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FIGURE 32 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
No full textFIGURE 32. Tetranychus canadensis, larva, A, prodorsum; B, posterior dorsum; C, posterior venter. Scale bar 20 μm.Published as part of Liu, Man, Yi, Tian-Ci, Gulbronson, Connor, Bauchan, Gary R. & Ochoa, Ronald, 2020, Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae), pp. 215-250 in Zootaxa 4857 (1) on page 245, DOI: 10.11646/zootaxa.4857.1.11, http://zenodo.org/record/439639
Ceratotarsonemus De Leon 1956
No full textGenus Ceratotarsonemus De Leon, 1956 Type species: Ceratotarsonemus scitus De Leon, 1956 Diagnosis. see Lindquist, 1986, p. 312-315 and Ochoa et al., p. 178. Differential diagnosis. According to Ochoa et al. (1995), the adult females of Ceratotarsonemus, Daidalotarsonemus and Excelsotarsonemus are similar mainly by having some dorsal idiosomal setae enlarged (either greatly elongated and barbed, or thickened and lanceolate). Lindquist (1986) stated that both sexes of Ceratotarsonemus are distinctive in having setae c2 coarsely barbed and at least moderately elongated, in retaining only one genual setae on leg III, and consistently lacking tibial solenidion φ2 on leg I. In Daidalotarsonemus and Excelsotarsonemus females the setae c 2 may be either slender or leaf-shaped, 2-3 setae are present on genu III, and tibial solenidion φ2 is present on leg I.Published as part of Rezende, José Marcos, Lofego, Antonio Carlos, Gulbronson, Connor, Bauchan, Gary & Ochoa, Ronald, 2018, Review of the genus Ceratotarsonemus De Leon, 1956 (Acari: Prostigmata: Tarsonemidae), with description of a new species from the Amazon Forest, pp. 271-294 in Zootaxa 4483 (2) on pages 273-274, DOI: 10.11646/zootaxa.4483.2.3, http://zenodo.org/record/143767
FIGURE 17 in Review of the genus Ceratotarsonemus De Leon, 1956 (Acari: Prostigmata: Tarsonemidae), with description of a new species from the Amazon Forest
No full textFIGURE 17. Ceratotarsonemus hexagonalis: A—dorsal view; B—bothridial seta sc1; C—prodorsal shield; D—leg I; Evariation of tarsi I; F—leg II; G—ventral view; H—dorsal view of the gnathosoma; I—egg [adapted from Ochoa et al. (1997), used with permission].Published as part of Rezende, José Marcos, Lofego, Antonio Carlos, Gulbronson, Connor, Bauchan, Gary & Ochoa, Ronald, 2018, Review of the genus Ceratotarsonemus De Leon, 1956 (Acari: Prostigmata: Tarsonemidae), with description of a new species from the Amazon Forest, pp. 271-294 in Zootaxa 4483 (2) on page 289, DOI: 10.11646/zootaxa.4483.2.3, http://zenodo.org/record/143767
Ceratotarsonemus scitus De Leon 1956
No full textCeratotarsonemus scitus De Leon (Fig. 18) Ceratotarsonemus scitus De Leon 1956: 167; Lindquist 1986: 315; Ochoa et al. 1997: 177; Lin & Zhang 2002: 49. Diagnosis. Female: Pharyngeal pump about 1/3 gnathosomal width. Palpal length about 1/3 gnathosomal length. Prodorsum without reticulation. Tergite C with inverted U-shaped reticulation dorsally, which has four rows of reticula. All dorsal setae coarsely barbed, except for bothridial setae sc1. Vertical setae v1 about ½ length scapular setae sc2 on prodorsum. Setae c1 distinctly longer than c2 on tergite C. Setae d distinctly shorter than e. Ventral surface of propodosoma with prosternal apodeme complete, extending from apodemes 1 to sejugal apodeme. Type deposition. Holotype, allotype and 12 paratypes deposited at USNM. Distribution. U.S. Plant Introduction Garden, Florida State, USA.Published as part of Rezende, José Marcos, Lofego, Antonio Carlos, Gulbronson, Connor, Bauchan, Gary & Ochoa, Ronald, 2018, Review of the genus Ceratotarsonemus De Leon, 1956 (Acari: Prostigmata: Tarsonemidae), with description of a new species from the Amazon Forest, pp. 271-294 in Zootaxa 4483 (2) on pages 288-289, DOI: 10.11646/zootaxa.4483.2.3, http://zenodo.org/record/143767
Ceratotarsonemus absurdus Suski
No full textCeratotarsonemus absurdus (Suski) (Fig. 2) Daidalotarsonemus absurdus Suski 1971: 55. Ceratotarsonemus absurdus; Lindquist 1986: 315; Ochoa et al. 1997: 177; Lin & Zhang 2002: 48. Diagnosis. Female: Pharyngeal pump about 1/3 gnathosomal width. Palpal length about ½ gnathosomal length. Prodorsum without reticulation. Tergite C without reticulation, with median furrow posteriorly. Dorsal setae v1, sc2, c1, c2 and h coarsely barbed; d and f broadly leaf-shaped, with rounded apex; setae e broadly leaf-shaped, with pointed apex. Vertical setae v1 distinctly shorter than (about 1/3 length) scapular setae sc2 on prodorsum. Setae c1 slightly shorter than c2 on tergite C. Ventral surface of propodosoma with prosternal apodeme incomplete, extending from apodemes 1 to apodemes 2, and becoming diffuse to sejugal apodeme level. Type deposition. Holotype deposited at ZMPAS. Distribution. Forest Reservation of Angavokely, Madagascar.Published as part of Rezende, José Marcos, Lofego, Antonio Carlos, Gulbronson, Connor, Bauchan, Gary & Ochoa, Ronald, 2018, Review of the genus Ceratotarsonemus De Leon, 1956 (Acari: Prostigmata: Tarsonemidae), with description of a new species from the Amazon Forest, pp. 271-294 in Zootaxa 4483 (2) on page 274, DOI: 10.11646/zootaxa.4483.2.3, http://zenodo.org/record/143767
The Regulation of Flagellar Biosynthesis and Cell Division in Campylobacter jejuni
No full textThe general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.Flagellar biosynthesis is one of the rare processes known to be spatially and numerically regulated in polarly-flagellated bacteria. Polar flagellates must spatially and numerically regulate flagellar biogenesis to create flagellation patterns for each species that are ideal for motility. FlhG ATPases numerically regulate polar flagellar biogenesis, yet FlhG orthologs are diverse in motif composition. We discovered that Campylobacter jejuni FlhG is at the center of a multipartite mechanism that likely influences a flagellar biosynthetic step to control flagellar number for amphitrichous flagellation, rather than suppressing activators of flagellar gene transcription as in Vibrio and Pseudomonas species. FlhG also influences spatial regulation of division, which is essential for viability and is typically regulated by the Min system in most bacteria. However, C. jejuni lacks the Min system, but appears to utilize FlhG and components of the flagellar MS and C ring to influence spatial regulation of division. We utilized a variety imaging techniques to quantify the in vivo effects of mutations in C. jejuni and used purified proteins to assay the in vitro enzymatic activity of FlhG and FlhF (a GTPase) to determine the influence these factors have on both regulation of flagellar biogenesis and spatial regulation of division. We found that unlike other FlhG orthologs, the FlhG ATPase domain was not required to regulate flagellar number in C. jejuni instead, other regions of C. jejuni FlhG were discovered to be involved in numerical regulation of flagellar biogenesis. Mutations in the α6 and α7 helices of FlhG were found to influence aspects of FlhG biology, spatial regulation of division, and numerical regulation of flagellar biogenesis. We also found that C. jejuni FlhG influences FlhF GTPase activity, which may mechanistically contribute to flagellar number regulation. In this work, we propose a model in which FlhF in a GTP-bound ('active') state promotes the formation of the MS and C rings at the aflagellated pole after a division event. We then hypothesize that MS and C ring proteins influence FlhG localization to stimulate FlhF GTPase activity and, by extension, numerical regulation of flagellar biogenesis and spatial regulation of division at poles. Although some aspects of this model have yet to be fully tested, our data could potentially be applied in other polar flagellates to gain a better understanding of numerical regulation of flagellar biogenesis and spatial regulation of division in these organisms
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
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