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FIGURE 41. Ventana Dive 3558-D6 in A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae)
No full textFIGURE 41. Ventana Dive 3558-D6 specimen of Cordagalma isocarrei sp. nov. at a depth of 215 m.Published as part of P. R. Pugh, 2016, A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae), pp. 1-64 in Zootaxa 4095 (1) on page 39, DOI: 10.11646/zootaxa.4095.1.1, http://zenodo.org/record/26138
FIGURE 5. Cordagalma ordinatum nectophores from BWP567-15 in A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae)
No full textFIGURE 5. Cordagalma ordinatum nectophores from BWP567-15 specimen. Ostial (A), axial (B), and lateral (C) views. Scale bar 1 mm.Published as part of P. R. Pugh, 2016, A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae), pp. 1-64 in Zootaxa 4095 (1) on page 10, DOI: 10.11646/zootaxa.4095.1.1, http://zenodo.org/record/26138
FIGURE 11. Cordagalma ordinatum. Mature tentillum showing A in A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae)
No full textFIGURE 11. Cordagalma ordinatum. Mature tentillum showing A. large stenotele nematocysts; B. the "rostrum"; and C. Developing tentillum, without rostrum or cnidocils. cn. cnidocil; r. rostrum; st. stenotele. Proximal at bottom. Scale bars 50 µm. A. © Claude Carré; B and C tentilla from BWP1886-19 specimen.Published as part of P. R. Pugh, 2016, A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae), pp. 1-64 in Zootaxa 4095 (1) on page 14, DOI: 10.11646/zootaxa.4095.1.1, http://zenodo.org/record/26138
Cardianecta Pugh, 2016, gen. nov.
No full textGenus <i>Cardianecta</i> gen. nov. <p> Monotypic genus for <i>Cardianecta parchelion</i> <b>sp. nov.</b></p>Published as part of <i>P. R. Pugh, 2016, A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae), pp. 1-64 in Zootaxa 4095 (1)</i> on page 49, DOI: 10.11646/zootaxa.4095.1.1, <a href="http://zenodo.org/record/261389">http://zenodo.org/record/261389</a>
Cordagalma Totton 1932
No full textGenus <i>Cordagalma</i> Totton, 1932. <p> Type species. <i>Cordagalma ordinatum</i> (Haeckel, 1888).</p> <p> <b>Diagnosis.</b> Small colonies that show all the basic characters listed above for the family Cordagalmidae and are particularly distinguished by the presence, on all the tentacles, of tentilla that, as Carré (1968) remarked were devoid of desmonemes and acrophores, characteristically present in the adult terminal filaments of many monoecious physonect siphonophores, such that those of <i>Cordagalma ordinatum</i> have come to be called "tentilles de type larvaire" or larval-type tentilla. The palpons do not have a palpacle.</p>Published as part of <i>P. R. Pugh, 2016, A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae), pp. 1-64 in Zootaxa 4095 (1)</i> on page 7, DOI: 10.11646/zootaxa.4095.1.1, <a href="http://zenodo.org/record/261389">http://zenodo.org/record/261389</a>
Cordagalma tottoni Margulis 1993
No full textCordagalma tottoni Margulis, 1993. Diagnosis. Small, typically heart-shaped nectophores. Pedicular canal, on reaching nectosac, gives rise to only upper and lower radial canals. Lateral canals arise from the upper canal. Remarks. The original description of Cordagalma tottoni was based on fragments of a single specimen collected, using a Juday net in the 100 –0m depth zone, by the Research Vessel Vozrozhedenia on 18 th December 1986 at 35 °S 139 °W, in the middle of the South Pacific Ocean. The material was said to consist of a stem, with pneumatophore and various buds, three nectophores, two gastrozooids, and several siphosomal fragments. The type specimen has been re-examined by the present author. A problem with Margulis' (1993) description of the nectophores is that she had orientated them upside-down, such that she considered the conical lower part of the nectophore to be anterior. This apart, the only real distinguishing feature of the nectophores, the largest of which measured 3.5 mm in height and 2.5 mm in width, was that the pedicular canal, on reaching the nectosac, gave rise to only the upper and lower radial canals (Figure 12). The lateral radial canals then arose from the upper (ventral according to Margulis) canal. This, with some difficulty, was confirmed by the present author and, thus, is in contrast to the arrangement in all other Cordagalma species herein described where all the radial canals arise together from the pedicular canal. It is far from certain that the siphosomal zooids described by Margulis (1993) actually belong to the same specimen as the detached nectophores. Some of the palpons were said to have palpacles (Figure 12) while others did not. This suggests their presence and subsequent loss, which would be in marked contrast to the arrangement in other Cordagalma species, but is in accord with that found for Cardianecta parchelion gen. nov., sp. nov. described below. However, the re-examination showed that the palpons, which were attached at their bases, appeared not to possess palpacles. The loose gastrozooids had the proximal part of the tentacles attached, which bore, presumably, young tentilla with long pedicles and oval cnidobands, with a beak-shaped tip. There was said to be a single row of larger nematocysts on either side of the cnidoband, enclosing numerous smaller ones. No further details could be added. These are quite unlike the tentilla of C. ordinatum that Margulis (1993, Figure 2 E) figured but, again, those of Cardianecta parchelion gen. nov., sp. nov. are very different. The bracts of C. tottoni also were markedly different in having a transverse ridge demarcating a triangular distal facet on the upper side, and with a bracteal canal that was said to end below the middle of a strip of nematocysts running proximally from the distal tip of the bract. Finally, Margulis described the gonophores as being immature but, on re-examination, the sex of some could be determined and they all appeared to be female. It is, however, doubtful that this observation has any significance. Thus, until a complete specimen of Cordagalma tottoni is collected it is impossible to know if the siphosomal zooids described by Margulis (1993) actually belong with the nectophores. Nonetheless, the fact, since confirmed by the present author, that the lateral radial canals on the nectosac arise from the upper canal is a distinguishing feature setting this species apart from all other Cordagalma species. Distribution. Known only from a single specimen collected in superficial waters in the central South Pacific Ocean (c, 35 ° S 139 ° W). Etymology. Named for Arthur Knyvett Totton whose Synopsis of the Siphonophora, published in 1965, remains the most important work on siphonophores published to date.Published as part of P. R. Pugh, 2016, A synopsis of the Family Cordagalmatidae fam. nov. (Cnidaria, Siphonophora, Physonectae), pp. 1-64 in Zootaxa 4095 (1) on pages 16-17, DOI: 10.11646/zootaxa.4095.1.1, http://zenodo.org/record/26138
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
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