1,720,963 research outputs found
Dichogaster Beddard 1889
No full textGenus Dichogaster Beddard, 1889 Subgenus Diplothecodrilus Csuzdi, 1996Published as part of Csuzdi, Cs., Sherlock, E., Kouete, M. Talla & Doherty-Bone, T. M., 2015, Four new earthworm species from the highlands of Cameroon with description of a new genus Okudrilus gen. n. (Oligochaeta: Eudrilidae & Acanthodrilidae), pp. 25-38 in African Invertebrates 56 (1) on page 34, DOI: 10.5733/afin.056.0103, http://zenodo.org/record/767041
Parascolex rosae
No full textParascolex rosae (Michaelsen, 1891) Paradrilus rosae Michaelsen, 1891: 26; Rosa 1891: 389; Michaelsen 1897: 48. Parascolex rosae: Michaelsen 1900: 408; 1903: 166; Sims 1987: 387. Material examined: CAMEROON: South-West Region, Nyasoso and adjacent forest, Mount Kupe, 868–2064m, unknown datum, S. Echalle (NHM 2013.445 - 446 2 preadult fragment), Ndikiniméki, Central Region, 797 m, 20.xi.2008, T. Doherty-Bone (NHM 2013.447 1 ex.). Remarks: Parascolex rosae is one of the largest eudrilid species, measuring up to 470mm. It is quite common in Western Cameroon reported from Barombi, Buea, Kita, Moundamé (Mundame), Victoria (Limbe), and also from Bioko, Equatorial Guinea (Michaelsen 1900, 1903; Rosa 1891).Published as part of Csuzdi, Cs., Sherlock, E., Kouete, M. Talla & Doherty-Bone, T. M., 2015, Four new earthworm species from the highlands of Cameroon with description of a new genus Okudrilus gen. n. (Oligochaeta: Eudrilidae & Acanthodrilidae), pp. 25-38 in African Invertebrates 56 (1) on pages 33-34, DOI: 10.5733/afin.056.0103, http://zenodo.org/record/767041
Eminoscolex franzi Zicsi & Csuzdi 1986
No full textEminoscolex franzi Zicsi & Csuzdi 1986 stat. n. Figs 2–4 Eminoscolex steindachneri Cognetti, 1909; Sims 1971: 531. Eminoscolex steindachneri franzi Zicsi & Csuzdi, 1986: 198. Material examined: CAMEROON: North-West Region, Hills above Lake Bambili 2280 m, leg. M. T. Kouete & T. Doherty-Bone, 24.v.2012 (NHM 2013.438 1 ex., HNHM AF/5572 2 ex.), North-West Region, Oku, below Tolon Falls, 1675 m, leg. T. Doherty-Bone, 19.v.2012 (NHM 2013.439 1 ex.), North-West Region, Lake Awing, 2082 m, leg. M. T. Kouete & T. Doherty-Bone, 23.v.2012 (NHM 2013.440 1 ex.). Remarks: Eminoscolex steindachneri franzi was described by Zicsi and Csuzdi (1986) from the Republic of Congo (Sibiti, Brazzaville and Kindamba). It was thought to be similar to E. steindachneri Cognetti, 1909 from Cameroon (no closer locality given). However, an examination of the ovospertmathecal system of steindachneri and franzi shows clearly that they belong to different species (Figs 2, 3). Another difference is in the structure of the sperm reservoir, which is simple moniliform in steindachneri and highly undulated in franzi (Fig. 4). Habitats where these specimens were collected were in areas disturbed by cultivation or grazing.Published as part of Csuzdi, Cs., Sherlock, E., Kouete, M. Talla & Doherty-Bone, T. M., 2015, Four new earthworm species from the highlands of Cameroon with description of a new genus Okudrilus gen. n. (Oligochaeta: Eudrilidae & Acanthodrilidae), pp. 25-38 in African Invertebrates 56 (1) on page 27, DOI: 10.5733/afin.056.0103, http://zenodo.org/record/767041
Okudrilus Csuzdi & Sherlock & Kouete & Doherty-Bone 2015, gen. n.
No full textOkudrilus Csuzdi & Sherlock gen. n. Etymology: Referring to Mount Oku, North-West Region, Cameroon —the highest mountain in the region and a collecting locality of all three the new species. Gender: masculine. Diagnosis: Eudrilinae with closely paired setae and paired male pores close to 17/18. Spermathecal pores preclitellar, paired between a–a. Female pores paired in 14 close to 14/15 near d. Oesophageal gizzard in 6, intestinal gizzards absent. Dorsal blood vessel simple throughout. Paired calciferous glands in 12 and unpaired chylous-sacs in 10, 11. Male genital apparatus metandric with long, backward-running vesicles. Excretory system holoic, vesiculate. Ovo-spermathecal apparatus paired with ventral interconnecting duct. Simple penial setae present. All species in this genus are known only from highland areas above 1000 m in the North West Region. Type-species: Okudrilus monticolus sp. n. Remarks: Okudrilis gen. n. is similar to Metascolex Michaelsen, 1903 in the paired genital pores and metandric condition of the male genitalia; however, Okudrilis differs from it in the position of the gizzard (it is in 5 in Metascolex and 6 in Okudrilus), in the interconnected ovo-spermathecal system and furthermore by the presence of penial setae. Okudrilis with its paired calciferous glands in 12 and paired genital pores resembles Vomia Segun, 1976 as well, but differs from it in the metandric condition of the male genitalia and the long backward-running vesicles (Table 1).Published as part of Csuzdi, Cs., Sherlock, E., Kouete, M. Talla & Doherty-Bone, T. M., 2015, Four new earthworm species from the highlands of Cameroon with description of a new genus Okudrilus gen. n. (Oligochaeta: Eudrilidae & Acanthodrilidae), pp. 25-38 in African Invertebrates 56 (1) on page 28, DOI: 10.5733/afin.056.0103, http://zenodo.org/record/767041
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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