1,721,010 research outputs found
Leaus Matthews & Lawrence 1992
No full textLeaus Matthews & Lawrence, 1992 (Figs 5, 10, 20 –36, 39, 40, 44, 47, 48, 50, 51, 54, 56) Type species. Leaus tasmanicus Matthews & Lawrence, 1992, by monotypy. Redescription. Adults. With the characteristics of the tribe. Length 3.9–8.4 mm. Body parallel-sided, 2.2 –3.0 times as long as wide. Upper surfaces nitid fuscous or castaneous, clothed with recumbent white setae forming patterns on dark background, also with long sparse erect pilosity. Head: Basal membrane of labrum narrow but exposed and complete. Eyes entire, broadly oval. Antennae short, not quite reaching base of prothorax, antennomeres obconic, gradually widening distally, apical segment large and suboval. Mentum small, subquadrate or a little transverse. Prothorax: Pronotum densely punctate, moderately convex, lateral carinae present. Procoxal cavities internally open. Trochantins absent. Pterothorax: Elytral disc at least slightly uneven, without striae, with partly effaced puncture rows. Wings fully developed. Legs: Procoxae subconical, approximated, projecting well below prosternum. Tarsi about as long as tibiae. Abdomen: Intercoxal process narrowly triangular. First three ventrites connate. Defensive glands present, small, widely separated. Female: Ovipositor with paraprocts elongate, about twice as long as coxites, baculi of first coxite lobes diagonal, short, coxites with four distinct pairs of lobes. Spermatheca coiled, attached to base of accessory gland. Single vaginal sclerite with median keel and transverse lateral wings. Description. Larva. With the characteristics of the tribe. Dorsal surfaces bicolored with a complex pattern of dark brown markings on a yellow background. Head with sides subparallel (Fig. 40); larger anterior epipharyngeal sensilla (Fig. 54) with anterior 2 moderately widely separated and well separated from the posterior 4, which form a subquadrate cluster; posterior sensilla forming two longitudinal rows of 4; mandibles bidentate with short subapical tooth on incisor edge; left mola with several weak transverse ridges; gula 3 times as long as wide; hypopharyngeal sclerome anteriorly trilobed. Prothorax almost as long as wide. Legs slightly longer than thoracic width and clothed with fine hairs. Abdomen about 3.5 times as long as thorax; tergum I with weak anterior carina; tergum IX (Fig. 47) slightly shorter at midline and slightly narrower than VIII, carina simple; urogomphi (Fig. 48) each with 4 setiferous tubercles at about middle; surface of concave disc lightly pigmented, dark-rimmed pits less regularly spaced and concentrated around a pair of posterolateral impressions; segment X with a pair of tubular pygopods (Fig. 44). Spiracles annular-cribriform with the peritreme completely surrounded by a cribriform plate (Fig. 56). Larval material examined: Leaus tasmanicus Matthews & Lawrence. AUS: Tasmania: Pelion (41.50 S, 146.08 E), 1991, pyrethrin knockdown, rainforest, P. Greenslade & M. Comfort (ANIC). Discussion. At the time of its description Leaus was placed in Heleini because it shows the basal tenebrionine characteristics of that tribe and, in particular, similarities to the heleine genus Lepispilus. Both Leaus and Lepispilus have pale dorsal setae which form a mottled pattern, and they share the unusual character of a vaginal sclerite. At the same time, it was mentioned that there is a resemblance between Leaus and Trachelostenus in the form of prominent coxae. Later, Matthews (2003) transferred Leaus to Titaenini, another basal tribe of Tenebrioninae, as discussed in the introduction. We now know that Titaenini as then conceived by Matthews was a paraphyletic assemblage of primitive Tenebrioninae sharing mainly plesiomorphies. Lepispilus differs from Leaus in the absence of prominent coxae, presence of a medial fleck on the wings, complete elytral epipleura, aedeagal alae not of the appendiculate type, and unique ovipositor structure. The ovipositor of Lepispilus (illustrated in Matthews & Bouchard 2008, fig. 47 C) does not resemble that of any other known tenebrionid. There is therefore no evidence of a direct relationship between Lepispilus and Leaus or any other trachelostenine. The peculiar type of spiracular opening surrounded by a cribriform plate in larvae of Leaus (called annularcribriform by Lawrence et al. 2011) is perhaps an adaptation to wetter habitats and has been found sporadically in various other unrelated families of Coleoptera including Trogossitidae-Lophocaterinae, Mycteridae-Hemipeplinae, and Chrysomelidae-Cryptocephalinae.Published as part of Matthews, Eric G. & Lawrence, John F., 2015, Trachelostenini sensu novo: redescriptions of Trachelostenus Solier, Myrmecodema Gebien and Leaus Matthews & Lawrence, based on adults and larvae, and descriptions of three new species of Leaus (Coleoptera: Tenebrionidae), pp. 289-312 in Zootaxa 4020 (2) on pages 301-304, DOI: 10.11646/zootaxa.4020.2.4, http://zenodo.org/record/23647
Leaus monteithi Matthews & Lawrence, 2015, sp. n.
No full textLeaus monteithi sp. n. (Figs 5, 22, 25, 30, 34) Description. With the characteristics of the genus. Length 5.3 –6.0 mm, maximum width of prothorax 1.5–1.7 mm, width at humeri 1.9 –2.0 mm. Legs flavo-castaneous at bases and apices of femora and most of tibiae, otherwise fuscous. Prothorax with sides unevenly convex, widest at basal third, lateral carinae simple, disc with pair of low median tumosities on either side of depressed and glabrous median line, basally shallowly transversely depressed. Pterothorax. Elytra with strong basal tumosities and moderately deep transverse depression behind them. Abdomen. Ovipositor without gonostyli. Vaginal sclerite with wings anteriorly recurved. Aedeagal parameres simple. Larva unknown. Distribution. Northern NSW in open eucalypt forest, obtained by pyrethrum fogging of moss on a tree trunk by Geoff Monteith (QMBA), after whom the species is named. Type specimens: Holotype ♀: NSW: 30 o 29 ’ 42 ”S, 152 o 21 ’ 27 ” Point Lookout Rd, radar beacon, 1390m, 13–14 Nov 2008. G. Monteith. Pyrethrum, trees, open for. (QMBA T 228901). Paratypes: same data as holotype, 1 ♂, 1 sex not determined (QMBA), 2 ♀♀ in spirit COL 427 (ANIC)Published as part of Matthews, Eric G. & Lawrence, John F., 2015, Trachelostenini sensu novo: redescriptions of Trachelostenus Solier, Myrmecodema Gebien and Leaus Matthews & Lawrence, based on adults and larvae, and descriptions of three new species of Leaus (Coleoptera: Tenebrionidae), pp. 289-312 in Zootaxa 4020 (2) on page 310, DOI: 10.11646/zootaxa.4020.2.4, http://zenodo.org/record/23647
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
