterior margin of tergite VII without palisade fringe; tergite VIII without sexual dimorphism, posterior margin (Fig. 11 A) weakly convex. Male. Sternites III–VI unmodified; sternite VII (Fig. 11 D) transverse, with truncate posterior margin and without modified setae; sternite VIII (Fig. 11 E) with narrow median impression posteriorly, this impression with numerous modified stout blackish setae, posterior excision V-shaped; aedeagus as in Figs 11 F, G, ventral process very short and stout; dorsal plate long and nearly straight in lateral view; internal sac with two sclerotized spines of different shapes. Female. Sternite VIII as in Fig. 11 B, posterior margin strongly convex; tergite IX (Fig. 11 C) with long anteromedian portion and short postero-lateral processes; tergite X (Fig. 11 C) 0.6 times as long as antero-median portion of tergite IX. Comparative notes. It resembles L. mu sp. n. from Fengyang Shan in Zhejiang in body size, the shape of the male sternite VII, the presence of two long sclerotized spines in the internal sac of the aedeagus, and in the shapes of the female tergites IX–X and sternite VIII. Lathrobium liyangense is distinguished from L. mu by the darker coloration of the body, the oblong head, the shallow posterior excision of the male sternite VIII, the short and stout ventral process of the aedeagus, as well as the weakly convex posterior margin of the female tergite VIII. Distribution and biological notes. The type locality is situated near Liyang to the north of Qingyuan, southern Zhejiang. The specimens were sifted from leaf litter in a pine forest at an altitude between 990 and 1160 m, together with L. immanissimum and L. tangi. Etymology. The specific epithet is derived from Liyang, where the type locality is situated.Published as part of Peng, Zhong, Li, Qi-Li, Shen, Liang & Gu, Fu-Kang, 2015, On the Lathrobium fauna of the Donggong Mountains, eastern China, pp. 245-263 in Zootaxa 3905 (2) on pages 257-258, DOI: 10.11646/zootaxa.3905.2.6, http://zenodo.org/record/24508
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