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Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia
No full textMarlow, Joseph, Bell, James J., Shaffer, Megan, Haris, Abdul, Schönberg, Christine Hanna Lydia (2021): Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia. Zootaxa 4996 (1): 1-48, DOI: 10.11646/zootaxa.4996.1.
FIGURE 4 in Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia
No full textFIGURE 4. Cliona orientalis. (A) Field image of sponge; (B) close-up field image of papillae; (C) cross-section of erosion; (D) tylostyles; (E) spirasters.Published as part of Marlow, Joseph, Bell, James J., Shaffer, Megan, Haris, Abdul & Schönberg, Christine Hanna Lydia, 2021, Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia, pp. 1-48 in Zootaxa 4996 (1) on page 9, DOI: 10.11646/zootaxa.4996.1.1, http://zenodo.org/record/507334
Zyzzya de Laubenfels 1936
No full textGenus Zyzzya de Laubenfels, 1936 Diagnosis. Acarnid genus with bioerosion capability, with alpha- or beta-endolithic habit, or as free-living sponges. Endolithic forms small-fistulate. Ectosomal skeleton tangential, choanosomal skeleton largely unordered. Silicate spicules diactine megascleres, as apically microspined tylotes and acanthostrongyles. Latter can have spination in regular arrangement as rings. Microscleres toxae or chelae, if present. Commonly strongly pigmented.Published as part of Marlow, Joseph, Bell, James J., Shaffer, Megan, Haris, Abdul & Schönberg, Christine Hanna Lydia, 2021, Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia, pp. 1-48 in Zootaxa 4996 (1) on page 24, DOI: 10.11646/zootaxa.4996.1.1, http://zenodo.org/record/507334
Cliona Grant 1826
No full textGenus Cliona Grant, 1826 Diagnosis. Clionaid genus with sponges in endolithic-papillate (alpha), endolithic-encrusting (beta), free-living (gamma), fistulate sand-dwelling (delta) and intermediate morphologies. Ability to erode calcareous materials. Megascleres as tylostyles, or modifications.Microscleres spirasterose spicules, amphiasters, raphides or microrhabds, if present. Skeleton with papillar tylostyles in palisade, unordered or as usually weakly defined fibres in choanosome, microscleres scattered or adhering to membranes. Erosion traces largely small-camerate, reaching less than 3 mm in diameter per chamber, but some species with large-camerate to cavernous erosion chambers. Association with Symbiodiniaceae common in sponges with tylostyles and spirasters.Published as part of Marlow, Joseph, Bell, James J., Shaffer, Megan, Haris, Abdul & Schönberg, Christine Hanna Lydia, 2021, Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia, pp. 1-48 in Zootaxa 4996 (1) on page 5, DOI: 10.11646/zootaxa.4996.1.1, http://zenodo.org/record/507334
Cliothosa Topsent 1905
No full textGenus Cliothosa Topsent, 1905 Diagnosis. Clionaid genus with sponges predominantly in endolithic-papillate (alpha) morphology, but exceptionally in other morphologies. With ability to erode calcareous materials. Monaxon megascleres usually as robust tylostyles with round, well-formed, sometimes subterminal tyles, commonly with stepped or truncated modifications of the points. Microscleres spirasterose to amphiasterose forms with spines that commonly have delicately split and recurving tips. Reduced, "nodulous" microscleres may occur. Arrangement of papillar tylostyles in palisade or as bouquets, tyles anchored in sponge tissue, points extending above tissue surface. Choanosomal spicules unordered, also containing typical microscleres. Reduced microscleres restricted to only few body parts. Erosion traces usually large-camerate or even single, cavernous erosion chambers with irregular outline.Published as part of Marlow, Joseph, Bell, James J., Shaffer, Megan, Haris, Abdul & Schönberg, Christine Hanna Lydia, 2021, Bioeroding sponge species from the Wakatobi region of southeast Sulawesi Indonesia, pp. 1-48 in Zootaxa 4996 (1) on page 16, DOI: 10.11646/zootaxa.4996.1.1, http://zenodo.org/record/507334
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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