106,329 research outputs found
Auritidibacter YASSIN ET AL. 2011
No full textEMENDED DESCRIPTION OF THE GENUS AURITIDIBACTER YASSIN ET AL. 2011 The genus Auritidibacter is as described by Yassin et al. [1] except that cells may be straight or curvy; morphologically, cells may or may not demonstrate a rod–coccus cycle over time. Motility may be difficult to demonstrate except by the hanging drop method. DNA G+C content of the type strain is 59.3% with a genome size of approx. 2589795 bps by WGS.Published as part of Bernard, K. A., Pacheco, A. L., Burdz, T., Wiebe, D., Beniac, D. R., Hiebert, S. L., Booth, T. F., Jakopp, B., Goldenberger, D., Seth-Smith, H. M. B., Egli, A. & Bernier, A-M, 2020, Emendation of the Genus Auritidibacter Yassin et al. 2011 and Auritidibacter ignavus Yassin et al. 2011 based on features observed from Canadian and Swiss clinical isolates and wholegenome sequencing analysis, pp. 83-88 in International Journal of Systematic and Evolutionary Microbiology 70 (1) on page 86, DOI: 10.1099/ijsem.0.003719, http://zenodo.org/record/604866
Drosophila vulcana Yassin, Suwalski & Ravaomanarivo, 2019, sp. nov.
No full text‘ D. vulcana species complex’ new complex Figs 1–2, 3C, 8 A–D, 9A–F Diagnosis Male abdominal tergites yellow, T2–T4 with broad brown or black stripes, T5 and T6 with a thin black stripe expanding on the middle and fainting towards the margin (Fig. 8A); cercal ventral lobe (secondary clasper) partially separated from cerci with two or three very large curved black medial teeth on the internal margin; surstylus with a lateral row of strong, short prensisetae on the outer and inner margins (no medial prensisetae), the innermost one significantly long; hypandrial median process tapering (Fig. 3C); aedeagus hirsute with cuticular scales; inner paraphyses as long as aedeagus, with finely serrated margins (Fig. 9 A–D). Female abdominal tergites darker than male’s (Fig. 8B). Remarks Chassagnard et al. (1997) mentioned a species, named ‘ Drosophila (Sophophora) sp. C’, belonging to the ‘ D. montium species group’ in Malawi with males having diffuse brown T2–T4 and pale T5 and T6. This species either belongs to one of the two species of this complex or represents a new species belonging to the complex. Elucidating its identity needs further investigation. Taxon content D. vulcana Graber, 1957. D. seguyiana sp. nov.Published as part of Yassin, Amir, Suwalski, Arnaud & Raveloson Ravaomanarivo, Lala H., 2019, Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar, pp. 1-26 in European Journal of Taxonomy 532 on page 18, DOI: 10.5852/ejt.2019.532, http://zenodo.org/record/325156
Auritidibacter ignavus Yassin 2011
No full textEMENDED DESCRIPTION OF AURITIDIBACTER IGNAVUS YASSIN ET AL. 2011 Auritidibacter ignavus (ig.na′ vus. L. masc. adj. ignavus inactive). In addition to properties described for the emended genus or as described for A. ignavus by Yassin et al. [1], strains may show the following characteristics: cells measure 1.85±0.45 µm in length and have a width of 0.44±0.05 µm. May assimilate substrate at pH 6. Reduction of nitrite not observed. Vogues–Proskauer (acetoin) production, DNase and starch hydrolyses are variable. Pyrrolidonyl arylamidase, esterase, leucine arylamidase and naphthol-AS-BIphosphohydrolase are variable. Isolates may grow at 42 °C and not at 25 °C. Isolates neither ferment nor assimilate conventional sugars nor those found in API panels. Using the Biolog panel, isolates may be positive or borderline positive for the utilization of dextrin, L-glutamic acid,L-pyroglutamic acid, p -hydroxyphenylacetic acid, D-galacturonic acid, L-lactic acid, Tween 40, Ɣ- aminobutyric acid, α-hydroxybutyric acid, β-hydroxy-DL-butyric acid, α-ketobutyric acid and acetic acid. In sensitivity tests, tetrazolium dyes may be reduced at pH 6, in 1%, 4%, and 8% NaCl, nalidixic acid, lithium chloride, potassium tellurite, aztreonam, sodium butyrate and sodium bromate. The remaining substrates are variably utilized or not used. Isolates have been obtained from ear infections from patients located in Germany, Switzerland and Canada and detected by DNA sequencing from a bacteremia in Spain. A. ignavus NML 100628 has been deposited in two culture collections (NCTC 14178= LMG 30897) to serve as an additional reference strain for this species. The genomic DNA G+C content of the type strain (A. ignavus DSM 45359 T) is 59.3% with those of other strains ranging from 59.4 to 59.5%.Published as part of Bernard, K. A., Pacheco, A. L., Burdz, T., Wiebe, D., Beniac, D. R., Hiebert, S. L., Booth, T. F., Jakopp, B., Goldenberger, D., Seth-Smith, H. M. B., Egli, A. & Bernier, A-M, 2020, Emendation of the Genus Auritidibacter Yassin et al. 2011 and Auritidibacter ignavus Yassin et al. 2011 based on features observed from Canadian and Swiss clinical isolates and wholegenome sequencing analysis, pp. 83-88 in International Journal of Systematic and Evolutionary Microbiology 70 (1) on pages 86-87, DOI: 10.1099/ijsem.0.003719, http://zenodo.org/record/604866
Drosophila (Sophophora) mylenae Yassin & Suwalski & Raveloson Ravaomanarivo 2019, sp. nov.
No full textDrosophila (Sophophora) mylenae David & Yassin sp. nov. urn:lsid:zoobank.org:act: B64DA5B1-4F29-456B-B75E-0E84DFB3DA98 Figs 1–2, 8 C–D, 9B, D, F Diagnosis Male abdominal tergites T5 and T6 with a distinct dark brown stripe expanding in the middle and fainting towards the margins (Fig. 8B); hypandrium broad with a short anterior phragma; outer paraphases posterior margin not curved; aedeagus pilosity broad at tip (Fig. 9B, D); female abdominal tergites T2–T4 with a diffuse pale region on the antero-distal margins, T5 with distinct dark stripe (Fig. 8D); oviscapt fourth posterior peg-like outer ovisensillum on the same axis with the third and fifth ovisensilla, with anterior ovisensilla short and thick (Fig. 9F). Etimology A species dedicated to Mylène Dauvergne, co-collector of the type strain. Type material Holotype MADAGASCAR • ♂; Nosy Be; 13°20′ S, 48°15′ E; Jul. 2008 (ex-laboratory strain Feb. 2017); J.R. David and M. Dauvergne leg.; MNHN. Paratypes MADAGASCAR • 9 ♂♂, 10 ♀♀; same collection data as for holotype; MNHN. Other material MADAGASCAR • 5 ♂♂, 5 ♀♀; same collection data as for holotype; ZUAC. Description Male HEAD (Fig. 8C). Frons pale brown, frontal length 0.35 mm; frontal index = 1.00, frontal tapering ratio = 1.29. Frontal triangle concolorous; ocellar triangle slightly darker, about 43% of frontal length. Orbital plates about 86% of frontal length. Orbital setae black, distance of or3 to or1 = 50% of or3 to vtm, or1 / or3 ratio = 1.33, or2/or1 ratio = 0.38, postocellar setae = 29%, ocellar setae = 50%, vibrissal index = 1.00. Face white. Carina prominent, narrow. Cheek index about 12.00. Eye red, eye index = 1.15. Antennae whitish. Arista with four dorsal, three ventral branches, plus terminal fork. Proboscis brown. THORAX (Fig. 8C). Length 1.13 mm. Scutum mid brown, shining, darker before scutellum, six rows of acrostichal setulae. H index = 1.17. Transverse distance of dorsocentral setae 200% of longitudinal distance; dc index = 0.61. Scutellum dark; scut index = 0.80. Pleura slightly darker, shining. Legs whiteyellow, sex combs on protarsomeres 1 and 2, with about 18 and 13 peg-like setae, respectively. Wing dark, length 1.54 mm, length to width ratio = 2.08. Indices: C = 1.93, ac = 3.06, hb = 0.62, 4C = 1.72, 4v = 3.03, 5x = 0.56, M = 1.13, prox. x = 0.72. Haltere brown. ABDOMEN (Fig. 8C). Yellow, tergites T2–T4 with a diffuse brown posterior stripes, tergites T5 and T6 pale with small posterior stripes. TERMINALIA (Figs 3C, 9B, D). Epandrium pale brown, with 6 setae, the lower most being particularly long; ventral lobe with 5–7 bristles. Cercus pale brown; cercal ventral lobe yellow, partially separated from cercus, with a series of three strong, curved spines on the inner margin, and smaller spines along the ventral, outer and dorsal margins, larger dorsally. Surstylus with a regular row of five short, stout peg-like prensisetae, and a ventromedial cluster of prensisetae, the innermost pointing dorsally. Hypandrium yellow, slightly longer than broad, with a pointed medial posterior extension bearing two short, divergent thick bristles; posterior margin microtrichose with long fine hairs. Outer paraphyses large, ovoid, transverse, bearing three minute setulae. Inner paraphyses almost as long as aedeagus, swollen medially, tapering and incurved medioposteriorly. Aedeagus hirsute, broad at tip, subapically narrowed. Aedeagal apodeme yellow, broadened laterally. Female HABITUS (Fig. 8D). Similar to male, but with no sex combs on protarsi and with abdominal tergites brown. TERMINALIA (Fig. 9F). Valve of oviscapt mediodorsally mostly membranous, posteriorly rounded, ventrally slightly concave, with no discal and twelve marginal, peg-like, pointed-tipped, short and thick ovisensilla on the outer surface and one long, straight, subterminal and three tiny (microscopic) trichoidlike ovisensilla on the inner surface. Distribution Madagascar (endemic). Remarks Drosophila mylenae sp. nov. resembles D. vulcana in the shape of the male periphallic structures (compare Fig. 3C with figure 1 in Rafael 1984) and the female ovipositor (Fig. 9 E–F) as well as in the abdominal pigmentation pattern of females being darker than males (Fig. 8), which is rare among drosophilids. However, they differ in the degree of abdominal pigmentation for both sexes and in multiple phallic structures (Figs 8–9 A–D). The two species show a very low mitogenomic divergence of 0.5% (Figs 1–2). However, on the nuclear gene Amyrel they are quite distinct (Fig. 2), with an overall nuclear genome-wide divergence of 2.35% (Yassin, in prep.). Drosophila mylenae sp. nov. was only collected in the littoral forest on Nosy Be. It is absent from material collected from the inland, humid forests of Madagascar, i.e., Antananarivo, Mandraka, Andasibe and Ranomafana. It is also absent from Mayotte or other islands of the Western Indian Ocean. Females do not exhibit a sex-limited color dimorphism.Published as part of Yassin, Amir, Suwalski, Arnaud & Raveloson Ravaomanarivo, Lala H., 2019, Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar, pp. 1-26 in European Journal of Taxonomy 532 on pages 21-22, DOI: 10.5852/ejt.2019.532, http://zenodo.org/record/325156
Fig. 9 in Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar
No full textFig. 9. Terminalia of the 'D. vulcana species complex'. A, C, E. D. vulcana Graber, 1957 (MNHN). A, C. ♂. E. ♀. B, D, F. D. mylenae David & Yassin sp. nov. (MNHN). B, D. ♂. F. ♀. Scale bars: A–B = 50 µm; D–F = 100 µm.Published as part of Yassin, Amir, Suwalski, Arnaud & Raveloson Ravaomanarivo, Lala H., 2019, Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar, pp. 1-26 in European Journal of Taxonomy 532 on page 19, DOI: 10.5852/ejt.2019.532, http://zenodo.org/record/325156
Fig. 8. Adult habitus. A–B. D. vulcana Graber, 1957 in Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar
No full textFig. 8. Adult habitus. A–B. D. vulcana Graber, 1957 (MNHN). A. ♂. B. ♀. C–D. D. mylenae David & Yassin sp. nov. (MNHN). C. ♂. D. ♀. Scale bar = 1 mm.Published as part of Yassin, Amir, Suwalski, Arnaud & Raveloson Ravaomanarivo, Lala H., 2019, Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar, pp. 1-26 in European Journal of Taxonomy 532 on page 18, DOI: 10.5852/ejt.2019.532, http://zenodo.org/record/325156
Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar
No full textYassin, Amir, Suwalski, Arnaud, Raveloson Ravaomanarivo, Lala H. (2019): Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar. European Journal of Taxonomy 532: 1-26, DOI: https://doi.org/10.5852/ejt.2019.53
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Drosophila (Sophophora) curta Chassagnard & Tsacas 1997
No full textDrosophila (Sophophora) curta Chassagnard & Tsacas, 1997 Figs 1–2, 4 E–F, 5C, 6E–F Drosophila (Sophophora) curta Chassagnard & Tsacas in Chassagnard et al., 1997: 93. Diagnosis Male and female body pigmentation including halters and legs yellow (Fig. 4 E–F); male abdominal tergites T2–T4 with a broad black stripes expanding towards the margins, T5 and T6 completely black (Fig. 4E); dorsalmost surstylus prensiseta not on the same axis with remaining prensisetae; hypandrial median process truncated and serrated; aedeagus spatulate (Fig. 5C); female T2 with a thin black stripe expanding on the middle and fainting towards the margin, T3–T5 with a broad black stripe and an expanding grayish area on the margin (Fig. 4F); oviscapt fourth posterior peg-like outer ovisensillum on the same axis with the third and fifth ovisensilla (Fig. 6C), with anterior ovisensilla long and thin, almost setiferous (Fig. 6D). Type material Holotype MALAWI • ♂; Cape Maclear; 14°01′ S, 34°51′ E; 30 Mar. 1991; D. Lachaise leg.; MNHN. Other material MADAGASCAR • 5 ♂♂, 5 ♀♀; Andasibe; 17°20′ S, 48°54′ E; 16–17 Feb. 2008 (ex-laboratory strain Jul. 2014); J.R. David & A. Yassin leg.; ZUAC. Description As in Chassagnard et al. (1997). Distribution Malawi (type) and Madagascar (new record). Remarks Yassin et al. (2016) included a Kenyan strain of D. curta in their phylogenetic analysis. However, the strain turned out to be a likely new species belonging to the ‘ D. tsacasi species complex’ depicted in Figs 1–2 as D. aff. tsacasi (see below). In Madagascar, D. curta was collected only from Andasibe during the expedition of 2008. Females have two color morphs (Yassin et al. 2016).Published as part of Yassin, Amir, Suwalski, Arnaud & Raveloson Ravaomanarivo, Lala H., 2019, Resolving the synonymy and polyphyly of the ' Drosophila bakoue species complex' (Diptera: Drosophilidae: ' D. montium species group') with descriptions of two new species from Madagascar, pp. 1-26 in European Journal of Taxonomy 532 on pages 14-15, DOI: 10.5852/ejt.2019.532, http://zenodo.org/record/325156
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