1,354,124 research outputs found
Murichromolaenicola thailandensis Htet, Mapook & K. D. Hyde 2023, sp. nov.
No full text<i>Murichromolaenicola thailandensis</i> Htet, Mapook & K.D. Hyde, <i>sp. nov.</i> (Fig. 2) <p>MycoBank MB 849500</p> <p>Facesoffungi FOF 14609</p> <p> <b>Etymology:—</b> Named after the country where the specimen is collected, Thailand.</p> <p> <b>Holotype:—</b> MLFU 23-0324</p> <p> <b>Description:—</b> <i>Saprobic</i> on dead stems of <i>Chromolaena odorata</i>. <b>Sexual morph</b>: Undetermined. <b>Asexual morph</b>: <i>Conidiomata</i> 130–150 × 140–160 µm (<i>x̅</i> = 140 × 155 µm, n = 5), pycnidial, solitary, immersed, unilocular, globose to subglobose, black, ostiole opening through host surface, with small papillate. <i>Peridium</i> 15–25 µm wide, comprised of two to three layers of yellowish-brown cells arranged in <i>textura angularis</i>. <i>Conidiophores</i> reduced to conidiogenous cells. <i>Conidiogenous cells</i> 3–5 × 3–5 µm (<i>x̅</i> =4 × 3.5 µm, n = 5), enteroblastic, phialidic, hyaline, globose to subglobose. <i>Conidia</i> 10–20 × 5–10 µm (<i>x̅</i> =16 × 8, n = 20), yellowish brown to dark brown, oblong or oval to obovoid, round at both ends, 3–5 transverse with 1–2 longitudinal septa, not constricted at the septa, with a gelatinous cap observed clearly when mounted in Indian ink.</p> <p> <b>Culture characteristics:—</b> Conidia germinating on PDA, reaching 25 mm diam within 7 days at room temperature, circular, entire, concentric, flat, opaque, grey on the surface; concentric, pale brown in middle and white at the margin of the reverse surface.</p> <p> <b>Material examined:—</b> Thailand, Chiang Rai Province, Theong District, on the dead stems of <i>Chromolaena odorata</i> (Asteraceae), 24 Jan. 2022, A. Mapook, TCR12 (<b>hototype</b> MLFU 23 -0324; ex-type culture MFLUCC 23 - 0172).</p> <p> <b>Notes:—</b> In the blast search of NCBI, the closest match to the ITS and <i>tef1-α</i> sequences of <i>Murichromolaenicola thailandensis</i> (MFLUCC 23-0172) is <i>M. chromolaenae</i> (MFLUCC 17-1489) with 99.21% (NR_168850) and 98.90% (MN998164) similarities, respectively. The closest match to the LSU sequence was <i>Neostagonosporella sichuanensis</i> (isolates SAUFP201604001, MH368079), with 98.86% similarity. The closest match for the SSU sequence was <i>Parastagonospora nodurum</i> (CBS 185.57, KY090706), with 99.71% similarity. The closest match for <i>rpb2</i> was <i>Wojnowicia italica</i> (MFLU 14-0732, KX430004), with 90.43% similarity. In the present phylogenetic analyses, our strain clusters with <i>M. chromolaenae</i> (MFLUCC 17-1489) with 99% ML bootstrap support. Based on the morphological comparison, <i>M. thailandensis</i> resembles <i>M. chromolaenae</i> (MFLUCC 17-1489) by its immersed conidiomata, yellowish brown to brown cells of <i>textura angularis</i> and yellowish brown to brown ascospores with transverse and longitudinal septa. However, our strain differs from <i>M. chromolaenae</i> in having comparatively smaller conidiomata (130–150 × 140–160 µm vs 200–235 × 195–230 µm) and smaller conidia with a gelatinous cap (10–20 × 5–10 µm vs 14–25× 6.5–11 µm). Furthermore, the conidia of <i>M. chromolaenae</i> have ellipsoid to broadly fusiform, 5–7 transverse septa with polar appendages from both ends, while our strain has oblong or oval to obovoid conidia, rounded at both ends, 3–5 transverse septa and a gelatinous cap at one end. Moreover, <i>M. thailandensis</i> and <i>M. chromolaenae</i> differ in their culture characteristics on malt extract agar (MEA). <i>Murichromolaenicola chromolaenae</i> has crateriform, undulate, white cultures with greyish center at the surface and reverse colony from olivaceous center to creamy-white at the margin, while <i>M. thailandensis</i> has circular, entire, concentric, flat, opaque, grey at the surface and wrinkled, pale brown at the reverse surface. In addition, the nucleotide comparison of the ITS gene region of our strain and <i>M. chromolaenae</i> reveals 1.56% (8/512) nucleotide differences. Therefore, we introduced our strain as a new species, based on phylogeny and morphological comparison, in accordance with Chethana <i>et al.</i> (2021).</p>Published as part of <i>Htet, Zin Hnin, Tibpromma, Saowaluck, Mapook, Ausana, Chethana, K. W. Thilini & Hyde, Kevin D., 2023, Murichromolaenicola thailandensis sp. nov. (Phaeosphaeriaceae, Dothideomycetes) from Chromolaena odorata (Asteraceae) in northern Thailand, pp. 120-132 in Phytotaxa 618 (2)</i> on pages 126-127, DOI: 10.11646/phytotaxa.618.2.2, <a href="http://zenodo.org/record/8406630">http://zenodo.org/record/8406630</a>
Molecular phylogeny and diversity of Laburnicola (Didymosphaeriaceae): a new species from Uzbekistan
No full textHtet, Zin Hnin, Mapook, Ausana, Gafforov, Yusufjon, Chethana, K.W. Thilini, Lumyong, Saisamorn, Hyde, Kevin D. (2021): Molecular phylogeny and diversity of Laburnicola (Didymosphaeriaceae): a new species from Uzbekistan. Phytotaxa 527 (3): 177-190, DOI: 10.11646/phytotaxa.527.3.
A new species and a new host record of Pseudoberkleasmium (Pseudoberkleasmiaceae, Dothideomycetes) from Cocos nucifera and Zea mays in northern Thailand
No full textTian, Xingguo, Tibpromma, Saowaluck, Karunarathna, Samantha C., Dai, Dongqin, Lu, Yongzhong, Mapook, Ausana, Jayawardena, Ruvishika S. (2022): A new species and a new host record of Pseudoberkleasmium (Pseudoberkleasmiaceae, Dothideomycetes) from Cocos nucifera and Zea mays in northern Thailand. Phytotaxa 547 (3): 232-242, DOI: 10.11646/phytotaxa.547.3.
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Laburnicola zaaminensis Htet, Gafforov, Mapook & K. D. Hyde 2021, sp. nov.
No full text<i>Laburnicola zaaminensis</i> Htet, Gafforov, Mapook & K.D. Hyde, <i>sp. nov.</i> (Fig. 2) <p>Mycobank No: MB840713</p> <p>Facesoffungi number: FOF 09516</p> <p> <b>Etymology:—</b> Named after the location that the specimens collected, Zaamin National Park, Uzbekistan.</p> <p> <b>Holotype:—</b> TASM 6152</p> <p> <b>Description:—</b> <i>Saprobic</i> on dead stems of <i>Rosa</i> sp. <b>Sexual morph:</b> Undetermined. <b>Asexual morph:</b> Coelomycetous, <i>Conidiomata</i> 120–230 × 135–140 µm (<i>x</i> = 124 ×138 µm, n=5), superficial, solitary, globose, unilocular, no ostiole, appear as black tiny spots on host. <i>Peridium</i> 16–20 µm wide, comprised of several layered of blackish to dark brown cells of <i>textura angularis,</i> cells towards inside lighter and darker at the outer part. <i>Conidiophores</i> reduced to conidiogenous cells. <i>Conidiogenous cells</i> 3–4 × 4–5 µm (<i>x</i> = 3.5 ×4 µm, n=5), holoblastic, ellipsoidal to ovoid, swollen at the base, hyaline, discrete, producing a single conidium at the apex. <i>Conidia</i> 3–5 × 1–3 µm (<i>x</i> = 4 × 2 µm, n=20), oblong to cylindrical, hyaline, aseptate.</p> <p> <b>Material examined:—</b> Uzbekistan, Jizzakh Province, Zaamin District, Turkestan range of Pamir – Alay Mountains, Zaamin National Park, Ettisuv River, on dead stems of <i>Rosa</i> sp., 10 July 2019, Y. Gafforov YG-Z30-1 (<b>holotype,</b> TASM 6152).</p> <p> <b>Notes:—</b> Our phylogenetic analysis showed that <i>L. zaaminensis</i> strain TASM 6152 is closely related to <i>L. dactylidis</i> with high bootstrap support (ML=90%, BI=1.00) (Fig. 1). However, <i>Laburnicola zaaminensis</i> is an asexual taxon, while <i>L. dactylidis</i> was documented as a sexual morph in Wanasinghe <i>et al</i>. (2016). There are no reports on the asexual morph of <i>L. dactylidis</i> yet. Hence, we could not compare the morphology of our new taxon with <i>L. dactylidis</i>.</p> <p> According to the BLASTn results, the closest match for the LSU sequence of <i>L. zaaminensis</i> was <i>L. muriformis</i> (MFLUCC 14-0921) with 98.96% similarity. The closest match for SSU sequence was <i>Paraconiothyrium rosae</i> (MFLU 15-1115) with 98.49%. The closest match for ITS sequence was <i>Laburnicola</i> sp. (TU32) with 94.95% similarity, and the closest match for <i>TEF</i> 1-ɑ with 93.26% similarity was <i>L. rhizohalophila</i> (strain R22-15). Furthermore, comparisons of the ITS gene region between <i>L. zaaminensis</i> and <i>L. dactylidis</i> shows nine basepair differences (1.9%) across 464 nucleotides and the LSU gene region shows three basepair differences (0.35%) across 854 nucleotides.</p> <p> <i>Laburnicola zaaminensis</i> is distinct from <i>L. rhizohalophila</i> in having small, oblong to cylindrical, hyaline, aseptate conidia (3–5 × 1–3 µm), while <i>L. rhizohalophila</i> has 0-1 transverse septa, hyaline to dark pigmented, peanutlike thalloconidia (20.4–35.4 × 5.2–10.1 µm). Based on the evidence of our phylogenetic analysis and contrasting morphology with the related taxon, <i>Laburnicola zaaminensis</i> is introduced herein as a new species. <i>Laburnicola rhizohalophila</i> (Yuan <i>et al</i>. 2020) is the first asexual morph in the genus, and this is the first coelomycete reported in the genus.</p>Published as part of <i>Htet, Zin Hnin, Mapook, Ausana, Gafforov, Yusufjon, Chethana, K. W. Thilini, Lumyong, Saisamorn & Hyde, Kevin D., 2021, Molecular phylogeny and diversity of Laburnicola (Didymosphaeriaceae): a new species from Uzbekistan, pp. 177-190 in Phytotaxa 527 (3)</i> on pages 182-184, DOI: 10.11646/phytotaxa.527.3.2, <a href="http://zenodo.org/record/5751343">http://zenodo.org/record/5751343</a>
Confusion surrounding Didymosphaeria-phylogenetic and morphological evidence suggest Didymosphaeriaceae is not a distinct family
No full textAriyawansa, Hiran A., Camporesi, Erio, Thambugala, Kasun M., Mapook, Ausana, Kang, Ji- Chuan, Alias, Siti A., Chukeatirote, Ekachai, Thines, Marco, Hyde, Kevin D. (2014): Confusion surrounding Didymosphaeria-phylogenetic and morphological evidence suggest Didymosphaeriaceae is not a distinct family. Phytotaxa 176 (1): 102-119, DOI: 10.11646/phytotaxa.176.1.12, URL: http://dx.doi.org/10.11646/phytotaxa.176.1.1
Variations on the Author
No full text“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
FIGURE 3 in Molecular phylogeny and diversity of Laburnicola (Didymosphaeriaceae): a new species from Uzbekistan
No full textFIGURE 3. Distribution map of Laburnicola speciesPublished as part of Htet, Zin Hnin, Mapook, Ausana, Gafforov, Yusufjon, Chethana, K.W. Thilini, Lumyong, Saisamorn & Hyde, Kevin D., 2021, Molecular phylogeny and diversity of Laburnicola (Didymosphaeriaceae): a new species from Uzbekistan, pp. 177-190 in Phytotaxa 527 (3) on page 185, DOI: 10.11646/phytotaxa.527.3.2, http://zenodo.org/record/575134
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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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