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Molecular Phylogenetic Relationships and Morphological Evolution in the Heterosporous Fern Genus Marsilea / Nathalie S. Nagalingum in Systematic Botany, vol. 32, n°1 (Année2007)

Public [article]  inSystematic Botany > vol. 32, n°1 (Année2007) . - pp. 16-25 Titre : Molecular Phylogenetic Relationships and Morphological Evolution in the Heterosporous Fern Genus Marsilea Type de document : texte imprimé Auteurs : Nathalie S. Nagalingum, Auteur ; Harald Schneider, Auteur ; Kathleen M. Pryer, Auteur Année de publication : 2007 Article en page(s) : pp. 16-25 Langues : Anglais (eng) Catégories : [habitats/milieux] 22 - Eaux douces stagnantes [Espèces (in biblio)] Marsilea [Espèces (in biblio)] Marsileaceae Mots-clés : phylogénétique  biologie de la conservation  plante aquatique Résumé : "Using six plastid regions, we present a phylogeny for 26 species of the heterosporous fern genus Marsilea. Two well-supported groups within Marsilea are identified. Group I includes two subgroups, and is relatively species-poor. Species assignable to this group have glabrous leaves (although land leaves may have a few hairs), sporocarps lacking both a raphe and teeth, and share a preference for submerged conditions (i.e., they are intolerant of desiccation). Group II is relatively diverse, and its members have leaves that are pubescent, sporocarps that bear a raphe and from zero to two teeth, and the plants are often emergent at the edges of lakes and ponds. Within Group II, five subgroups receive robust support: three are predominantly African, one is New World, and one Old World. Phylogenetic assessment of morphological evolution suggests that the presence of an inferior sporocarp tooth and the place of sporocarp maturation are homoplastic characters, and are therefore of unreliable taxonomic use at an infrageneric level. In contrast, the presence of a raphe and superior sporocarp tooth are reliable synapomorphies for classification within Marsilea." (source : auteurs) Type de publication : périodique Référence biblio : Nagalingum N., Schneider H., Pryer K., 2007 - Molecular Phylogenetic Relationships and Morphological Evolution in the Heterosporous Fern Genus Marsilea. Systematic Botany, 32 (1) : 16-25. ID PMB : 58983 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=58983 [article]

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The Status and Typification of Phegopteris and Gymnocarpium / John McNeill in Taxon, vol. 34, n°1 (Année 1985)

Public [article]  inTaxon > vol. 34, n°1 (Année 1985) . - pp. 136-156 Titre : The Status and Typification of Phegopteris and Gymnocarpium Type de document : texte imprimé Auteurs : John McNeill, Auteur ; Kathleen M. Pryer, Auteur Année de publication : 1985 Article en page(s) : pp. 136-156 Langues : Anglais (eng) Résumé : "It is concluded that Phegopteris Fée (Thelypteridaceae) is an apparently nomenclaturally superfluous name, because, when published, it included what is now established to be the type of Gymnocarpium Newman. Despite this, Phegopteris is a legitimate name as it has a legitimate basionym; it must, however, be cited as Phegopteris (Presl) Fée. The protologue of the basionym of Gymnocarpium dryopteris does not point to any specimen that could serve as type of that name, and hence of Gymnocarpium Newman (Athyriaceae). Moreover, there is no eligible specimen in the Linnaean collections in London, Stockholm or Paris. There is, however, a Burser specimen at Uppsala with a Bauhin name that is not cited in any Linnaean work. This specimen was determined by Linnaeus in his catalogue of the Burser herbarium as Polypodium dryopteris, the basionym of G. dryopteris, and this is designated as the lectotype. This lectotypification preserves existing usage of both the generic and specific names." Type de publication : périodique Référence biblio : McNeill J., Pryer K., 1985 - The Status and Typification of Phegopteris and Gymnocarpium . Taxon, 34 (1) : 136-156. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=67598 [article]

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