1,722,908 research outputs found
Ascopolyporus tibetensis F. M. Yu, Q. Zhao & T. Luangharn
No full text<i>Ascopolyporus tibetensis</i> F.M. Yu, Q. Zhao & T. Luangharn <p> <b>Host:</b> On the living stem of bamboo</p> <p> <b>Distribution:</b> China (Tibet)</p>Published as part of <i>Yu, Feng-Ming, Wei, De-Ping, Zhao, Qi, Tang, Song-Ming & Luangharn, Thatsanee, 2023, Ascopolyporus tibetensis (Cordycipitaceae, Hypocreales): a new species from Tibet, China, pp. 88-98 in Phytotaxa 592 (2)</i> on page 95, DOI: 10.11646/phytotaxa.592.2.2, <a href="http://zenodo.org/record/7840405">http://zenodo.org/record/7840405</a>
Helvella pseudoatra Q. Zhao 2023, sp. nov.
No full text<i>Helvella pseudoatra</i> Q. Zhao, <i>sp. nov.</i> (Fig. 4) <p>Index Fungorum number: IF 552243, Facesoffungi number: FOF 03268</p> <p> Etymology: The specific epithet <i>pseudoatra</i> refers to the morphological similarity of the new species to <i>Helvella atra</i>.</p> <p> Type: China, Yunnan Province, Gongshan County, on the ground, under a forest dominated by <i>Quercus</i>, alt. 1900 m, 29 July 2011, Q. Zhao 1070 (HKAS 74023, <b>holotype</b>).</p> <p> Diagnosis: Similar to <i>Helvella atra</i> but differs in their stipe.</p> <p> <i>Pileus</i> saddle-shaped to slightly irregularly lobed, 1–2.5 cm high, 1–2.5 cm broad, margin merged each other in several places and fused with stipe, <i>hymenium</i> even, brown, dark brown to black when fresh, becoming blackish when dried, <i>receptacle surface</i> pubescent, dark grey to greyish black when fresh, becoming blackish when dried. <i>Stipe</i> 1.3–5 cm long, 0.2–0.5 cm broad, terete, finely pubescent, upward white to brownish, base part white to greyish when fresh, becoming brownish when dried.</p> <p> <i>Medullary excipulum</i> 120–260 µm broad, of <i>textura intricata</i>, hyaline, composed of 2.5–4 µm broad hyphae, walls thickened, J-. <i>Ectal excipulum</i> 40–85 µm broad, of <i>textura angularis</i>, hyaline, terminal cells 15–30 × 8–13 μm, blue in cotton blue, J +. <i>Stipitipellis</i> 90–240 µm, of <i>textura angularis</i>, hyaline, terminal cells 12–30 × 8–18 μm, blue in cotton blue, J +. <i>Asci</i> arising from croziers, 8-spored, subcylindrical to clavate, with apex rounded, 190–235 × 15–20 µm, J- in Melzer’s reagent, blue in cotton blue. <i>Paraphyses</i> filiform, 3–4 µm broad, slightly exceeding the asci, apex enlarged, 4–5 µm broad, hyaline, blue in cotton blue, J-. <i>Ascospores</i> [80/2/2, in H 2 O] 15–19 (–20) × (10.5–) 11–14 μm [Q = 1.26–1.63, Q = 1.39 ± 0.08)], broadly ellipsoid to ellipsoid, smooth-walled under the light microscope.</p> <p> Habitat and known distribution: Scattered or gregarious on the ground, associated with <i>Quercus</i>. Currently only known in southwest China.</p> <p> Other material examined: China, Yunnan Province, Yulong County, on the ground, under a <i>Quercus</i> forest, alt. 2000 m, 20 July 2008, Q. Zhao 8296 (HKAS 54996).</p> <p> Notes: Morphologically, <i>Helvella pseudoatra</i> resembles <i>H. atra</i>, and <i>H. liquii</i> (Skrede <i>et al.</i> 2017). However, the receptacle surface of <i>H. atra</i> is glabrous, and that of <i>H. pseudoatra</i> is pubescent. Additionally, <i>H. atra</i> is blackish with a dark violet brown tinge stipe (Skrede <i>et al.</i> 2017). In contrast, <i>H. liquii</i> exhibits a dark brown to blackish stipe when fresh, while the base part of <i>H. pseudoatra</i> appears white to greyish.</p> <p> Phylogenetically, <i>H. pseudoatra</i> forms a sister group with <i>H. liquii</i> in the fallax-pezizoides lineage (Fig. 1). The pairwise homoplasy index (PHI) value of 1.0, indicates no significant genetic recombination between them and confirms that they are different species (Fig. 2).</p>Published as part of <i>Bao, Shu-Xin, Li, Ying, Zhou, De-Qun, Thongklang, Naritsada, Yu, Feng-Ming & Zhao, Qi, 2023, Two new species of the fallax-pezizoides complex in Helvella (Helvellaceae, Pezizales) from Yunnan, China, pp. 279-289 in Phytotaxa 626 (4)</i> on pages 284-285, DOI: 10.11646/phytotaxa.626.4.5, <a href="http://zenodo.org/record/10212930">http://zenodo.org/record/10212930</a>
Wynnella subalpina Q. Zhao, Zhu L. Yang & K. D. Hyde 2016, sp. nov.
No full textWynnella subalpina Q. Zhao, Zhu L. Yang & K.D. Hyde, sp. nov. Fig. 2 Index Fungorum number: 551515, Facesoffungi number: FoF 01055 Diagnosis:—Rabbit-ear shaped apothecia, with a tea brown to blackish brown hymenium, a red, reddish brown to greyish yellow receptacle surface, and a costate stipe. Paraphyses filiform 3–4 µm broad, and ascospores ellipsoid 19–23 × 10.5–12 μm. Etymology:— subalpina is proposed for its occurrence in subalpine regions in western China. Apothecia rabbit-ear shaped, 3–6 cm high, 1–4 cm broad, hymenium glabrous, tea brown to blackish brown, blackish brown when dry, margin rolled to hymenium when young, expanded at maturity; receptacle surface glabrous, red, reddish brown to greyish yellow, yellowish near the base. Stipe costate, glabrous, 0.5–1.5 × 0.5–2 cm, narrowing to base, light yellow to yellowish. Medullary excipulum 400–490 µm broad, of textura intricata, hyaline, composed of 2.5–5 µm broad hyphae, J-. Ectal excipulum 100–150 µm broad, of textura angularis, pale yellow, lightly encrusted with pale brown crystals, end cells 30–60 × 10–20 μm, J-. Asci arising from croziers, 8-spored, cylindrical to clavate, with apex rounded, 330–390 × 17–23 µm. Paraphyses filiform, 3–4 µm broad, brown, slightly short or exceeding the asci, hyaline in Melzer's reagent, light blue in cotton blue, enlarged apex 4–6 µm broad, J-. Ascospores [60/2/2, in H 2 O] 19–23 × 10.5–12 μm [Q = 1.32–1.58, Q = 1.47 ± 0.06)], ellipsoid, smooth-walled under the light microscope. Odor unique and strong when dried, but not detected when fresh. Habitat and distribution:—Solitary to scattered on the ground or moss, under Picea spp. forest. Only known from high altitude localities in western China. Typification:— CHINA. Tibet, Riwoqe County, on road (highway 317) from Riwoqe to Dingqing, 12 August 2004, Zhu L . Yang 4371 (holotype, HKAS 45750!). Additional material examined:— CHINA. Tibet, Riwoqe County, on road (highway 317) from Riwoqe to Dingqing, 12 August 2004, Zhu L . Yang 4371 (isotype, FH 00301682!), Bomi County, on moss under Picea spp. forest, alt. 3600 m, 16 August 2014, Q . Zhao 2110 (HKAS 78940!); Sichuan Province, Jiuzhaigou County, on the ground, under Picea spp forest, alt. 3000 m, 20 June 2014, Q . Zhao 2050 (HKAS 87730!).Published as part of Zhao, Qi, Brooks, Siraprapa, Zhao, Yong-Chan, Yang, Zhu L. & Hyde, Kevin D., 2016, Morphology and phylogenic position of Wynnella subalpina sp. nov. (Helvellaceae) from western China, pp. 41-48 in Phytotaxa 270 (1) on pages 44-46, DOI: 10.11646/phytotaxa.270.1.4, http://zenodo.org/record/478434
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Phaonia Oxystoma-Group (Diptera, Muscidae): Diagnosis, Key To Identification, Description Of Two New Species And Synonymic Notes
No full textXue, W., Q., Zhao, D, D., Wang, M., R, P. (2009): Phaonia Oxystoma-Group (Diptera, Muscidae): Diagnosis, Key To Identification, Description Of Two New Species And Synonymic Notes. Acta Zoologica Academiae Scientiarum Hungaricae 55 (1): 1-10, DOI: http://doi.org/10.5281/zenodo.573189
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Helvella liquii Q. Zhao 2023, sp. nov.
No full text<i>Helvella liquii</i> Q. Zhao <i>sp. nov.</i> (Fig. 3) <p>Index Fungorum number: IF 552242, Facesoffungi number: FOF 14751</p> <p> Etymology: <i>liquii</i> is named after Li Qui (Li Kui), a historic Chinese hero.</p> <p> Type: China, Yunnan Province, Bingchuan County, on the ground, under a forest dominated by <i>Castanopsis</i>, alt. 1800 m, 13 September 2015, Q. Zhao 2689 (HKAS 90563, <b>holotype</b>).</p> <p> Diagnosis: Similar to <i>Helvella pseudoatra</i> but differs in their stipe color. <i>H. liquii</i> is dark brown to blackish stipe, <i>H. pseudoatra</i> is white to brownish.</p> <p> <i>Pileus</i> saddle-shaped, 1–2.5 cm high, 1–2.5 cm broad, margin merged each other in several places and fused with stipe, <i>hymenium</i> even to slightly rugose, dark brown, grey black to black, <i>receptacle surface</i> glabrous to slightly rugose, coffee blackish when fresh, becoming black when dried. <i>Stipe</i> 3–6 cm long, 0.2–0.5 cm broad, terete, pubescent, yellowish brown, dark brown to blackish when fresh, dark yellowish to black when dried.</p> <p> <i>Medullary excipulum</i> 100–230 µm broad, of <i>textura intricata</i>, hyaline, composed of 3–4 µm broad hyphae, walls thickened, J-. <i>Ectal excipulum</i> 40–80 µm broad, of <i>textura angularis</i>, hyaline, terminal cells 15–34 × 7–13 μm, blue in cotton blue, J +. <i>Stipitipellis</i> 160–290 µm, of <i>textura angularis</i>, hyaline, terminal cells 18–32 × 10–18 μm, blue in cotton blue, J-. <i>Asci</i> arising from croziers, 8-spored, subcylindrical to clavate, with apex rounded, 200–240 × 15–19 µm, J- in Melzer’s reagent, blue in cotton blue. <i>Paraphyses</i> filiform, 3–4 µm broad, slightly exceeding the asci, apex enlarged, 5–9 µm broad, brown, blue in cotton blue, J-. <i>Ascospores</i> [80/2/2, in H 2 O] (15.5–)16–20 (–20.5) × (11.5–)12–14 μm [Q = 1.28–1.56, Q = 1.22 ± 0.03)], broadly ellipsoid to ellipsoid, smooth-walled under the light microscope.</p> <p> Habitat and known distribution: Scattered or gregarious on the ground, associated with <i>Castanopsis</i>.</p> <p> Other material examined: China, Yunnan Province, Puer County, on the ground, under a <i>Castanopsis</i> forest, alt. 1700 m, 6 July, 2012, X.H. Wang 3510 (HKAS 90625).</p> <p> Notes: <i>Helvella liquii</i> shares similar morphology with <i>H. bresadolae</i>, <i>H. fallax</i>, <i>H. pezizoides</i> and <i>H. pseudoatra</i> by their blackish hymenium and terete stipe. However, <i>H. bresadolae</i> (Skrede <i>et al.</i> 2023) has a comparatively shorter stipe (1.5–3.5 cm). <i>Helvella fallax</i> is differentiated by its narrower ascospores 17–19 × 9.8–11 μm (<i>vs</i>. 16–20 × 12–14 μm in <i>H. liquii</i>) and grey to greyish brown stipe (Dissing 1966, as <i>H. atra</i>). <i>Helvella pezizoides</i> can be distinguished by its thicker ectal excipulum of 175–235 µm (<i>vs</i>. 40–80 µm in <i>H. liquii</i>) (Dissing 1966). <i>Helvella liquii</i> has a wider paraphyses apex of 5–9 µm (<i>vs</i>. 4–5 µm in <i>H. pseudoatra</i>), and its stipe is darker than that of <i>H. pseudoatra</i>.</p>Published as part of <i>Bao, Shu-Xin, Li, Ying, Zhou, De-Qun, Thongklang, Naritsada, Yu, Feng-Ming & Zhao, Qi, 2023, Two new species of the fallax-pezizoides complex in Helvella (Helvellaceae, Pezizales) from Yunnan, China, pp. 279-289 in Phytotaxa 626 (4)</i> on pages 283-284, DOI: 10.11646/phytotaxa.626.4.5, <a href="http://zenodo.org/record/10212930">http://zenodo.org/record/10212930</a>
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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