124,632 research outputs found
Vittaliana Devadatha, Nikita, A. Baghela. & V. V. Sarma 2019, gen. nov.
No full textGenus <i>Vittaliana</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov. <p> TYPE SPECIES. — <i>Vittaliana mangrovei</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, sp. nov.</p> <p>INDEX FUNGORUM NUMBER. — IF556887.</p> <p>FACESOFFUNGI NUMBER. — FoF 04668.</p> <p>ETYMOLOGY. — In honour of Prof. B.P.R Vittal for his contributions to Marine mycology.</p> DESCRIPTION <p>Saprobic on mangrove wood.</p> <i>Sexual morph</i> <p> <b>Ascomata.</b> semi-immersed to erumpent, globose to subglobose, gregarious to solitary, pyriform, coriaceous, dark brown to black, short-ostiolate.</p> <p> <b>Peridium.</b> thick-walled of equal thickness, composed of several layers having an inner stratum of hyaline to light brown, thick-walled cells of textura angularis and an outer stratum of light-brown to dark-brown cells of textura angularis fusing with the host tissues.</p> <p> <b>Hamathecium.</b> comprising of unbranched, cellular, hyaline, septate pseudoparaphyses resembling hyphae, anastomosing above the asci and embedded in a gelatinous matrix.</p> <p> <b>Asci.</b> 8-spored, bitunicate, fissitunicate, cylindrical to clavate, short pedicellate, apically rounded and thickened, lacking an ocular chamber.</p> <p> <b>Ascospores.</b> phragmosporous, distoseptate, uni- to biseriate, partially overlapping, constricted at the 4th septum, lower most cells usually longer than other cells, hyaline when young becoming yellow to golden yellow at maturity, smooth-walled, cylindrical, rounded at the apices, tapering to a more nar - rowly rounded base, lacking mucilaginous sheaths or any ornamentation.</p> <i>Asexual morph</i> <p>Undetermined.</p> NOTES <p> Combined multi-locus phylogenetic analysis indicated that <i>Vittaliana</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov., belongs to Phaeosphaeriaceae and closely related to <i>Italica</i>. This new genus shares with <i>Italica</i> similar ascomata and asci characters but is also distinctly different in having ascospores that are phragmosporous, distoseptate, golden yellow at maturity and by their occurrence in a marine habitat. Whereas <i>Italica</i> is markedly different from it in having a thinwalled peridium, muriform, yellowish-brown ascospores and occurs in terrestrial habitats (Wanasinghe <i>et al.</i> 2018). Hence, we introduce <i>Vittaliana</i> Devadatha, Nikita, A.Baghela & V.V.Sarma as a new genus typified by <i>V. mangrovei</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov., sp. nov., in the family Phaeosphaeriaceae based on morphology and molecular sequence analyses.</p>Published as part of <i>Devadatha, Bandarupalli, Mehta, Nikita, Wanasinghe, Dhanushka N., Baghela, Abhishek & Sarma, V. Venkateswara, 2019, Vittaliana mangrovei Devadatha, Nikita, A. Baghela & V. V. Sarma, gen. nov, sp. nov. (Phaeosphaeriaceae), from mangroves near Pondicherry (India), based on morphology and multigene phylogeny, pp. 117-132 in Cryptogamie, Mycologie 20 (7)</i> on pages 120-124, DOI: 10.5252/cryptogamiemycologie2019v40a7, <a href="http://zenodo.org/record/7825823">http://zenodo.org/record/7825823</a>
FIG. 2 in Vittaliana mangrovei Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov, sp. nov. (Phaeosphaeriaceae), from mangroves near Pondicherry (India), based on morphology and multigene phylogeny
No full textFIG. 2. — Vittaliana mangrovei Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov., sp. nov. (AMH-9953, holotype): A, ascomata on host substrate; B, C, vertical section through ascomata; D, peridium magnified; E, pseudoparaphyses; F, germinating ascospore; G, ostiole showing periphyses; H-K, asci; L-R, ascospores. Scale bars: B, C, 50 µm; D-R, 10 µm.Published as part of Devadatha, Bandarupalli, Mehta, Nikita, Wanasinghe, Dhanushka N., Baghela, Abhishek & Sarma, V. Venkateswara, 2019, Vittaliana mangrovei Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov, sp. nov. (Phaeosphaeriaceae), from mangroves near Pondicherry (India), based on morphology and multigene phylogeny, pp. 117-132 in Cryptogamie, Mycologie 20 (7) on page 126, DOI: 10.5252/cryptogamiemycologie2019v40a7, http://zenodo.org/record/782582
Cryptosphaeria avicenniae , Devadatha & V. V. Sarma 2020, sp. nov.
No full text<i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp. nov. (Figs 5; 6) <p>MYCOBANK. — MB 824296.</p> <p>FACESOFFUNGI NUMBER. — FoF 04596.</p> <p> ETYMOLOGY. — Name referring the host genus, <i>Avicennia</i>.</p> <p>CULTURE CHARACTERISTICS. — Ascospores germinating on seawater agar within 24 hours, germ tubes arising from both sides of the ascospores. Colonies on MEA reaching 40-60 mm diameter after 15 days incubation at room temperature, white to cream, reverse pale yellow to black in middle, cottony, surface undulate, irregular. Culture isolated from single ascospores remained non-sporulating after incubation for one month.</p> <p> MATERIAL EXAMINED. — <b>India</b>, Tamil Nadu, Tiruvarur, Muthupet mangroves, 10.4°N, 79.5°E, on decaying wood of <i>Avicennia marina</i> (Acanthaceae), 24.XII.2016, <i>B. Devadatha</i> (holo-, AMH [AMH- 9952]), ex-type living culture NFCCI-4248.</p> <p>DISTRIBUTION. — India.</p> DESCRIPTION <p> Saprobic on decaying wood of <i>Avicennia marina</i>.</p> <i>Sexual morph</i> <p> <b>Stromata.</b> 0.5-1 cm long as black spots, blackening the wood surface, entostroma prosenchymatous, poorly developed, dorsally limited by a black zone binding the fruiting areas.</p> <p> <b>Ascomata.</b> Immersed, spherical to flattened, numerous, 300- 600 µm high, 200-700 µm diameter (ẍ = 479 × 450 µm, n = 10), regularly spaced, and sometimes deeply buried.</p> <p> <b>Ostiole.</b> 100-350 µm long and 60-160 wide (ẍ = 205 × 120 µm, n = 10), periphysate, not uniformly raised from blackened wood surface, or weakly raised, then wood surface blackened only under the ascomata.</p> <p> <b>Peridium.</b> 35-80 µm (ẍ = 50 µm, n = 10), composed of thin white line under the black hymenium, composed of two layers; a subhymenial layer of hyaline hyphae of textura globosaangularis and outermost layer made up of light brown cells of textura angularis fused with wood elements.</p> <p> <b>Hamathecium.</b> Composed of numerous, hyaline paraphyses, persistent, 1-2 µm wide.</p> <p> <b>Asci.</b> 50-95 × 7-14 µm (ẍ = 64 × 9 µm, n = 30), pedicel 40-70 × 2.5-7 µm (ẍ = 49 × 3.7 µm, n = 30), 8-spored, unitunicate, clavate to spindle shaped, long pedunculated, J- in Lugol’s reagent, persistent.</p> <p> <b>Ascospores.</b> 5-13 × 1.5-3 µm (ẍ = 8 × 2 µm, n = 50), allantoid, light brown, containing oil droplets and limited by a thin epispore, lacking sheath or appendages.</p> <i>Asexual morph</i> <p> <b>Conidiomata.</b> Immersed, sub-globose to globose, 150-450 × 145-250 (ẍ = 242 × 181 µm, n = 6), solitary to aggregated, deeply immersed in a stroma with the ascomata of the sexual stage, pale yellow to light brown.</p> <p> <b>Peridium.</b> 15-25 (ẍ = 21 µm, n = 6) thick, comprising brown, thick-walled textura angularis and pseudoparenchymatous cells merged with the host tissue.</p> <p> <b>Conidiophores.</b> 35-55 × 1-3.5 (ẍ = 45.5 × 2 µm, n = 10), aseptate, straight or curved, hyaline, rarely branched with one conidiogenous cell.</p> <p> <b>Conidiogenous cells.</b> 15-35 × 1-2.5 (ẍ = 26.5 × 1.6 µm, n = 10), cylindrical, mostly straight, discrete or integrated, arising from pseudoparenchymatous cells, hyaline, unicellular, with wide base producing conidia at the apex.</p> <p> <b>Conidia.</b> 20-50 × 0.5-2 (ẍ = 30.6 × 1 µm, n = 20), hyaline, numerous, filiform, straight, curved or hook like, with blunt ends.</p> NOTES <p> <i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp. nov., has a wide, white line under the black hymenium in the ascomata, which is akin to <i>Cr. bathurstensis</i> (synonym of <i>Eutypa bathurstensis</i>). <i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp. nov., and <i>Cr. bathurstensis</i> have similar morphological characteristics with overlapping dimensions of the ascomata (300-585 × 200-700 vs 300-600 × 800 µm) and ascospores (5-13 × 1.5-3 vs 6-12 × 2-2.8 µm). <i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp. nov., has shorter necks and light brown ascospores when compared to <i>Cr. bathurstensis</i> (100-350 µm vs 500 µm). <i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp. nov., has larger asci bearing spore part (50-95 × 7-14 µm), light brown ascospores, and found on <i>Avicennia marina.</i> <i>Cryptosphaeria bathurstensis</i> (K.D.Hyde & Rappaz) Dayarathne & K.D.Hyde, comb. nov., has smaller asci bearing spore part (30-50 × 8-10 µm), olive-brown ascospores and is known on branches of <i>Avicennia</i> sp. located in the upper intertidal region. Unfortunately, the type of <i>Cr. bathurstensis</i> lacks sequence data for a comparison. <i>Halodiatrype avicenniae</i> is obviously distinct from <i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp.nov., in having deeply immersed smaller ascomata in a darkened pseudostroma and larger asci and ascospores. Morphological similarities that <i>Cr. avicenniae</i> Devadatha & V.V.Sarma, sp. nov., has with other <i>Cryptosphaeria</i> species are the widely effuse and poorly developed stromata, spindle-shaped, long-stipitate asci with light brown ascospores.Multigene phylogenetic analyses of combined datasets of ITS+Btub and ITS showed that <i>Cr. avicenniae</i> Devadatha & V.V.Sarma, sp. nov., nested with <i>Cryptosphaeria</i> species. <i>Cryptosphaeria avicenniae</i> Devadatha & V.V.Sarma, sp. nov., showed a sister relationship with <i>Cr. pulmanensis, Cr. ligniota</i> and <i>Cr. subcutanea</i> with moderate statistical support (ITS+Btub = 60% ML, 0.94 PP) (ITS = 60% ML, 0.95 PP) (clade F in Fig. 1, clade N in Fig. 2). Morphologically <i>Cr. avicenniae</i> Devadatha & V.V.Sarma, sp. nov., is distinct from <i>Cr. ligniota</i> and <i>Cr. pulmanensis</i> in having light brown ascospores containing oil droplets whereas <i>Cr. ligniota</i> have pale yellow ascospores and <i>Cr. pulmanensis</i> have brown ascospores and by occurring in a marine habitat. <i>Cryptosphaeria ligniota</i>, <i>Cr. pullmanensis</i> and <i>Cr. subcutanea</i> are specific to their host plants in <i>Salicaceae</i> (<i>Populus</i> and <i>Salix</i> spp.) from terrestrial habitats (Rappaz 1987). Ascospores of <i>Cryptosphaeria</i> species are distinct: <i>Cr. pullmanensis</i> with oblong to reniform, occasionally septate,brown ascospores; <i>Cr.subcutanea</i> allantoid to cylindrical, brown ascospores; <i>Cr. ligniota</i> allantoid, pale yellow ascospores. <i>Cryptosphaeria ligniota</i> and <i>Cr. subcutanea</i> have J+ asci, while the other species discussed in this paper have J- asci. Hence, a new species <i>Cr. avicenniae</i> Devadatha & V.V.Sarma, sp. nov., is introduced based on both morphological and phylogenetic analysis. The asexual morph of <i>Cr. avicenniae</i> Devadatha & V.V.Sarma, sp. nov., is similar to the anamorph reported for <i>Diatrypaceae</i> members, with filiform, hyaline conidia that are straight or curved with blunt ends.</p>Published as part of <i>Dayarathne, Monika C., Wanasinghe, Dhanushka N., Devadatha, B., Abeywickrama, Pranami, G, E. B., Jones, areth, Chomnunti, Putarak, Sarma, V. V., Hyde, Kevin D., Lumyong, Saisamorn, C., Eric H. & Mckenzie, 2020, Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K. D. Hyde, gen. nov., pp. 21-67 in Cryptogamie, Mycologie 20 (3)</i> on pages 34-36, DOI: 10.5252/cryptogamie-mycologie2020v41a3, <a href="http://zenodo.org/record/7815042">http://zenodo.org/record/7815042</a>
Vittaliana mangrovei Devadatha, Nikita, A. Baghela. & V. V. Sarma 2019, sp. nov.
No full text<i>Vittaliana mangrovei</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, sp. nov. <p> TYPUS. — <b>India</b>. Pondicherry, Veerampattinam mangroves, on decaying wood of <i>Avicennia marina</i> (Forsk.) Vierh., (Avicenniaceae), 20. I.2017, <i>B. Devadatha</i> (holo-, AMH [AMH-9953]), ex-type living culture = NFCCI-4251.</p> <p>INDEX FUNGORUM NUMBER. — IF556888.</p> <p>FACESOFFUNGI NUMBER. — FoF 04669.</p> <p>ETYMOLOGY. — Referring to the habitat where the fungus thrives.</p> <p>CULTURE CHARACTERISTICS. — Ascospores germinating on seawater agar within 24 hours, germ tubes arising from terminal ends of the ascospore. Colonies on malt extract agar were slow growing, reaching 2 cm diameter after 25 days of incubation at room temperature; white becoming light brown at maturity; surface convex, undulate, irregular, reverse pale orange in the center and hyaline at margins. Mycelium hyaline 1-4 µm diameter, hyaline, branched, septate, not producing asexual or sexual propagules even after incubation for 3 months at room temperature.</p> DESCRIPTION <p> Saprobic on decaying wood of <i>Avicennia marina</i>.</p> <i>Sexual morph</i> <p> <b>Ascomata.</b> 125-250 µm high, 150-300 µm diam. (ẍ = 166 × 195 µm, n = 10), semi-immersed to erumpent, globose to subglobose, gregarious to solitary, coriaceous, black.</p> <p> <b>Ostiole.</b> 25-60 µm long, 10-20 µm diam. (ẍ = 42.5 × 15 µm, n = 10).</p> <p> <b>Peridium.</b> equal in thickness, 25-50 µm (ẍ = 37 µm, n = 10) wide, comprising several layers, an inner stratum with hyaline to light brown cells of <i>textura angularis</i> and an outer stratum with light brown to dark brown cells of <i>textura angularis</i> fusing with the host tissues.</p> <p> <b>Hamathecium.</b> composed of 1-3 µm (ẍ =1.75 µm, n = 10) wide, septate, unbranched, cellular pseudoparaphyses resembling hyphae embedded in a gelatinous matrix.</p> <p> <b>Asci.</b> 100-160 × 7-15 µm (ẍ = 125 × 10 µm, n = 40), 8-spored, bitunicate, fissitunicate, cylindrical to clavate, short pedicellate, apically rounded and lacking an ocular chamber.</p> <p> <b>Ascospores.</b> 17-25 × 4-7 µm (ẍ = 20 × 6 µm, n = 50), uni-to biseriately arranged, partially overlapping, phragmosporous, 5-6 distoseptate, constricted at the 4th septum, lower most cells longer than other cells, hyaline to light-brown when young, becoming yellow to golden-yellow at maturity, smooth-walled, cylindrical, rounded at the apices, tapering to a more narrowly rounded base, lacking any ornamentation or mucilaginous sheaths.</p> <i>Asexual morph</i> <p>Undetermined.</p> NOTES <p> <i>Vittaliana mangrovei</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov., sp. nov., resembles <i>Phaeosphaeriopsis</i>, particularly <i>P. glaucopunctata</i> (Greville) M.P.S. Câmara, M.E. Palm & A.W. Ramaley, in having globose to subglobose, gregarious ascomata; fissitunicate, cylindrical to clavate, short pedicellate asci; oblong to cylindrical, phragmosporous ascospores. However, the new species is distinct in having a thick-walled peridium in the ascomata, longer asci; ascospores that are distoseptate, distinctly constricted at the 4th septum, lower most cells longer than other cells and lacking any ornamentation or mucilaginous sheaths. Whereas the genus <i>Phaeosphaeriopsis</i> is characterized by immersed to erumpent ascomata that are often surrounded by septate, brown hyphae extending into the host tissues; ascospores that are usually without constriction, apical cells often longer than others, ornamented as echinulate, punctate or verruculose and are surrounded by thin mucilaginous sheaths. The phylogenetic analysis in the present study showed that <i>Vittaliana</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov., is close to the genus <i>Italica</i> (Fig. 1). However, <i>Italica</i> differs from it in having eccentric ascomata, thin peridium, branched pseudoparaphyses in hamathecium, short pedicellate asci that apically have a minute ocular chamber; ascospores that are muriform, widest at the middle, with or without a mucilaginous sheath (Wanasinghe <i>et al.</i> 2018). The new species shares some similarities with <i>Vagicola arundinis</i> Phukhamsakda, Camporesi & K.D. Hyde in having yellowish distoseptate ascospores constricted at the fourth cell (Thambugala <i>et al.</i> 2017). However, <i>Vagicola arundinis</i> is different from it in having narrowly fusiform ascospores tapering towards the ends with (5-) 8-9-septate ascopores while the new species has 5-6 distoseptate, somewhat cylindrical ascospores and lack mucilaginous sheaths. Our phylogenetic analysis also showed that <i>Vagicola</i> is distantly placed from <i>Vittaliana</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov. (Fig. 1). The combined LSU, SSU, TEF1a and ITS phylogeny also showed that <i>Vittaliana mangrovei</i> Devadatha, Nikita, A.Baghela & V.V.Sarma, gen. nov., sp. nov., grouped within the Phaeosphaeriaceae as a monotypic genus (Fig. 1).</p>Published as part of <i>Devadatha, Bandarupalli, Mehta, Nikita, Wanasinghe, Dhanushka N., Baghela, Abhishek & Sarma, V. Venkateswara, 2019, Vittaliana mangrovei Devadatha, Nikita, A. Baghela & V. V. Sarma, gen. nov, sp. nov. (Phaeosphaeriaceae), from mangroves near Pondicherry (India), based on morphology and multigene phylogeny, pp. 117-132 in Cryptogamie, Mycologie 20 (7)</i> on pages 124-125, DOI: 10.5252/cryptogamiemycologie2019v40a7, <a href="http://zenodo.org/record/7825823">http://zenodo.org/record/7825823</a>
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
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
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
FIG. 2 in Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K.D.Hyde, gen. nov.
No full textFIG. 2. — Continuation.Published as part of Dayarathne, Monika C., Wanasinghe, Dhanushka N., Devadatha, B., Abeywickrama, Pranami, G, E. B., Jones, areth, Chomnunti, Putarak, Sarma, V. V., Hyde, Kevin D., Lumyong, Saisamorn, C., Eric H. & Mckenzie, 2020, Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K.D.Hyde, gen. nov., pp. 21-67 in Cryptogamie, Mycologie 20 (3) on page 32, DOI: 10.5252/cryptogamie-mycologie2020v41a3, http://zenodo.org/record/781504
Dr. Edwin Wright Collection: Author Unknown
No full textNotes - The author relates several short stories about his neighbours including Alex McDonell, homesteading and life around Meanook and Athabasca (1 page
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
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