1,720,982 research outputs found
Odonatoptera
No full textProbably basal Odonatoptera Remarks. As shown for example by Brauckmann et al. (1996), Bechly et al. (2001) and Petrulevičius & Gutiérrez (2016), basal Odonatoptera are among the most ancient Pterygota, documented from late Mississippian (Lower Carboniferous, Serpukhovian) and early Pennsylvanian (Namurian B) strata in Argentina and Central Europe.Published as part of Zessin, Wolfgang, Brauckmann, Carsten & Gröning, Elke, 2021, A new insect (probably basal Odonatoptera) from the Pennsylvanian (Late Carboniferous) of the Piesberg Fossil-Lagerstätte, Osnabrück, Germany, pp. 532-536 in Palaeoentomology 4 (6) on page 532, DOI: 10.11646/palaeoentomology.4.6.2, http://zenodo.org/record/577853
Osnabruggiala Zessin & Brauckmann & Gröning 2021, gen. nov.
No full textOsnabruggiala gen. nov. Type (and only known) species. Osnabruggiala seppelti sp. nov. Etymology. From ‘Osnabruggi’, the name of the town Osnabrück as spelled in a document from the 8th century, and Latin ala = wing. Gender: feminine. Diagnosis. As for the family.Published as part of Zessin, Wolfgang, Brauckmann, Carsten & Gröning, Elke, 2021, A new insect (probably basal Odonatoptera) from the Pennsylvanian (Late Carboniferous) of the Piesberg Fossil-Lagerstätte, Osnabrück, Germany, pp. 532-536 in Palaeoentomology 4 (6) on page 533, DOI: 10.11646/palaeoentomology.4.6.2, http://zenodo.org/record/577853
FIGURE 3 in A new insect (probably basal Odonatoptera) from the Pennsylvanian (Late Carboniferous) of the Piesberg Fossil-Lagerstätte, Osnabrück, Germany
No full textFIGURE 3. Comparison of Osnabruggiala seppelti gen. et sp. nov. and Geropteron arcuatum. A, Osnabruggiala seppelti gen. et sp. nov., with coloured wing areas compared to B, Geropteron arcuatum Riek in Riek & Kukalová-Peck, 1984 with the same coloured wing areas.Published as part of Zessin, Wolfgang, Brauckmann, Carsten & Gröning, Elke, 2021, A new insect (probably basal Odonatoptera) from the Pennsylvanian (Late Carboniferous) of the Piesberg Fossil-Lagerstätte, Osnabrück, Germany, pp. 532-536 in Palaeoentomology 4 (6) on page 535, DOI: 10.11646/palaeoentomology.4.6.2, http://zenodo.org/record/577853
Osnabruggiala seppelti Zessin & Brauckmann & Gröning 2021, sp. nov.
No full textOsnabruggiala seppelti sp. nov. (Fig. 2) Holotype. SGN GP 3048, Natureum am Schloss Ludwigslust, Museum der Naturforschenden Gesellschaft Mecklenburg, complete left mesothoracic wing with perfectly preserved venation. Etymology. Patronymic; named after Stephan Seppelt (Wrisbergholzen), to honour the finder of this beautiful insect wing. Diagnosis. As for the genus. Type locality and horizon. Claystone overlying the coal seam “Dreibänke”, Osnabrück Formation, Pennsylvanian (Late Carboniferous: Westphalian D/Asturian). Description (based on left mesothoracic wing). Preserved wing length 42 mm, maximum wing width 8.6 mm. Anterior and posterior wing margins slightly curved outwards at ca. mid length; numerous simple crossveins; ScP parallel to costal margin, ending into RA at ca. 2/3 of wing length; distally with numerous simple straight crossveins in subcostal area, basally with two rows of cells; R divided into RA and RP by 1/3 of the wing length; RA almost reaching wing apex, with many straight crossveins; RP with regularly disposed branches, secondarily bifurcate, RP 3+4 forked near the middle of the branch; MA long and simple, ending at more than 2/3 of the wing, with straight crossveins towards RP 3+4; MP + CuA 1 simple; the stem of CuA 1 ending at fork of M; CuA 2 and stem of CuA arched; CuP together with AA 1, ending nearly at midwing; AA 2 and stem of AA forming an arched vein, ending at 1/4 of wing length; JA straight, parallel to AP.Published as part of Zessin, Wolfgang, Brauckmann, Carsten & Gröning, Elke, 2021, A new insect (probably basal Odonatoptera) from the Pennsylvanian (Late Carboniferous) of the Piesberg Fossil-Lagerstätte, Osnabrück, Germany, pp. 532-536 in Palaeoentomology 4 (6) on pages 533-534, DOI: 10.11646/palaeoentomology.4.6.2, http://zenodo.org/record/577853
Late Palaeozoic Paoliida is the sister group of Dictyoptera (Insecta: Neoptera)
No full textPaoliida is an insect group of highly controversial composition and equally controversial affinities. Based on comprehensive reinvestigations we propose a new delimitation of the insect order Paoliida sensu nov. associating the families Paoliidae and Blattinopsidae on the basis of the following main wing venation characters: veins CuA convex and CuP concave separating from a rather long basal stem Cu; a short, more or less distinct, but generally convex arculus brace (crossvein) between M and CuA (more distinct in forewing than in hind wing), and a broad area containing veinlets, between CuP and CuA, with a general course of CuA making a double curve (autapomorphy); CuP straight or sigmoidal. The Paoliida is considered as a neopteran clade and potential sister group of the Dictyoptera on the basis of the presence of well-defined anterior branches of CuA, with the same convexity as the median vein and more concave than the posterior branches of the same vein (synapomorphy). The polarities of the other characters shared by these clades are discussed. New diagnoses of the order Paoliida and the family Paoliidae are provided after re-examination of the type material. We attribute Herbstiala herbsti to Paoliidae and consider Herbstialidae as a junior synonym of this family. The grylloblattid family Ideliidae is considered as a junior synonym of Paoliidae, transferring genera Stenaropodites, Aenigmidelia, Archidelia, Sojanidelia, Micaidelia, Acropermula and Mongoloidelia to this family. Kochopteron hoffmannorum and Protoblattina bouvieri are newly included in Paoliidae. Protoblattinopsis stubblefieldi is reinterpreted as a hind wing having highly specialized cubito-anal structures functionally analogous to the anal loop structure of the hind wing of the Mesozoic Isophlebioidea (Odonatoptera). We attribute Protoblattinopsis to Paoliida and consider Protoblattinidae as a junior synonym of Paoliidae. Furthermore, a new Paoliidae, Silesiapteron jarmilae gen. et sp. nov. is described from Upper Carboniferous sphaerosiderite concretion of Poland. http://zoobank.org/urn:lsid:zoobank.org:pub:296A17BD-2A84-4C1F-B19E-737DDFE7E17
Two ants (Insecta: Hymenoptera: Formicidae: Formicinae) from the Late Pliocene of Willershausen, Germany, with a nomenclatural note on the genus Camponotites
No full textTwo species of the genus Camponotites (Formicidae, Formicinae) are described from the Late Pliocene deposits of Willershausen, Lower Saxony, northern Germany: C. silvestris Steinbach, 1967, and C. steinbachi n. sp. The generic name Camponotites has been established for fossil (Tertiary) ants independently by Steinbach (Bericht der Naturhistorischen Gesellschaft zu Hannover 111:95-102, 1967) and by Dlussky (Trudy paleontologieskogo instituta, akademiA cent nauk SSSR, 1981), each for materials of different stratigraphical and geographical origin. Though poorly described, Camponotites Steinbach, 1967, and the single included (type) species C. silvestris Steinbach, 1967 (a monotypic species from the Late Pliocene of Willershausen), were based upon indication in the sense of the ICZN. Therefore, both the generic and specific names are valid and available. Camponotites Dlussky, 1981 (and its type species C. macropterus Dlussky, 1981) were certainly introduced correctly and are therefore available, too; but due to its homonymy the generic name is not valid. The revision shows that in this rare case both generic names are not only homonyms but also synonyms.Russian Foundation for Basic Research [08-04-00701
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
- …
