1,721,156 research outputs found
Von der heiligen Christlichen Kirchen, Ein rund unnd kurtzes Bedencken dieser Zeit nöthig und nützlich zulesen, und zuwissen: In 13. Capitel abgetheilt ...
No full textDurch ... Georgen Meyer seligen, gewesenen Pfarrherrn zu Leder gestellt, und jetzt nach seinem Todt in offenen Truck gegebe
Phylum Onychophora Grube, 1853
No full textMayer, Georg, Oliveira, Ivo De Sena (2013): Phylum Onychophora Grube, 1853. Zootaxa 3703 (1): 15-16, DOI: 10.11646/zootaxa.3703.1.
FIGURES 17–18 in Metaperipatus inae sp. nov. (Onychophora: Peripatopsidae) from Chile with a novel ovarian type and dermal insemination
No full textFIGURES 17–18. Male and female genital tracts and associated structures in Metaperipatus inae sp. nov. (ink-drawings, anterior is up). 17, Male genital tract and associated glands in dorsal view. 18, Female genital tract and associated structures in ventral view. Note the seminal receptacles (arrowheads) near the proximal ovarian end. Ed = efferent duct, od = oviduct, ov = ovary, pg = male posterior accessory gland, te = testis, ug = female uterine gland, ut = paired uteri, vd = vas deferens, vs = seminal vesicle. FIGURE 19. Embryo of Metaperipatus inae sp. nov. with a large trophic vesicle (tv) in its neck-region (stage with 20–22 leg-bearing segments formed, camera lucida drawing). An = antenna, lb = anlagen of limbs, tv = trophic vesicle.Published as part of Mayer, Georg, 2007, Metaperipatus inae sp. nov. (Onychophora: Peripatopsidae) from Chile with a novel ovarian type and dermal insemination, pp. 21-37 in Zootaxa 1440 on page 30, DOI: 10.5281/zenodo.17598
Phylum Onychophora Grube, 1853. In: Zhang, Z.-Q. (Ed.) Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness
No full textMAYER, GEORG, OLIVEIRA, IVO DE SENA (2011): Phylum Onychophora Grube, 1853. In: Zhang, Z.-Q. (Ed.) Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness. Zootaxa 3148 (1): 98, DOI: 10.11646/zootaxa.3148.1.13, URL: http://dx.doi.org/10.11646/zootaxa.3148.1.1
FIGURES 20–24 in Metaperipatus inae sp. nov. (Onychophora: Peripatopsidae) from Chile with a novel ovarian type and dermal insemination
No full textFIGURES 20–24. Characteristics of female genital tract in Metaperipatus inae sp. nov. (20, 24, SEM micrographs; 20: inset, TEM micrograph; 21–23, semi-thin sections). 20, Overview of ovary (ov) with associated structures. Distribution of accessory cell groups (ac) associated with oviducts is indicated by white brackets. Inset shows sperm cells (sz) from the ovarian tissue. 21, Cross-section of proximal ovarian portion with separate, crescent-shaped lumens (lu) on each side; dorsal is up. 22, Cross-section through the mid-ovarian portion with a narrow lumen separating the sterile (st) and germinal (ge) ovarian portions; dorsal is up. 23, Cross-section of oviduct with accessory cell groups (ac). Ac = accessory cell groups, ct = connective tissue, ge = germinal ovarian portion, lu = ovarian lumen, mc = muscular cells, oc = mature oocytes, od = oviduct, oe = inner epithelium of oviduct, ov = ovary, re = seminal receptacles (spermathecae), st = sterile ovarian cell layer, sz = sperm cells.Published as part of Mayer, Georg, 2007, Metaperipatus inae sp. nov. (Onychophora: Peripatopsidae) from Chile with a novel ovarian type and dermal insemination, pp. 21-37 in Zootaxa 1440 on page 31, DOI: 10.5281/zenodo.17598
Myoanatomy of Myzostoma cirriferum (Annelida, Myzostomida): implications for the evolution of the myzostomid body plan
No full textStudies of rare genomic marker systems suggest that Myzostomida are a subgroup of Annelida and phylogenomic analyses indicate an early divergence of this taxon within annelids. However, adult myzostomids show a highly specialized body plan, which lacks typical annelid features, such as external body annulation, coelomic cavities with metanephridia, and segmental ganglia of the nervous system. The putative loss of these features might be due to the parasitic/symbiotic lifestyle of myzostomids associated with echinoderms. In contrast, the larval anatomy and adult locomotory system resemble those of annelids. To clarify whether the myoanatomy of myzostomids reflects their relationship to annelids, we analyzed the distribution of f-actin, a common component of muscle fibers, in specimens of Myzostoma cirriferum using phalloidin-rhodamine labeling in conjunction with confocal laser-scanning microscopy. Our data reveal that the musculature of the myzostomid body comprises an outer circular layer, an inner longitudinal layer, numerous dorsoventral muscles, and prominent muscles of the parapodial complex. These features correspond well with the common organization of the muscular system in Annelida. In contrast to other annelids, however, several elements of the muscular system in M. cirriferum, including the musculature of the body wall, and the parapodial flexor muscles, exhibit radial symmetry overlaying a bilateral body plan. These findings are in line with the annelid affinity of myzostomids and suggest that the apparent partial radial symmetry of M. cirriferum arose secondarily in this species. Based on our data, we provide a scenario on the rearrangements of muscle fibers that might have taken place in the lineage leading to this species
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
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