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Cataglyphis laylae Cedric A. Collingwood & Donat Agosti & Mostafa R. Sharaf & Antonius van Harten 2011, nov. spec.
No full textCataglyphis laylae Collingwood nov. spec. Plates 96–103 Cataglyphis desertorum Forel, 1894, teste Collingwood, 1985; unavailable name according to Agosti (1990). Specimens examined: Holotype: 1 ☿, United Arab Emirates, al-Ain [24°13'N 55°46'E], iii.1995, leg. C.A. Collingwood (MHNG). Paratypes: 3 ☿, al-Ain zoo, 13.iii.2005, CAC. 1 ☿, Remah, 9.iii.1995, CCA. 3 ☿, Remah, resthouse, 250 m, irrigated sand dune [24°10'37"N 55°18'6"E], 18.iii.1995, leg. D. Agosti. 6 ☿, Remah, resthouse, 250 m, irrigated sand dune, nest with one entrance, [24°10'37"N, 55°18'6"E], 18.iii.1995, leg. D. Agosti. 1 ☿, Sharjah Desert Park, 5–6.x.2004, AvH; 1 ☿, 3.iii.2005, CAC. 1 ☿, al- Za'aba, 100 m, sandy soil with Rhaisa stricta [23°43'20"N, 55°33'49"E], 22.iii.1995, leg. D. Agosti. Description: A large worker from al-Ain was selected as holotype. The measurements are as follows: total length 8.40; head width 3.60; head length 4.20; scape length 3.84; funicular segment I 0.40; funicular segment II 0.23; petiole length 1.10; petiole width 0.72. Colour dark reddish brown. There are no exterior hairs on the scapes or hind tibia. The gaster, petiole and propodeum have dorsal hairs. Remarks: This species thought to correspond with C. desertorum has to be described as a new species. In fact it is one of the commonest Cataglyphis in southern Arabia. The main distinguishing feature compared with other dark Cataglyphis is the slender petiole, which has the anterior face more sloped than in other similar species such as C. niger (André, 1882) and C. savignyi (Dufour, 1862). Biology: Cataglyphus laylae nov. spec. does not appear to occur in open sandy desert and is most abundant in disturbed habitats such as man-developed plantations and open cultivated fields. Distribution: This species was recorded by Collingwood (1985) as C. desertorum from Saudi Arabia and Oman and as Cataglyphis spec. by Collingwood & Agosti (1996). Etymology: The new species is named after a village settlement called “Layla”, just north of Riyadh (Saudi Arabia) in the area where the author (CAC) first encountered it in numbers in an Acacia plantation.Published as part of Cedric A. Collingwood, Donat Agosti, Mostafa R. Sharaf & Antonius van Harten, 2011, Order Hymenoptera, family Formicidae, pp. 1-70 in Arthropod fauna of the UAE 4 on page 54, DOI: 10.5281/zenodo.116858
Lepisiota elegantissima Cedric A. Collingwood & Donat Agosti & Mostafa R. Sharaf & Antonius van Harten 2011, nov. spec.
No full textLepisiota elegantissima Collingwood & van Harten nov. spec. Plates 108–109 Specimens examined: Holotype: ☿, United Arab Emirates, Wadi Maidaq [25°18'N 56°07'E], 26.x– 9.xi.2006, in yellow and white water traps, leg. A. van Harten (NHML). Paratypes: 5 ☿, same data as holotype but in Liverpool Museum; 1 ☿, same data but 15–31.x.2010. Three workers collected from Malaise trap at Wadi Wurayah, 18–25.iii.2007, are in alcohol and were not included in the type series. Description: Head and gaster black, midbody and petiole yellowish brown. Legs and antennae yellow, the apical parts of mid and hind femora are suffusedly blackish. Surface sculpture dull, finely reticulate. Petiole long with very short blunt lateral processes (teeth). Propodeum with a pair of fine upright teeth. Mesonotum tube-like, very thin, narrow and long relative to pronotum and propodeum. Measurements (in mm): Total length 4.25–4.60; head length 0.80–0.82; head width 0.46– 0.61, scapus length 2.0, eye diameter 0.23, petiole width 0.16; petiole length 0.56; propodeal teeth 0.09; mesonotal width 0.16; mesonotal length 0.24; hind tibia 2.04; pronotum 0.90 long, 1.46 wide. Scape index 4.44 (excessively long in comparison to other species). No dorsal hairs except for a few on clypeus and some very short hairs on petiole. Differential diagnosis: An elegant elongate species with long legs and antennae, differing from L. arenaria and L. longinoda by its blunt petiole and long narrow mid-body. Etymology: The species epiphet elegantissima is derived from ‘elegans’, Latin for elegant, meaning most elegant, referring to the shape of this very beautiful species.Published as part of Cedric A. Collingwood, Donat Agosti, Mostafa R. Sharaf & Antonius van Harten, 2011, Order Hymenoptera, family Formicidae, pp. 1-70 in Arthropod fauna of the UAE 4 on pages 60-61, DOI: 10.5281/zenodo.116858
Ants of the Genus SOLENOPSIS Westwood, 1840 (Hymenoptera: Formicidae) in Egypt with a description of the worker castes of S. cooperi Donisthorpe, 1947
No full textSharaf, Mostafa R., Taylor, Brian, Klingenberg, Christiana (2009): Ants of the Genus SOLENOPSIS Westwood, 1840 (Hymenoptera: Formicidae) in Egypt with a description of the worker castes of S. cooperi Donisthorpe, 1947. Zootaxa 2004: 49-58, DOI: 10.5281/zenodo.27467
New species and record of Pselaphinae (Coleoptera: Staphylinidae) from Saudi Arabia
No full textHlaváč, Peter, Sharaf, Mostafa R., Aldawood, Abdulrahman S. (2013): New species and record of Pselaphinae (Coleoptera: Staphylinidae) from Saudi Arabia. Zootaxa 3666 (3): 331-336, DOI: 10.11646/zootaxa.3666.3.
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
Order Hymenoptera, family Formicidae
No full textCedric A. Collingwood, Donat Agosti, Mostafa R. Sharaf, Antonius van Harten (2011): Order Hymenoptera, family Formicidae. Arthropod fauna of the UAE 4: 1-70, DOI: 10.5281/zenodo.116858
FIGURES 3–4. Ctenistes staudingeri. 3 in New species and record of Pselaphinae (Coleoptera: Staphylinidae) from Saudi Arabia
No full textFIGURES 3–4. Ctenistes staudingeri. 3, aedeagus, lateral aspect; 4, aedeagus, dorsal aspect, Scale: 0.2 mm.Published as part of Hlaváč, Peter, Sharaf, Mostafa R. & Aldawood, Abdulrahman S., 2013, New species and record of Pselaphinae (Coleoptera: Staphylinidae) from Saudi Arabia, pp. 331-336 in Zootaxa 3666 (3) on page 333, DOI: 10.11646/zootaxa.3666.3.3, http://zenodo.org/record/22201
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
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