1,720,969 research outputs found
Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
No full textCourville, Erwan, Mooi, Rich, Poulin, Elie, Saucede, Thomas (2023): Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America. Zootaxa 5336 (4): 555-566, DOI: 10.11646/zootaxa.5336.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5336.4.
FIGURE 2. Relationships among some Arbaciidae. A in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
No full textFIGURE 2. Relationships among some Arbaciidae. A, BI (Bayesian Inference) tree of COI sequences; B, BI tree of 28S sequences. Values under each node respectively correspond to BI posterior probabilities below 1.Published as part of <i>Courville, Erwan, Poulin, Elie, Saucede, Thomas, Mooi, Rich, Lessios, Harilaos, Salinas, Andrea Martínez & Diaz, Angie, 2023, Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia, pp. 249-261 in Zootaxa 5375 (2)</i> on page 253, DOI: 10.11646/zootaxa.5375.2.6, <a href="http://zenodo.org/record/10184302">http://zenodo.org/record/10184302</a>
FIGURE 1. A–B in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
No full textFIGURE 1. A–B, Tetrapygus niger; C–D, Arbacia spatuligera; E–F, Arbacia dufresnii; G, Distribution of studied Arbaciidae and sampling sites. Scale bar equals 10 mm.Published as part of <i>Courville, Erwan, Poulin, Elie, Saucede, Thomas, Mooi, Rich, Lessios, Harilaos, Salinas, Andrea Martínez & Diaz, Angie, 2023, Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia, pp. 249-261 in Zootaxa 5375 (2)</i> on page 251, DOI: 10.11646/zootaxa.5375.2.6, <a href="http://zenodo.org/record/10184302">http://zenodo.org/record/10184302</a>
Calymne relicta Thomson 1877
No full text<i>CALYMNE RELICTA</i> THOMSON, 1877 <p> <i>Calymne relicta</i> – Thomson, 1877: 397, figs 102–103; Agassiz, 1881: 155–157, pls XXXIV, XXXIX 24–26, XL 63–65, XLIII 24, XLIV 47, 48; Lovén, 1883: 90; Mortensen, 1907: 53–54, 86, text-fig. 7, pls X 5, 6, 30; Clark, 1917: 125; Clark, 1925: 188; Mortensen, 1950: 127–131; Mooi & David, 1996: figs 9p, 12k; Smith, 2004: 146–149, text-fig. 7.</p> <p> <i>Diagnosis</i></p> <p>As for the genus.</p>Published as part of <i>Saucede, Thomas, Mironov, Alexander N., Mooi, Rich & David, Bruno, 2009, The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida), pp. 630-648 in Zoological Journal of the Linnean Society 155 (3)</i> on pages 632-633, DOI: 10.1111/j.1096-3642.2008.00461.x, <a href="http://zenodo.org/record/5445061">http://zenodo.org/record/5445061</a>
Calymne THOMSON 1877
No full textGENUS CALYMNE THOMSON, 1877 Diagnosis Test of adults very high, ovoid in aboral view, and compressed laterally with low ambitus; anterior end rounded without frontal groove; posterior end almost vertically truncated. Large spoon-shaped spines present on plastronal area; frills of large paddleshaped spines around periproct and aborally on the posterior end; subanal tuft of large pointed spines. Other significant features are important in identification of the genus but are present in other holasteroids and therefore not diagnostic for Calymne alone. These are as follows. Orthosternous plastron with small labrum in contact with sternal plate; interambulacra 1 and 4 meridoplacous, interambulacra 2 and 3 amphiplacous in adults; anterior and posterior pairs of genital plates separated by pair of ocular plates; two gonopores on genital plates 2 and 3. Uniporous ambulacra. Peristome flush with test; periproct supramarginal, located at top of posterior face. Marginal orthofasciole crossing plates 5.a.4 and 5.b.5. Rostrate pedicellariae of three types; ophicephalous pedicellariae umbrella-shaped; triphyllous pedicellariae present; tridentate and globiferous pedicellariae absent. Genotype and only known species: Calymne relicta.Published as part of Saucede, Thomas, Mironov, Alexander N., Mooi, Rich & David, Bruno, 2009, The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida), pp. 630-648 in Zoological Journal of the Linnean Society 155 (3) on page 632, DOI: 10.1111/j.1096-3642.2008.00461.x, http://zenodo.org/record/544506
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Get PDFWe 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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