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FIGURE 3 in A new species of Nymphon Fabricius, 1794 (Pycnogonida: Nymphonidae) from northern Spain
No full textFIGURE 3. Nymphon tricuspidatum sp. nov. male holotype. Photograph of male femur with its three cement gland tubes.Published as part of Anna, Soler-Membrives, 2011, A new species of Nymphon Fabricius, 1794 (Pycnogonida: Nymphonidae) from northern Spain, pp. 31-36 in Zootaxa 2798 on page 34, DOI: 10.5281/zenodo.20605
Nymphon tricuspidatum Anna, 2011, n. sp.
No full textNymphon tricuspidatum n. sp. Material examined. Galician Atlantic waters: 1 male, holotype (registration number Pyc 124 DA), 2 males (2 ovigerous and 1 without eggs), 2 gravid females, 4 juveniles, 9 postlarvae, paratypes (Pyc 125 to 128 DA). EBS 600 -03 station. 596–610 m depth. 43 º 48.59 ’N, 8 º 51.45 ’W. Collected by an epibenthic sledge during the DIVA- ARTABRIA cruise. Sand and rock bottoms. 18 / 9 / 2003. Le Danois Bank (El Cachucho, Biscay Bay, NE Atlantic). 1 male without eggs and 1 juvenile, paratypes (Pyc 129 CA). 574 m depth. 44 º05.85’N, 4 º 51.08 ’W. Collected by suprabenthic sledge. Fine sand and mud bottoms. 17 / 10 / 2003. Description of holotype (ovigerous male, ex. Nº 4, DIVA-ARTABRIA cruise). Trunk slender and elongated in outline, glabrous and completely segmented. T- shaped cephalon. Lateral processes separated by equal or more than their own diameter; smooth, without tubercles or setae, slightly longer than broad. Abdomen directed obliquely upwards, bearing only 2 distal setae. Abdomen reaching to half of second coxa from fourth leg. Proboscis rather robust and short—somewhat shorter than scapus—inclined 45 º ventrally, 2 times longer than its diameter. Cylindrical, distally bluntly rounded, with a constriction near to the distal region. Ocular process high and tricuspidate (derivatio nominis), slightly forwardly inclined, situated at the posterior of cephalon, at level of ovigerous implantation. Eyes feebly pigmented, almost transparent. Long and robust cheliphores. Cheliphore implantation laterally with respect to frontal cephalon, forming an angle of 80 º with respect to the proboscis longitudinal edge. Chela slightly longer than scape. Chela fingers longer than palm. Immovable finger of the chela cutting edges bearing 21 major teeth (with a few short setules) and movable finger with 31 teeth. Between the major teeth there are 4–6 smaller denticles. The juvenile specimens have fewer teeth than adults. Palp 5 -articled; 2 nd article the longest, 3 rd and 5 th article about equal in length; distal article only slightly longer than fourth; breadth of two distal articles 0.1 mm, especially setose. Oviger 10 -articled; 5 th article the longest, slightly curved, with a distal apophysis bearing some setae; 4 th article straight, smooth, with a proximal lump. Articles 7–10 (strigilis) with 16 compound spines each with 2–3 pairs of denticles, distributed in the formula 5: 4: 3: 4. Distal claw armed with 6 slender, similar and curved teeth. Legs relatively slender, 5 times as long as trunk. Coxa 2 nearly three times as long as coxa 1 or coxa 3, which are similar in length. Femur slightly less setose than tibia. Setae short and long, the latter longer than the diameter of article. Tibia 1 slightly longer than femur, both straight. Tibia 2 the longest segment, feebly curved. Tarsus slightly shorter than propodus; both segments slender and with spinose ventral margin. Main claw half length of propodus; no auxiliary claws. Males have 2–3 cement gland tubes situated dorso-medially on femur, sparsely distributed, or in pairs close together. Coxa 2 of legs 3 and 4 with ventro-distal round genital process. Body and oviger of females similar to males, except lacking proximal lump of the fourth ovigeral article. Female gonopores located on the second coxae of the four pairs of legs. Remarks. The greenish holotype was bearing a ball with 8 eggs glued to the right oviger. Juveniles studied have a lower number of teeth on the movable and immovable fingers of the chela, and fewer strigilis denticles. Measurements of holotype (mm). Trunk length: 2.4; trunk width: 1.4; abdomen length: 0.6; Proboscis: length: 0.8; width: 0.4; Cheliphore: total length: 2.2; scape: 1.0; chela: 1.2; fingers: 0.9; palm: 0.3; Palp: total length: 2.1; art. 1: 0.1; art. 2: 0.8; art. 3: 0.5; art. 4: 0.3; art. 5: 0.5. Second leg: total length: 12.2; coxa 1: 0.3; coxa 2: 1.0; coxa 3: 0.3; femur: 2.5; tibia 1: 2.8; tibia 2: 3.3; tarsus: 0.7; propodus: 0.9; claw: 0.4. Oviger length: 3.7.Published as part of Anna, Soler-Membrives, 2011, A new species of Nymphon Fabricius, 1794 (Pycnogonida: Nymphonidae) from northern Spain, pp. 31-36 in Zootaxa 2798 on pages 31-34, DOI: 10.5281/zenodo.20605
Exposició "Ictiologia, 4rt de Biologia Ambiental"
No full textEntre el 14 de gener i el 7 de febrer de 2022 s'exhibeixen els treballs finals de dos grups d'alumnes que cursen l'assignatura 'Ictiologia' de 4rt del grau en Biologia Ambiental, impartida per la professora Anna Soler Membrives. A la vitrina horitzontal, l'Enric Ballesteros, la Marta Benet i l'Aina Payola ens expliquen la forma i evolució dels peixos. I a l'aparador vertical, coneixem la família dels peixos lloro (Scaridae) amb els pòsters de la Berta Miralles, en Joan Orozco, la Carla Rubio i la Meritxell Vilella
PYCNOIB: Biodiversity and biogeography of Iberian pycnogonids
No full text<p>Biodiversity and biogeographic studies comparing the distribution patterns of benthic marine organisms across the Iberian Atlantic and Mediterranean waters are scarce. The Pycnogonida (sea spiders) are a clear example of both endemicity and diversity, and are considered a key taxon to study and monitor biogeographic and biodiversity patterns. This is the first review that compiles data about abundance and diversity of Iberian pycnogonids and examines their biogeographic patterns and bathymetric constraints using GIS tools. A total of 17762 pycnogonid records from 343 localities were analyzed and were found to contain 65 species, 21 genera and 12 families. Achelia echinata and Ammothella longipes (family Acheliidae) were the most abundant comprising ~80% of the total records. The Acheliidae is also the most speciose in Iberian waters with 15 species. In contrast, the family Nymphonidae has 7 species but is significantly less abundant (<1% of the total records) than Acheliidae. Species accumulation curves indicate that further sampling would increase the number of Iberian species records. Current sampling effort suggests that the pycnogonid fauna of the Mediterranean region may be richer than that of the Atlantic. The Strait of Gibraltar and the Alboran Sea are recognized as species-rich areas that act as buffer zones between the Atlantic and Mediterranean boundaries. The deep waters surrounding the Iberian Peninsula are poorly surveyed, with only 15% of the sampling sites located below 1000 m. Further deep-water sampling is needed mainly on the Iberian Mediterranean side.</p
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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