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Relationships among pest flour beetles of the genus Tribolium (tenebrionidae) inferred from multiple molecular markers
No full textMol Phylogenet Evol. 2008 January ; 46(1): 127-141
Author Manuscrip
The Compact Body Plan of Tardigrades Evolved by the Loss of a Large Body Region
Get PDFThe superphylum Panarthropoda (Arthropoda, Onychophora,
and Tardigrada) exhibits a remarkable
diversity of segment morphologies, enabling these
animals to occupy diverse ecological niches. The
molecular identities of these segments are specified
by Hox genes and other axis patterning genes
during development [1, 2]. Comparisons of molecular
segment identities between arthropodandonychophoran
species have yielded important insights into the
origins and diversification of their body plans [3–9].
However, the relationship of the segments of tardigrades
to those of arthropods and onychophorans
has remained enigmatic [10, 11], limiting our understanding
of early panarthropod body plan diversification.
Here, we reveal molecular identities for all of the
segments of a tardigrade. Based on our analysis, we
conclude that tardigrades have lost a large intermediate
region of thebody axis—aregion correspondingto
the entire thorax and most of the abdomen of insects—
and that they have lost the Hox genes that
originally specified this region. Our data suggest that
nearly the entire tardigrade body axis is homologous
to just the head region of arthropods. Based on our results,
we reconstruct a last common ancestor of Panarthropoda
that had a relatively elongate body plan
like most arthropods and onychophorans, rather
than a compact, tardigrade-like body plan. These results
demonstrate that the body plan of an animal
phylum can originate by the loss of a large part of
the body
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
FIGURE 18 in New insights into the identities of the elasmobranch fauna of Sri Lanka
No full textFIGURE 18. Centrophorus cf. atromarginatus (A–C) and Centrophorus uyato (D–F) (Centrophoridae). A. Lateral view of female (SL-87; BRT-I 0021). B. Ventral view of head of female (SL-87; BRT-I 0021). C. Denticles on left side below dorsal fin of female (SL-87; BRT-I 0014). D. Lateral view of female (SL-96; BRT-I 0026). E. Ventral view of head of female (SL-96; BRT-I 0026). F. Denticles on left side below dorsal fin of female (SL-96; BRT-I 0026).Published as part of Fernando, Daniel, Bown, Rosalind M. K., Tanna, Akshay, Gobiraj, Ramajeyam, Ralicki, Hannah, Jockusch, Elizabeth L., Ebert, David A., Jensen, Kirsten & Caira, Janine N., 2019, New insights into the identities of the elasmobranch fauna of Sri Lanka, pp. 201-238 in Zootaxa 4585 (2) on page 232, DOI: 10.11646/zootaxa.4585.2.1, http://zenodo.org/record/263723
Carcharhinus amblyrhynchoides Whitley
No full textCarcharhinus amblyrhynchoides (Whitley) (Figs. 4A, 14 A–D) One specimen morphologically consistent with Carcharhinus amblyrhynchoides (SL-18) was examined near the main Erinchamman Kovilady market in Point Pedro in the Northern Province. It differed in NADH2 sequence from our reference specimen of this species from Malaysian Borneo (HBO-34; JQ519102) by 8 bp. This name is in current use for this species in Sri Lanka (see De Silva 1984 –1985, 2006, 2015; De Bruin et al. 1995; Morón et al. 1998).Published as part of Fernando, Daniel, Bown, Rosalind M. K., Tanna, Akshay, Gobiraj, Ramajeyam, Ralicki, Hannah, Jockusch, Elizabeth L., Ebert, David A., Jensen, Kirsten & Caira, Janine N., 2019, New insights into the identities of the elasmobranch fauna of Sri Lanka, pp. 201-238 in Zootaxa 4585 (2) on page 222, DOI: 10.11646/zootaxa.4585.2.1, http://zenodo.org/record/263723
FIGURE 8 in New insights into the identities of the elasmobranch fauna of Sri Lanka
No full textFIGURE 8. Maculabatis gerrardi (A–B) and Maculabatis arabica (C–E) (Dasyatidae). A. Dorsal surface of mature female (SL-40); inset showing scapular denticles. B. Dorsal surface of immature male (SL-58); inset showing scapular denticles. C. Dorsal surface of immature female (SL-6); inset showing scapular denticles. D. Oronasal region of immature female (SL-6). E. Tail base and anterior tail region of immature female (lateral view; SL-6).Published as part of Fernando, Daniel, Bown, Rosalind M. K., Tanna, Akshay, Gobiraj, Ramajeyam, Ralicki, Hannah, Jockusch, Elizabeth L., Ebert, David A., Jensen, Kirsten & Caira, Janine N., 2019, New insights into the identities of the elasmobranch fauna of Sri Lanka, pp. 201-238 in Zootaxa 4585 (2) on page 213, DOI: 10.11646/zootaxa.4585.2.1, http://zenodo.org/record/263723
FIGURE 3 in Morphological and molecular diversification of slender salamanders (Caudata: Plethodontidae: Batrachoseps) in the southern Sierra Nevada of California with descriptions of two new species
No full textFIGURE 3. Morphological comparisons of Batrachoseps from the Kern River Canyon. A–F. Principal components analysis of correlation matrix of regression residuals of specimens from in and around the Kern River Canyon. Each color/symbol combination indicates a population. A–C compare B. relictus from the Lower Kern River Canyon, two candidates for inclusion in B. relictus (Breckenridge Mountain represented by the Lucas Creek and Squirrel Meadow populations and Greenhorn Mountains 1 and 2 from north of the Kern River), and B. kawia, which is the sister taxon to the Greenhorn populations. D–F show differentiation of the Upper Kern River Canyon populations (magenta), described here as Batrachoseps bramei sp. nov., from their close relatives B. gregarius (gray) and B. simatus (black). G–J. Boxplots of principal components (G–I) and SL (J) for species in and around Kern River Canyon. Refer to the web version of this article for color figure.Published as part of Jockusch, Elizabeth L., Martínez-Solano, Iñigo, Hansen, Robert W. & Wake, David B., 2012, Morphological and molecular diversification of slender salamanders (Caudata: Plethodontidae: Batrachoseps) in the southern Sierra Nevada of California with descriptions of two new species, pp. 1-30 in Zootaxa 3190 on page 7, DOI: 10.5281/zenodo.21526
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