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PLATE 1 in A novel species Spinonema gracilispiculum sp. n. (Nematoda: Desmodoridae) from the oxygen minimum zone of Eastern Arabian Sea margin
No full textPLATE 1. Study area showing the type locality of Spinonema gracilispiculum sp. n.Published as part of Jacob, Jini, Rayaroth, Anilkumar Padinjare, Useph, Abdul Jaleel Koovapurath, Philip, Rosamma & Damodaran, Rayaroth, 2020, A novel species Spinonema gracilispiculum sp. n. (Nematoda: Desmodoridae) from the oxygen minimum zone of Eastern Arabian Sea margin, pp. 587-598 in Zootaxa 4869 (4) on page 588, DOI: 10.11646/zootaxa.4869.4.6, http://zenodo.org/record/442323
Spinonema Larrazabal-Filho, Neres, Da Silva & Esteves 2019
No full textGenus Spinonema Larrazábal-Filho, Neres, Da Silva & Esteves, 2019 Diagnosis: Desmodorinae. Body cylindrical with well-developed cephalic capsule and short conical tail. Cuticle thick, with vacuoles extending from head capsule to end of tail. Annuli coarse, extending from head capsule to the beginning of tail, not overlapping with each other. Cuticle with lateral C-shaped alae along anterior portion of body; alae present in both sexes, varying in size according to species. Dorsal spine present in some species; when present, always located in pharyngeal region. Longitudinal rows of indistinct or barely visible somatic setae present in pharyngeal region, absent on remainder of body. Cephalic capsule either smooth or partly to entirely ornamented with small vacuoles. Four cephalic setae located in vicinity of fovea amphidialis; subcephalic setae absent. Fovea amphidialis cryptospiral, spiral or multispiral (may vary from 1.25 to 3 turns). Reproductive system monorchic with single outstretched anterior testis situated to left of intestine. Spicules with capitulum. Velum may be present. Precloacal setae may be present. Female reproductive system didelphic, amphidelphic with reflexed ovaries.Published as part of Jacob, Jini, Rayaroth, Anilkumar Padinjare, Useph, Abdul Jaleel Koovapurath, Philip, Rosamma & Damodaran, Rayaroth, 2020, A novel species Spinonema gracilispiculum sp. n. (Nematoda: Desmodoridae) from the oxygen minimum zone of Eastern Arabian Sea margin, pp. 587-598 in Zootaxa 4869 (4) on page 589, DOI: 10.11646/zootaxa.4869.4.6, http://zenodo.org/record/442323
Spinonema gracilispiculum Jacob & Rayaroth & Useph & Philip & Damodaran 2020, sp.n.
No full textSpinonema gracilispiculum sp.n. Jacob (Table 1; Figures. 1–4; Plate 2) Materials examined: Holotype male and four paratypes, three males and one female, slide No. IO /SS/NEM/00024; deposited at FORV Referral Centre, Centre for Marine Living Resources and Ecology, Cochin, Kerala, India. Type locality: Trivandrum, 08° 27’ 768” N, 76° 23’ 637” E, 216 m collected on 19.05.2007 (FORVSS 254). The sediments consisted of 94% sandy sediments with 1.07% organic matter content, bottom temperature 15.45°C, bottom salinity 35.05, bottom dissolved oxygen concentration 0.35 ml/l. Etymology: The species is named for the slender spicules. Description: Holotype and paratype males (Figure 1–3; Plate 2), Short (1000˗1100 μm) cylindrical body, widest at level of pharyngeal bulb, tapering towards both extremities. Cuticle annulated posterior to head capsule. Coarse body annuli ornamented with a row of vacuoles; interannual spaces distinct (Figure 1D & E; Plate 2E). Ornamentation of body annuli (vacuoles) along anterior third part of body large and distinct but small and less conspicuous further on (Plate 2E). Larger annuli and interannual space in pharyngeal region, 10 annuli in pharyngeal region measure 33.5 µm wheareas 10 annuli further onwards measure 14 µm. The 29th cuticular annule in pharyngeal region bears a single, thornlike 14 μm long cuticularised spine (Figure 1D & 2A) on its dorsal side. Sexual dimor-phism in presence of thorn-like spine and the direction of winding in amphids. Males bears dorsal spine and dorsally wound amphid whereas in females dorsal spine absent and amphids ventrally wound. Wide lateral alae (17˗18 μm) present in mid body, originates 200 µm posterior (Figure.1F) to base of pharyngeal bulb, appears as two raised longitudinal rows of cuticular protrusion with a flat middle groove (‘valley’) in between (Figure 1A & G; Plate 2G & H) resembling the letter ‘C’. Body annuli do not interdigitate at level of lateral alae. Blunt, rounded head. Cephalic capsule smooth in general but ornamentation with small vacuoles are found at posterior edge of main part of head capsule. Head capsule of some specimens wider (21 µm) than long (19 µm) with very fine groove (sutura) in cuticle, separating lip region from main head region (Figure 1B; Plate 2A). Main head region wider than lip region. Lips often folded inwards, sometimes extended. Six outer labial papillae. Four thick, stout cephalic setae located at anterior edge of main part of head capsule (just posterior to sutura between lip region and main part), and at mid-level of fovea amphidialis. Amphids anteriorly placed, anterior edge of amphid touches anterior edge of cephalic capsule (Figure 1B). Cryptospiral fovea amphidialis and apertura amphidialis. Buccal cavity with single dorsal and two ventrolateral teeths and without denticles. Muscular pharynx, pyriform with bipartite terminal end bulb. Cuticle of the lumen thickened (Figure 2A). Reproductive system monorchic with one anterior outstretched testis located on right or left of intestine. Mature sperm cells globular (Figure 1C). Spicules narrow, long and arcuate (75˗80 µm) with short ventral hook-like projection in rounded capitulum; Barely visible velum, originates from base of rounded capitulum. Gubernaculum simple, short and parallel to spicule. There are 6 setiform precloacal papillae. Conical tail with slender spinneret. Non-annulated tail tip vacuolated (Figure 2B; Plate 2I); it makes out 50% of total tail length. Paratype female (Figure. 4): Similar to males except for a ventrally wound amphid and lack of dorsal spine. Reproductive system didelphic, amphidelphic with short reflexed ovaries. Small vulva located posteriorly along the body (V =75%), Vagina vera cuticular and vagina uterina surrounded by constrictor muscle. Some crystalloid structures are observed in ovary (Plate 2J). Juvenile: Juveniles are similar to adults in all respects except for the presence of slender long spines along the mid body. Cuticular spines are also observed along the lateral alae of the genus Desmodorella Cobb, 1933. In Desmodorella, the spines are short, conspicuous and are arranged in two rows. In the present species, they look more like somatic setae appearing only in the mid body region of juveniles and are lost in mature adults. The spines are present throughout the life history of genus Desmodorella. Similar kind of observation was made in the species Spinonema spirale Larrazábal-Filho et al., 2019 while this characteristic is not observed in the other species of Spinonema. Genital primordium consists of a string of cells. Diagnosis: Cuticle annulated with distinct inter annual spaces and vacuoles. Sexual dimorphism in the presence of a strongly cuticularised single, thick, dorsal thornlike spine on the 29th cuticular annuli in the pharyngeal region of males. Wide lateral alae (Figure 1E; Plate 2) on mid body, starting 200 μm posterior to pharyngeal bulb and dis-appearing before reaching the level of cloaca. Posterior edge of cephalic capsule ornamented with small vacuoles, main part of capsule is smooth. Six smaller outer labial papillae in lip region and four cephalic setae at mid-level with unispiral amphid. Buccal cavity with dorsal and a pair of ventrosublateral teeth, no denticles. Muscular pharynx, bipartite. Thickened lumen cuticle. Male reproductive system monorchic with one anterior outstretched testis. Spicules thin, about 3 times as long as corresponding body diameter, arcuate with beak-shaped capitulum and a velum. Gubernaculum simple without apophysis. Short conical tail ornamented with vacuoles. Spinneret short.Published as part of Jacob, Jini, Rayaroth, Anilkumar Padinjare, Useph, Abdul Jaleel Koovapurath, Philip, Rosamma & Damodaran, Rayaroth, 2020, A novel species Spinonema gracilispiculum sp. n. (Nematoda: Desmodoridae) from the oxygen minimum zone of Eastern Arabian Sea margin, pp. 587-598 in Zootaxa 4869 (4) on pages 589-592, DOI: 10.11646/zootaxa.4869.4.6, http://zenodo.org/record/442323
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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