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Myochroidea, a new genus of corticolous, crustose lichens to accommodate the Lecidea leprosula group
No full textThe new lichen genus Myochroidea is described to accommodate four species of the Lecidea leprosula group. Myochroidea is characterized by a crustose, areolate, minutely crenate to almost coralloid or indistinct, grey-brown to olive-brown thallus, reddish brown apothecia with an often persistent margin, moderately branched and anastomosing paraphyses with often swollen, pigmented apical cells, asci of the Micarea-type, and colourless, one-celled, fusiform to broadly ellipsoid ascospores. The new combinations Myochroidea leprosula (Arnold) Printzen, T. Sprib. & Tonsberg comb. nov., M. porphyrospoda (Anzi) Printzen, T. Sprib. & Tonsberg comb. nov., M. rufofusca (Anzi) Printzen, T. Sprib. & Tonsberg comb. nov. and the new species M. minutula Printzen, T. Sprib. & Tonsberg are published. Lecidea porphyroplaca Hinteregger & Poelt is a synonym of M. rufofusca. Descriptions of the four species and an identification key are provided. Myochroidea leprosula and M. rufofusca are reported as new to North America
Lichen-forming and lichenicolous fungi new to Kazakhstan
No full textAlthough there is a published lichen flora of Kazakhstan, the diversity of lichen-forming and lichenicolous fungi of this country is incompletely known. Here we publish records of 41 species of lichens and 2 species of lichenicolous fungi for the first time from Kazakhstan. All collections are from the Kazakh Altai and the Saur Mountains, East Kazakhstan. Caloplaca monacensis, Immersaria iranica, Lepraria elobata, L. rigidula and Parmelina pastillifera are new for the wider surroundings of Kazakhstan, as they have neither been found in Central Asia so far, nor in southern Siberia. Several species are new to Central Asia, but were already known from the nearby Siberia
Lichen-forming and lichenicolous fungi new to Kazakhstan
No full textAlthough there is a published lichen flora of Kazakhstan, the diversity of lichen-forming and lichenicolous fungi of this country is incompletely known. Here we publish records of 41 species of lichens and 2 species of lichenicolous fungi for the first time from Kazakhstan. All collections are from the Kazakh Altai and the Saur Mountains, East Kazakhstan. Caloplaca monacensis, Immersaria iranica, Lepraria elobata, L. rigidula and Parmelina pastillifera are new for the wider surroundings of Kazakhstan, as they have neither been found in Central Asia so far, nor in southern Siberia. Several species are new to Central Asia, but were already known from the nearby Siberia
Contributions to an epiphytic lichen flora of northwest North America: I. Eight new species from British Columbia inland rain forests
No full textRecent Surveys of the inland rain forests of British Columbia and adjacent regions have brought to light an unexpectedly rich epiphytic lichen flora, including several species apparently new to science. In the first of a series of papers, we describe eight species discovered during these Surveys as new: Absconditella amabilis T. Sprib. (Ostropales), Bacidina contecta S. Ekman & T. Sprib., Biatora ourcolepra T. Sprib. & Tonsberg, Biatora ligni-mollis T. Sprib. & Printzen (all Lecanorales), Collema coniophilum Goward (Peltigerates), Pertusaria diluta C. Bjork, G. Thor & T. Wheeler (Pertusariales), Schaereria brunnea C. Bjork, T. Sprib. & T. Wheeler (Ostropomycetidae incertae sedis) and Scoliciosporum abietinum T. Sprib. (Lecanorales). We also call attention to a ninth species, Bacidina sp. A, a poorly known and possibly undescribed colonizer of moribund cyanolichens. A majority of the above species appear to be confined to old-growth forests, while two (Biatora ligni-mollis and Schaereria brunnea) are Currently known only from "antique" forests older than about 500 years. Many additional undescribed epiphytic lichens are known from inland rain forests, underscoring the need for further baseline biodiversity research in light of its ongoing disappearance as a result of resource extraction. In addition to the eight new species, we report Absconditella celata as new to North America, Absconditella lignicola as new to Canada and Montana, Bacidina chloroticula as new to British Columbia and Gyalideopsis piceicola as new to Montana
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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