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A new Sobralia (Orchidaceae: Sobralieae) from Panama
No full textSerracín, Zuleika, Samudio, Zabdy, Bogarín, Diego (2022): A new Sobralia (Orchidaceae: Sobralieae) from Panama. Phytotaxa 559 (1): 81-87, DOI: 10.11646/phytotaxa.559.1.9, URL: http://dx.doi.org/10.11646/phytotaxa.559.1.
FIGURE 3. A-B in A new Sobralia (Orchidaceae: Sobralieae) from Panama
No full textFIGURE 3. A-B. Morphology of two flowers of the plant that served as the holotype. Pictures by D. Bogarín.Published as part of Serracín, Zuleika, Samudio, Zabdy & Bogarín, Diego, 2022, A new Sobralia (Orchidaceae: Sobralieae) from Panama, pp. 81-87 in Phytotaxa 559 (1) on page 85, DOI: 10.11646/phytotaxa.559.1.9, http://zenodo.org/record/700944
FIGURE 1 in A new Sobralia (Orchidaceae: Sobralieae) from Panama
No full textFIGURE 1. Fortuna Forest Reserve and Bosque Protector Palo Seco, Panama. Inset map showing the study area in red. Map by Zabdy Samudio and Jonathan González-Quiel.Published as part of Serracín, Zuleika, Samudio, Zabdy & Bogarín, Diego, 2022, A new Sobralia (Orchidaceae: Sobralieae) from Panama, pp. 81-87 in Phytotaxa 559 (1) on page 82, DOI: 10.11646/phytotaxa.559.1.9, http://zenodo.org/record/700944
FIGURE 2 in A new Sobralia (Orchidaceae: Sobralieae) from Panama
No full textFIGURE 2. Sobralia rinconiana Serracín, Samudio & Bogarín: A. habit, B. flower, C. dissected perianth, D. column and section of the lip, lateral view, E. column, ventral and ¾ lateral views, F. anther cap and pollinarium (LCDP from the plant that served as the holotype) by the authors.Published as part of Serracín, Zuleika, Samudio, Zabdy & Bogarín, Diego, 2022, A new Sobralia (Orchidaceae: Sobralieae) from Panama, pp. 81-87 in Phytotaxa 559 (1) on page 84, DOI: 10.11646/phytotaxa.559.1.9, http://zenodo.org/record/700944
Sobralia rinconiana Serracin, Samudio & Bogarin 2022, sp. nov.
No full textSobralia rinconiana Serracín, Samudio & Bogarín, sp. nov. (Figures 2 –3) Type:— PANAMA. Chiriquí-Bocas del Toro: Bosque Protector Palo Seco, 8°47’30.4”N 82°12’29.8”W, 1141 m, bosque pluvial premontano, terrestres en bosque secundario a orillas del camino, 3 agosto 2014, Z . Serracín, R. Rincón & D. Bogarín 831 (holotype: UCH!, isotype: PMA!). Among the Sobralia species, S. rinconiana is characterized by the combination of a large plant size that reaches up to 120 cm high with the chartaceous, larger, and wider leaves (27–35 × 14–16 cm), elliptical-lanceolate, acute to acuminate. Among the species of the genus, S. rinconiana is most similar to S. carazoi but differs (apart from its larger size of plants and leaves), in its grayish, papyraceous sheaths (rather than warty and dark) erect conical, acicular, papyraceous flower bracts without spots (instead of erect, narrow, acute, strongly lepidote), the spreading flowers with reflexed petals and the infundibuliform, cream-yellow lip (vs. campanulate, white flowers with an opened lip of S. carazoi) in its grayish, papyraceous sheaths, erect conical, acicular, papyraceous flower bracts without spots, the longer and wider sepals 4.0–4.4 × 0.8–1.0 cm (vs. 2.0 × 0.8 cm) and petals 4.2 × 0.9 cm (vs. 1.70 × 0.45 cm), the cream-yellow lip 3.8 × 2.8 cm (vs. white, 1.3 × 1.6 cm), and the longer, suberect column 2.5 cm long (vs. 1.2 cm). Description:—Erect, terrestrial, large herb 120 cm tall. Roots coarse, fleshy, finely pubescent, 3–5 mm in diameter, and 5-10 cm long. Stem cylindric, round in section, simple, fleshy, erect; up to 85 cm long, 4–5 mm in diameter; bracts, tubular papyraceous, not lepidote, foliate in the upper third, covered by adpressed, green, sparsely subscarious sheaths, becoming papyraceous with age. Leaves plicate, sessile, on a clasping vaginate base, chartaceous, ellipticlanceolate, acute, 3–5 per stem, 27–35 × 14–16 cm, with 9 –11 veins; the uppermost leaf smaller, petiolate, subtending the inflorescence, 7.5–9.0 × 4–5 cm. Inflorescence terminal, developed from a conical cluster of imbricating bracts, successively several-flowered, with a single flower, opened at once, floral bracts acuminate, papyraceous, 1.5–2.0 cm. Floral bracts conical, 2 cm long, acicular, papyraceous. Flowers ephemeral, white, with a cream-yellow lip throat, the lip base reddish tinged, the apex white, membranaceous, to 8.2 cm in diameter. Dorsal sepal elliptic-lanceolate, suberect, conduplicate, dorsally unicarinate, mucronate, entire, 4.0–4.4 × 0.8–1.0 cm. Lateral sepals elliptic to oblong, spreading, conduplicate, dorsally unicarinate, mucronate, entire, 4.0–4.2 × 0.8–0.9 cm. Petals white, ellipticlanceolate, reflexed, spreading, acute, 4.2 × 0.9 cm. Lip infundibuliform, obscurely 3-lobed, oblong, retuse, erect, the base encircling the column, the distal margins spreading, crispate, 3.8 × 2.8 cm, the base of the lamina with two divergent calli. Column hemiterete-subclavate, slightly arched, 2.5 × 0.4 cm, the apex with two acute arms, with two prominent keels at the middle. Anther and stigma ventral. Anther cap cucullate, translucent, rounded, 2-celled, 2 mm in diameter. Pollinia 4, soft, mealy, in two symmetrical pairs of different size, not sharply distinct from the caudicles, each hemipollinarium 1 × 2 mm. Distribution and Ecology:—Only known from Bosque Protector de Palo Seco, Fortuna along the Cordillera de Talamanca in western Panama. It grows as terrestrial on the roadside secondary forest at 1141 m of elevation (Figure 4). Plants were recorded in flower in August. Etymology:—Dedicated to Prof. Rafael Rincón, Director of the Herbarium UCH of Universidad Autónoma de Chiriquí (UNACHI), Panama, in recognition of his contributions to the flora of Panama and who encouraged us to study this Sobralia. Conservation status:— It has not been formally assessed, however, it should be considered data deficient (DD) because more data on population and distribution is needed for a proper assessment. Taxonomic Discussion:—the most conspicuous characteristic of S. rinconiana is the plant size that reaches up to 120 cm high and its large elliptical-lanceolate, chartaceous, acute to acuminate leaves 30–35 × 14–16 cm. Sobralia rinconiana is similar to S. carazoi C.H.Lankester & Ames (1924: 34) but vegetatively differs (apart from its larger size of plants and leaves) in its grayish, papyraceous sheaths (rather than warty and dark) erect conical, acicular, papyraceous flower bracts without spots (instead of erect, narrow, acute, strongly lepidote), the longer and wider sepals 4.0–4.4 × 0.8–1.0 cm (vs. 2.0 × 0.8 cm) and petals 4.2 × 0.9 cm (vs. 1.70 × 0.45 cm), the cream-yellow lip 3.8 × 2.8 cm (vs. white, 1.3 × 1.6 cm), and the longer, suberect column 2.5 cm long (vs. 1.2 cm). The habit of S. rinconiana is similar to other species such as S. chrysostoma Dressler, S. leucoxantha Reichenbach.f. (1866: 86), S. undatocarinata C.Schweinfurth (1938: 197), S. violacea Linden ex Lindley (1846: 133), and S. warszewiczii Reichenbach (1852: 714) characterized by stems over 100 cm tall, with conspicuous floral bracts forming an imbricating cone; however, the leaf of the new species is larger than the rest of the Sobralia currently registered in Panama. The leaf size of the species similar in plant habit to S. rinconiana is up to 23 cm long and 8 cm wide, contrasting with the leaf of S. rinconiana, which is greater than 30 long and 14 cm wide. Two peculiar characteristics of S. rinconiana are the small flower size in proportion to the plant height and leaf width. These two morphological features are present at least in S. carazoi, S. doremiliae Dressler (1995: 142), and S. valida Rolfe (1909: 65). However, the new species shows spreading flowers with reflexed petals from the middle to the apex. In addition, the infundibuliform, cream-yellow lip contrasts to the campanulate, white flowers with an opened lip of S. carazoi and S. doremiliae. Another similar species, Sobralia valida, shows smaller and narrower leaves (12–20 × 6.0– 8.5 cm) and the lip with crested veins and a yellow band becoming deep orange in front (Rolfe 1909). These characters contrast to the two basal keels not extending along the cream-yellow lip of S. rinconiana.Published as part of Serracín, Zuleika, Samudio, Zabdy & Bogarín, Diego, 2022, A new Sobralia (Orchidaceae: Sobralieae) from Panama, pp. 81-87 in Phytotaxa 559 (1) on pages 83-86, DOI: 10.11646/phytotaxa.559.1.9, http://zenodo.org/record/700944
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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