1,721,117 research outputs found
Pleonosporium australicum G. W. Saunders & C. W. Schneider 2024, comb. nov.
No full text<i>Pleonosporium australicum</i> (Womersley) G.W.Saunders & C.W.Schneider, comb. nov. <p> <i>Spongoclonium australicum</i> Womersley <i>in</i> Womersley & Wollaston, <i>The Marine Benthic Flora of Southern Australia</i>: 293, 296, 297, figs 139, 141A, B (Womersley & Wollaston 1998).</p> <p>TYPE LOCALITY. — Australia, South Australia, Kangaroo Island.</p>Published as part of <i>Schneider, Craig W. & Saunders, Gary W., 2024, Australasian Lophothamnion J. Agardh aligns genetically with Pleonosporium Nägeli (Wrangeliaceae, Spongoclonieae): new species from the western Atlantic, pp. 1-10 in Cryptogamie, Algologie 20 (1)</i> on page 3, DOI: 10.5252/cryptogamie-algologie2024v45a1, <a href="http://zenodo.org/record/10526738">http://zenodo.org/record/10526738</a>
Pleonosporium hirtum
No full text<i>Pleonosporium hirtum</i> (Hooker f. & Harvey) <p> <i>Transactions and Proceedings of the New Zealand Institute</i> 37: 393, pl. 27, fig. 1 (Laing 1905). — <i>Callithamnion hirtum</i> Hooker f. & Harvey, <i>Flora Antarctica</i>: 192, pl. 78, fig. 2 (Harvey & Hooker 1845).</p> <p>TYPE LOCALITY. — New Zealand, Auckland Island.</p>Published as part of <i>Schneider, Craig W. & Saunders, Gary W., 2024, Australasian Lophothamnion J. Agardh aligns genetically with Pleonosporium Nägeli (Wrangeliaceae, Spongoclonieae): new species from the western Atlantic, pp. 1-10 in Cryptogamie, Algologie 20 (1)</i> on page 3, DOI: 10.5252/cryptogamie-algologie2024v45a1, <a href="http://zenodo.org/record/10526738">http://zenodo.org/record/10526738</a>
FIG. 3 in Resurrection of Plocamium pusillum Sonder (Plocamiaceae, Rhodophyta) from Australia
No full textFIG. 3. — Morphology of recently collected Plocamium pusillum (all PERTH 09316647): A, pressed specimen showing habit; B, detail of apex showing origin of lateral branches in groups of three; C, section of young branch; D, section of older branch; E, surface view of living material showing prominent refringent vacuoles. These are not visible in preserved or dried material; F, tetrasporangia borne in groups near apices of lateral branches (arrows), not or only slightly distending the bearing branch; G, closer view of tetrasporangia showing biseriate arrangement. Scale bars: A, 1 cm; B, F, 300 µm; C, E, 30 µm; D, G, 60 µm.Published as part of Huisman, John M. & Saunders, Gary W., 2021, Resurrection of Plocamium pusillum Sonder (Plocamiaceae, Rhodophyta) from Australia, pp. 231-239 in Cryptogamie, Algologie 20 (14) on page 237, DOI: 10.5252/cryptogamie-algologie2021v42a14, http://zenodo.org/record/781929
Using molecular data to resolve the taxonomic limits of the genera Callophyllis , Euthora and Pugetia (Kallymeniaceae, Rhodophyta)
No full textCallophyllis is the largest genus in the red algal family Kallymeniaceae and includes over 50 described species. Since its description, there has been considerable debate over the circumscription of this genus relative to related genera. Specifically, the genus Euthora has sometimes been placed in synonymy with Callophyllis , and a number of species of Pugetia have been transferred to Callophyllis. Phylogenetic analyses based on sequences of nuclear large-subunit ribosomal DNA for representatives of the Kallymeniaceae were completed to assess the various taxonomic proposals surrounding Callophyllis , Euthora and Pugetia . Results indicate that the genus Callophyllis (as generally recognized) is polyphyletic. Callophyllis cristata occupies a position in the trees separate from the remainder of Callophyllis species (including the type Callophyllis variegata ), supporting recognition of Euthora as a distinct genus. Callophyllis chilensis and Callophyllis firma group with the type species of Pugetia , Pugetia fragilissima , thus confirming an earlier taxonomic decision to include these species in the latter genus. A discussion of the relative merits of various reproductive versus vegetative features for assigning species among these three genera is provided. Though outside the scope of the current study, relationships among species of Callophyllis sensu stricto must be visited in light of the results. Although the remaining six species of Callophyllis included in the present trees unequivocally form a monophyletic group, two isolates identified as Callophyllis pinnata (from California and Chile) do not group together, illustrating the confusion generated from the morphological variation within this genus. [ABSTRACT FROM AUTHOR]Peer reviewedfinal article publishedCallophyllisPugetiaphylogenymolecular systematicslarge‐subunit ribosomal DNAKallymeniaceaeGigartinalesEuthor
Molecular systematics of the Florideophyceae (Rhodophyta) using nuclear large- and small-subunit ribosomal DNA sequence data
No full textSequence data are presented for approximately 85% of the nuclear large subunit (LSU) rDNA gene for one member of the Bangiophyceae and 47 members of the Florideophyceae, the latter representing all but one of the currently recognized florideophyte orders. Distance, parsimony, and maximum likelihood analyses of these data were used to generate phylogenetic trees, and bootstrap resampling was implemented to infer robustness for distance and parsimony results. LSU phylogenies were congruent with published nuclear small subunit (SSU) rDNA results in that four higher level florideophyte lineages were resolved: lineage 1, containing the order Hildenbrandiales; lineage 2, recovered only under distance analysis, composed of the orders Acrochaetiales, Balliales, Batrachospermales, Corallinales, Nemaliales, Palmariales, and Rhodogorgonales; lineage 3, containing the Ahnfeltiales; and lineage 4, composed of the orders Bonnemaisoniales, Ceramiales, Gelidiales, Gigartinales, Gracilariales, Halymeniales, Plocamiales, and Rhodymeniales. Analyses were also performed on a combined LSU–SSU data set and an SSU-only data set to account for differences in taxon sampling relative to published studies using this latter gene. Combined LSU–SSU analyses resulted in phylogenetic trees of similar topology and support to those obtained from LSU-only analyses. Phylogenetic trees produced from SSU-only analyses differed somewhat in particulars of branching within lineages 2 and 4 but overall were congruent with the LSU-only and combined LSU–SSU results. We close with a discussion of the phylogenetic potential that the LSU has displayed thus far for resolving relationships within the Florideophyceae. [ABSTRACT FROM AUTHOR]Peer reviewedfinal article publishedgroup I intronFlorideophyceaetaxonomysystematicssmall subunit rDNARhodophytared algaemolecular phylogenylarge subunit rDN
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
Large subunit rDNA and rbcL gene sequence data place Petrohua bernabei gen. et sp. nov. in the Batrachospermales (Rhodophyta), but do not provide further resolution among taxa in this order
No full textThe phylogenetic relationship among 12 previously described batrachospermalean taxa and a novel member of the order were investigated using the LSU and rbcL genes separately and in combination. The primary goal of this research was to establish the phylogenetic placement of a previously undescribed freshwater red alga from Chile. The results showed that the new entity with pseudoparenchymatous tube morphology is a member of the Batrachospermales and Petrohua bernabei gen. et sp. nov. is described herein. This is the first record to our knowledge of a Lemanea-like alga from Chile. It would appear that this thallus construction has evolved at least three times in the Batrachospermales and that the switch from a Batrachospermum-like construction to a pseudoparenchymatous construction may be a repeated adaptive response to turbulent waterfall habitats. In addition to providing information about a new freshwater red alga, this study sought to determine whether combining the data from two genes would produce a more robust phylogeny, particularly for intermediate nodes, to resolve familial relationships within the order. As with previous analyses, the Batrachospermales was resolved as a clade and support was high for relationships resolved among relatively recent nodes. Unfortunately, combining the LSU and rbcL data did not have the desired effect of more fully resolving intermediate nodes among the Batrachospermales. [ABSTRACT FROM AUTHOR]Peer reviewedfinal article publishedBatrachospermalesRhodophytarbcLphylogenyPetrohuamolecular systematicslarge subunit rRNAfreshwaterChil
Phylogenetic study of the Nemaliales (Rhodophyta) based on large-subunit ribosomal DNA sequences supports segregation of the Scinaiaceae fam. nov. and resurrection of Dichotomaria Lamarck
No full textGene sequence data have been newly obtained for 18 species in 13 genera of the order Nemaliales (Rhodophyta), allowing for the first time a relatively comprehensive molecular phylogenetic appraisal of the order. The phylogenetic trees generated from these data support the recognition of three families: (i) the Liagoraceae as presently constituted; (ii) a reduced Galaxauraceae includingActinotrichia,Galaxaura (sensu lato), andTricleocarpa; and (iii) a new family, Scinaiaceae, segregated from the Galaxauraceae and including the generaScinaia,Gloiophloea,Nothogenia, and probablyWhidbeyella. The four genera of the Scinaiaceae differ from the newly circumscribed Galaxauraceae in being uncalcified, and having heteromorphic life histories in which the tetrasporophyte is much reduced and filamentous or crustose. This type of life history is found in onlyTricleocarpaof the Galaxauraceae. The results also showGalaxaurato be para/polyphyletic ifActinotrichiaandTricleocarpaare recognized. To remedy this, theGalaxaura marginataspecies complex,Galaxaura diesingiana, andGalaxaura obtusataare removed from the genus and placed in the resurrectedDichotomariaLamarck.Galaxaura marginata, presently thought to be wide-ranging and morphologically variable, is shown to comprise several species. As a consequence,Galaxaura teneraKjellman andBrachycladia australisSonder are removed from the synonymy ofG. marginataand restored as independent species inDichotomariafor South African and Australian isolates, respectively. The Liagoraceae is shown to encompass genera previously placed in the segregate families Nemaliaceae and Dermonemataceae, and the value of the reproductive characters used to define those taxa is discussed. [ABSTRACT FROM AUTHOR]Peer reviewedfinal article publishedDichotomariaScinaiaceae fam. novphylogenyNemalialesLiagoraceaeGalaxaura marginataGalaxauracea
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
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