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Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand
No full textToolmal, Nopparut, Suddee, Somran, Culham, Alastair, Utteridge, Timothy M. A., Schuiteman, André (2023): Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand. Phytotaxa 601 (3): 223-262, DOI: 10.11646/phytotaxa.601.3.3, URL: http://dx.doi.org/10.11646/phytotaxa.601.3.
FIGURE 15. Thrixspermum simile. A. Plant habit. B. Inflorescences with flowers. C in Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand
No full textFIGURE 15. Thrixspermum simile. A. Plant habit. B. Inflorescences with flowers. C. Rachis with flowers (front view). D. Flower (oblique view, close-up). E. Flower (lateral view, close-up). Photographed by André Schuiteman (A–B. In situ, Mondulkiri Province, Cambodia; D. In situ, Koh Kong Province, Cambodia) & Wattana Tanming (C & E. Cultivation, QSBG). Illustration assembled by Yongyuth Rattanasootr.Published as part of Toolmal, Nopparut, Suddee, Somran, Culham, Alastair, Utteridge, Timothy M. A. & Schuiteman, André, 2023, Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand, pp. 223-262 in Phytotaxa 601 (3) on page 246, DOI: 10.11646/phytotaxa.601.3.3, http://zenodo.org/record/814176
FIGURE 20. Thrixspermum centipeda Lour. A. Plant habit. B in Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand
No full textFIGURE 20. Thrixspermum centipeda Lour. A. Plant habit. B. Flower (oblique view, close-up). C. Inflorescences with flowers. D. Flowers (oblique & lateral views). Photographed by Pilchar Ngai (A & C. Cultivation, Hong Kong), Yosuke Oda (B. Cultivation, Laos) & Edward Mar (D. Cultivation, Hong Kong). Illustration assembled by Yongyuth Rattanasootr.Published as part of Toolmal, Nopparut, Suddee, Somran, Culham, Alastair, Utteridge, Timothy M. A. & Schuiteman, André, 2023, Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand, pp. 223-262 in Phytotaxa 601 (3) on page 252, DOI: 10.11646/phytotaxa.601.3.3, http://zenodo.org/record/814176
FIGURE 13. Thrixspermum simile. A. Habit. B in Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand
No full textFIGURE 13. Thrixspermum simile. A. Habit. B. Rachis with flowers (front view). C. Rachis with flowers (lateral view). D. Lip (natural position, adaxial view). E. Dissected perianth. F. Lip with column, column-foot & pedicel (lateral view). G. Lip (adaxial view, spread out). H. Lip (longitudinal section). I. Column with pedicel (ventral view). J. Operculum (dorsal view). K. Pollinia (two pairs). L. Stipe & viscidium. (Drawn from holotype, N. Toolmal et al. 24082101, TTM 0006416). Illustration by Phattaravee Prommanut.Published as part of Toolmal, Nopparut, Suddee, Somran, Culham, Alastair, Utteridge, Timothy M. A. & Schuiteman, André, 2023, Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand, pp. 223-262 in Phytotaxa 601 (3) on page 244, DOI: 10.11646/phytotaxa.601.3.3, http://zenodo.org/record/814176
FIGURE 22. Thrixspermum polystictum. A in Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand
No full textFIGURE 22. Thrixspermum polystictum. A. Flower (front view, close-up). B. Flowers (lateral view). C. Dissected perianth. D. Lip (left: adaxial view in natural position; middle: adaxial view when spread out; right: abaxial view when spread out). E. Lip, adaxial view (showing the callus and a large orange warts on the back wall of spur). F. Lip, lateral view (left: natural position; right: longitudinal dissection). G. Column & column-foot with pedicel (ventral, lateral & dorsal views). H. Operculum (left: dorsal view; right: ventral view). I. Pollinia (two pairs). J. Stipe & viscidium. Photographed by Wattana Tanming (A–H) & Nopparut Toolmal (I & J). Illustration assembled by Yongyuth Rattanasootr. A–H from living collection (QSBG) and I–J from spirit collection of N. Toolmal et al. 10092102 TTM 0006428.Published as part of Toolmal, Nopparut, Suddee, Somran, Culham, Alastair, Utteridge, Timothy M. A. & Schuiteman, André, 2023, Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand, pp. 223-262 in Phytotaxa 601 (3) on page 255, DOI: 10.11646/phytotaxa.601.3.3, http://zenodo.org/record/814176
Thrixspermum obyrneanum (Aeridinae), a new species from Peninsular Thailand and Malaysia.
No full textThrixspermum obyrneanum (sect. Thrixspermum) is a new species described from Narathiwat Province, southern Thailand, and from Kelantan, Peninsular Malaysia. It is morphologically similar to T. leucarachne but differs in the much shorter sepals and petals, tepals and lip pale yellow, lateral lobes of the lip 6–7 mm long, broadly triangular to ovate, with narrowly truncate and erose apex, mid-lobe 3.0–4.7 mm long, cylindrical to broadly triangular, obtuse
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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