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Promesacanthus eppleri n. gen., n. sp., a mesacanthid (Acanthodii, Acanthodiformes) from the Lower Devonian of northern Canada
No full textHanke, Gavin F. (2008): Promesacanthus eppleri n. gen., n. sp., a mesacanthid (Acanthodii, Acanthodiformes) from the Lower Devonian of northern Canada. Geodiversitas 30 (2): 287-302, DOI: http://doi.org/10.5281/zenodo.537857
FIG. 2. — Promesacanthus eppleri n. gen., n in Promesacanthus eppleri n. gen., n. sp., a mesacanthid (Acanthodii, Acanthodiformes) from the Lower Devonian of northern Canada
No full textFIG. 2. — Promesacanthus eppleri n. gen., n. sp.: A, photograph of the entire body of the holotype (UALVP 41860); B, camera lucida drawing of the same specimen with interpretation of structures. Scale bars: 1 cm.Published as part of Hanke, Gavin F., 2008, Promesacanthus eppleri n. gen., n. sp., a mesacanthid (Acanthodii, Acanthodiformes) from the Lower Devonian of northern Canada, pp. 287-302 in Geodiversitas 30 (2) on page 292, DOI: 10.5281/zenodo.537857
FIG. 6 in Redescription of the acanthodian Gladiobranchus probaton Bernacsek & Dineley, 1977, and comments on diplacanthid relationships
No full textFIG. 6. — Photographs of articulated specimens of Gladiobranchus probaton Bernacsek & Dineley, 1977: A, portions of the head and branchial chamber (UALVP 42095); B, head and pectoral girdle (UALVP 41862). Scale bars: 1 cm.Published as part of Hanke, Gavin F. & Davis, Samuel P., 2008, Redescription of the acanthodian Gladiobranchus probaton Bernacsek & Dineley, 1977, and comments on diplacanthid relationships, pp. 303-330 in Geodiversitas 30 (2) on page 312, DOI: 10.5281/zenodo.537305
FIG. 8 in Redescription of the acanthodian Gladiobranchus probaton Bernacsek & Dineley, 1977, and comments on diplacanthid relationships
No full textFIG. 8. — Camera lucida drawings: A, ornamented surface of the spathiform opercular plates of Uraniacanthus spinosus Miles, 1973 (BNMH P.16612); B, right scapulocoracoid of Gladiobranchus probaton Bernacsek & Dineley, 1977 (UALVP 41862) after Davis (2002: figs 2.3.2b, 5.3a). Scale bars: A, 1 cm; B, 0.25 cm.Published as part of Hanke, Gavin F. & Davis, Samuel P., 2008, Redescription of the acanthodian Gladiobranchus probaton Bernacsek & Dineley, 1977, and comments on diplacanthid relationships, pp. 303-330 in Geodiversitas 30 (2) on page 314, DOI: 10.5281/zenodo.537305
FIG. 6 in A re-examination of Lupopsyrus pygmaeus Bernacsek & Dineley, 1977 (Pisces, Acanthodii)
No full textFIG. 6. — Lupopsyrus pygmaeus Bernacsek & Dineley, 1977: A, patch of typical body scales; B, detail of a scale in basal view; C, detail of body scale with a broken tip showing the pulp cavity; D, single body scale in oblique, crown view; E, detail of a body scute with crown intact; F, detail of a body scute with a broken crown showing the large, central pulp cavity; G, drawing of a body scale in sagittal section. A-C, G, UALVP 43409; D-F, UALVP 42530. Abbreviations: see Material and methods. Scale bars: A, 0.5 mm; B-G, 100 µm.Published as part of Hanke, Gavin F. & Davis, Samuel P., 2012, A re-examination of Lupopsyrus pygmaeus Bernacsek & Dineley, 1977 (Pisces, Acanthodii), pp. 469-487 in Geodiversitas 34 (3) on page 481, DOI: 10.5252/g2012n3a1, http://zenodo.org/record/538152
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
Karatajūtė-Talimaa, 1968, with an anal fin spine
No full textFIG. 4. — Polymerolepis whitei Karatajūtė-Talimaa, 1968 (all from UALVP 45015): A, scales at the base of the anal fin spine; B, scales mid-way along the leading edge of the anal fin web; C, scales in side view from near the distal tip of the anal fin web; D, scales midway along the leading edge of the hypochordal lobe of the caudal fin; E, scales from the tip of the hypochordal lobe of the caudal fin; F, scales from the base of the hypochordal lobe of the caudal fin. Scale bars: 4 mm.Published as part of Hanke, Gavin F., Wilson, Mark V. H. & Saurette, Fernand J., 2013, Partial articulated specimen of the Early Devonian putative chondrichthyan Polymerolepis whitei Karatajūtė-Talimaa, 1968, with an anal fin spine, pp. 529-543 in Geodiversitas 35 (3) on page 537, DOI: 10.5252/g2013n3a2, http://zenodo.org/record/453812
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
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