1,721,186 research outputs found
FIGURE 4 in Description of the first Caribbean Oscarellidae (Porifera: Homoscleromorpha)
No full textFIGURE 4. TEM micrographs of Oscarella filipoi sp. nov. A) Detailed view of choanocytes. B) Detailed view of endopinacocytes. C) Detailed view of vacuolar cell. D) Detailed view of some of the few prokaryote morphotypes found in O. filipoi. Cho: Choanocyte; end: Endopinacocyte; vc: part of a vacuolar cell.Published as part of Perez, Thierry & Ruiz, Cesar, 2018, Description of the first Caribbean Oscarellidae (Porifera: Homoscleromorpha), pp. 501-514 in Zootaxa 4369 (4) on page 507, DOI: 10.11646/zootaxa.4369.4.3, http://zenodo.org/record/113641
Oscarella Vosmaer 1884
No full textGenus Oscarella Vosmaer, 1884 Type species: Halisarca lobularis Schmidt, 1862 (by monotypy). (Oscaria) Vosmaer, 1881: 163 (preocc. by Oscaria Gray, 1873 —Reptilia); Oscarella Vosmaer, 1884: pl. 8 (explanation); 1887: 326 (nom. nov. for Oscaria Vosmaer). Octavella Tuzet and Paris, 1963: 88. Diagnosis: Homoscleromorphorida without skeleton, with a variable development of the ectosome. The aquiferous system has a sylleibid-like organization, with spherical to ovoid eurypylous or diplodal choanocyte chambers arranged around large exhalant canals (Muricy & Diaz 2002).Published as part of Perez, Thierry & Ruiz, Cesar, 2018, Description of the first Caribbean Oscarellidae (Porifera: Homoscleromorpha), pp. 501-514 in Zootaxa 4369 (4) on page 504, DOI: 10.11646/zootaxa.4369.4.3, http://zenodo.org/record/113641
FIGURE 1 in New Skeleton-Less Homoscleromorphs (Porifera, Homoscleromorpha) From The Caribbean Sea: Exceptions To Rules Are Definitely Common In Sponge Taxonomy
No full textFIGURE 1. Current distribution and sampling sites of the three new Homoscleromopha. Black star Aspiculortis garifuna gen. nov. sp. nov.; grey star Aspiculophora papillata sp. nov.; white star Oscarella minka sp. nov. a. Grotte Zeb; b. Grotte Fer à Cheval c. Grotte aux barracudas; d. Grotte Cathédrale. e. Full moon Cave.Published as part of Ruiz, Cesar, Ereskovsky, Alexander & Perez, Thierry, 2022, New Skeleton-Less Homoscleromorphs (Porifera, Homoscleromorpha) From The Caribbean Sea: Exceptions To Rules Are Definitely Common In Sponge Taxonomy, pp. 128-148 in Zootaxa 5200 (2) on page 130, DOI: 10.11646/zootaxa.5200.2.2, http://zenodo.org/record/725679
Aspiculophora Ruiz 2017
No full textGenus Aspiculophora Ruiz et al. 2017 Diagnosis: Plakinidae without spicules, well-developed mesohyl with a collagen layer between ecto- and choanosome, with or without sub-ectosomal cavities. Leuconoid aquiferous system and aphodal choanocyte chambers. High abundance of prokaryotic symbionts.Published as part of Ruiz, Cesar, Ereskovsky, Alexander & Perez, Thierry, 2022, New Skeleton-Less Homoscleromorphs (Porifera, Homoscleromorpha) From The Caribbean Sea: Exceptions To Rules Are Definitely Common In Sponge Taxonomy, pp. 128-148 in Zootaxa 5200 (2) on page 134, DOI: 10.11646/zootaxa.5200.2.2, http://zenodo.org/record/725679
Plakina Schulze 1880
No full textGenus Plakina Schulze, 1880 Type species: Plakina monolopha Schulze, 1880. Definition: Encrusting Plakinidae with spicules diods, triods and calthrops (though all may be absent), and always with at least one type of homolophose calthrop, which may have one to four lophate actines and different ramification patterns. Irregular spicules are common and intraspecific variation in spicule shape may be high. One species is skeleton-less (Ruiz et al. 2017).Published as part of Grenier, Marie, Ruiz, Cesar, Lage, Anaira & Perez, Thierry, 2020, New cave-dwelling Plakina (Plakinidae, Homoscleromorpha, Porifera) from Martinique Island (French Antilles), pp. 92-104 in Zootaxa 4729 (1) on page 94, DOI: 10.11646/zootaxa.4729.1.6, http://zenodo.org/record/362904
Oscarella Vosmaer 1884
No full textGenus Oscarella Vosmaer, 1884 Diagnosis: Homosclerophorida without skeleton, with a variable development of the ectosome with a collagen layer between ecto- and choanosome. The aquiferous system has a sylleibid-like or leuconoid organization, with spherical to ovoid eurypilous or diplodal choanocyte chambers arranged around large exhalants canals (Muricy & Díaz 2002). Mitochondrial genomes that have been sequenced so far encode a gene absent in other animal mitochondrial genomes: tatC (Ereskovsky et al. 2017).Published as part of Ruiz, Cesar, Ereskovsky, Alexander & Perez, Thierry, 2022, New Skeleton-Less Homoscleromorphs (Porifera, Homoscleromorpha) From The Caribbean Sea: Exceptions To Rules Are Definitely Common In Sponge Taxonomy, pp. 128-148 in Zootaxa 5200 (2) on page 138, DOI: 10.11646/zootaxa.5200.2.2, http://zenodo.org/record/725679
Aspiculortis Ruiz & Ereskovsky & Perez 2022, gen. nov.
No full textAspiculortis gen. nov. Diagnosis: Plakinidae without spicules. Smooth pseudo-criblate surface covered by numerous ostia diverging soon under the epidermal surface in various inhalant canals. A network of superficial translucent much larger exhalant canals leading to prominent oscula. Well-developed mesohyl with several layers of vacuolar cells in the ectosome. No sub-ectosomal cavities. Leuconoid aquiferous system with diplodal choanocyte chambers. High abundance of prokaryotic symbionts in the mesohyl.Published as part of Ruiz, Cesar, Ereskovsky, Alexander & Perez, Thierry, 2022, New Skeleton-Less Homoscleromorphs (Porifera, Homoscleromorpha) From The Caribbean Sea: Exceptions To Rules Are Definitely Common In Sponge Taxonomy, pp. 128-148 in Zootaxa 5200 (2) on page 132, DOI: 10.11646/zootaxa.5200.2.2, http://zenodo.org/record/725679
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
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