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FIGURE 6. P. malaysianis n. gen. n in A new marine nematode genus Pseudoplatycoma with a new species from the Sulu Sea and revision of the subfamily Platycominae (Enoplida: Leptosomatidae)
Get PDFFIGURE 6. P. malaysianis n. gen. n. sp. a) Paired preclocal supplements. B) Ocelli-like pigment spots. C) Male copulatory apparatus.Published as part of Chen, Cheng-Ann, 2015, A new marine nematode genus Pseudoplatycoma with a new species from the Sulu Sea and revision of the subfamily Platycominae (Enoplida: Leptosomatidae), pp. 233-244 in Zootaxa 3905 (2) on page 240, DOI: 10.11646/zootaxa.3905.2.5, http://zenodo.org/record/24054
Spatial Distribution Of Tropical Estuarine Nematode Communities In Sarawak, Malaysia (Borneo)
No full textChen, Cheng-Ann, Long, Shabdin Mohd, Rosli, Norliana Mohd (2012): Spatial Distribution Of Tropical Estuarine Nematode Communities In Sarawak, Malaysia (Borneo). Raffles Bulletin of Zoology 60 (1): 173-181, DOI: http://doi.org/10.5281/zenodo.534719
Fig. 2 in Spatial Distribution Of Tropical Estuarine Nematode Communities In Sarawak, Malaysia (Borneo)
No full textFig. 2. Principal component analysis derived from the mean percentage of particle fractions in each study site. PC 1 and 2Published as part of Chen, Cheng-Ann, Long, Shabdin Mohd & Rosli, Norliana Mohd, 2012, Spatial Distribution Of Tropical Estuarine Nematode Communities In Sarawak, Malaysia (Borneo), pp. 173-181 in Raffles Bulletin of Zoology 60 (1) on page 175, DOI: 10.5281/zenodo.534719
Platycominae
No full textSubfamily Platycominae Platonova 1976 Description (from Platonova 1976). Body long, tapering little toward both ends. Some forms with well-developed labial cuticular outgrowths and long cephalic setae. Cervical setae numerous and situated in clusters or transverse rows. Amphids usually large and often sexually dimorphic: amphids significantly larger or more complex in males than in females. Renette cell not developed. Nerve ring situated at approximately mid-length of esophagus. Tail rather short and wide, often pointed at end. Spicules usually small or reduced; gubernaculum highly developed. Additional copulatory armature always present and represented by one to two papillate accessory organs. Postanal papillae with setae may also be present.Published as part of Chen, Cheng-Ann, 2015, A new marine nematode genus Pseudoplatycoma with a new species from the Sulu Sea and revision of the subfamily Platycominae (Enoplida: Leptosomatidae), pp. 233-244 in Zootaxa 3905 (2) on page 234, DOI: 10.11646/zootaxa.3905.2.5, http://zenodo.org/record/24054
Pseudoplatycoma Chen, 2015, n. gen.
No full textGenus Pseudoplatycoma n. gen. Description. Male Body long, diameter uniform except near anterior and posterior ends. Cuticle smooth. Ocelluslike paired pigment spots throughout the body from posterior to the nerve ring to the anterior of the spicule. Labial papillae not clearly observed. Eight cephalic setae. Three stout cervical setae near the posterior of the amphid. Four somatic setae on the left side but absent on the right side. One seta on esophageal region (as well as three stout cervical setae). Virtually no buccal cavity; mouth opening merging into oesophagus. Oesophagus cylindrical; length approximately one sixth of the total body length. Amphids pocket-like. Tail conical. Spicules paired, slightly curved ventrally. Proximal end of spicule bluntly rounded. Distal end of spicule forming a screw-like pattern. Gubernaculum with paired dorsal apophyses, caudally directed. Paired subventral setae present at the cloaca. A small pre-cloacal supplement present. One caudal seta present at the tail region. Six pairs of heavily cuticularized paired tubular supplements. Female. Similar to male except for reproductive structures and larger body which is also longer relative to diameter. Head diameter and amphid smaller than male. First pigment spot further from anterior and nerve ring compared to the male. Vulva near mid body length. Reproductive system didelphic amphidelphic. Tail relatively longer than in male. Diagnosis. The characteristics most distinguishing the new genus from the other genera in subfamily Platycominae are the presence of paired heavily cuticulatized tubular precloacal supplements, spicules bluntly rounded at the proximal end, and ocellus-like paired pigment spots throughout the body from posterior to the nerve ring to the anterior of the spicule. No other genus in the subfamily has these characteristics, together with cupshaped or pocket-like amphids with posterior cervical setae. The genus Platycomopsis Ditlevsen 1926 has cupshaped or pocket-like amphids with posterior cervical setae, but has spicules funnel-shaped at the proximal end and ocelli-like paired pigment spots are absent throughout the body. In the presence of a group of cervical setae situated close together and posterior to the amphids, but not immediately so, Pseudoplatycoma n. gen. closely resembles the genus Platycoma (as defined in Table 2). However, Platycoma has oval or slit-like amphids with posterior cervical setae. Proximally bluntly rounded spicules, together with gubernaculum apophyses which are caudally directed are only reported in the genus Proplatycoma, as is a pre-cloacal supplement followed by six subventral papillae. Proplatycoma has a conical pointed, arrowhead-shaped or branched amphid in males, unlike Pseudoplatycoma n. gen.. Etymology. The genus name refers to the dissimilarity with the genus Platycoma.Published as part of Chen, Cheng-Ann, 2015, A new marine nematode genus Pseudoplatycoma with a new species from the Sulu Sea and revision of the subfamily Platycominae (Enoplida: Leptosomatidae), pp. 233-244 in Zootaxa 3905 (2) on page 234, DOI: 10.11646/zootaxa.3905.2.5, http://zenodo.org/record/24054
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
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