Kallymenia crouaniorum (Kallymeniaceae,Rhodophyta), a new red algal species from the Laminaria hyperborea understorey community |
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Authors: | Marine Robuchon Delphine Gey Myriam Valero Alba Vergés |
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Institution: | 1. UMR7205 Institut Systématique, Evolution, Biodiversité, CNRS, EPHE, MNHN, UPMC, Muséum National d’Histoire Naturelle, case postale N° 39, 57 rue Cuvier, 75231 Cedex 05 Paris, France;2. CNRS, UPMC, UMI 3614 Evolutionary Biology and Ecology of Algae, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Pontificia Universidad Catolica de Chile, Universidad Austral de Chile, Station Biologique de Roscoff, CS 90074, 29688 Roscoff, France;3. UMS2700 Outils et Méthodes de la Systématique Intégrative, CNRS, MNHN, Service de Systématique moléculaire, Muséum National d’Histoire Naturelle, 75231 cedex 05 Paris, France;4. CNRS, UPMC, UMI 3614 Evolutionary Biology and Ecology of Algae, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Pontificia Universidad Catolica de Chile, Universidad Austral de Chile, Station Biologique de Roscoff, CS 90074, 29688 Roscoff, France;5. Universitat de Girona, Department of Environmental Sciences, Faculty of Sciences, 17071 Girona, Spain |
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Abstract: | In this paper we describe Kallymenia crouaniorum Vergés & Le Gall, sp. nov. (Kallymeniaceae), a new marine red alga from the north-eastern Atlantic Ocean. rbcL and LSU sequences of this species, previously misidentified in the field as Kallymenia reniformis, diverged from those of other Kallymenia species by at least 7.5% and 5.2%, respectively. Kallymenia crouaniorum also has a set of distinctive vegetative and reproductive characteristics, including a deeply lacerate frond, a short stipe, dentate margins, large cortical cells up to 110 μm in diameter, highly refractive stellate medullary cells with arms up to 1000 μm in length, and a monocarpogonial branch system. Molecular phylogenies inferred from rbcL and LSU data indicated, albeit with weak support, that this new species is a sister taxon of a lineage encompassing the generitype K. reniformis, as well as most species of Kallymenia included in the phylogenetic analysis. The main morphological characters that delineate monocarpogonial Kallymenia species are presented. Moreover, after reviewing the literature and several herbarium specimens, we found in the Weber-van Bosse Herbarium a specimen collected at Roscoff in August 1894 with the anatomical characters of the species described here, confirming that this newly described species has in fact been overlooked and is not a recent introduction. |
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Keywords: | Gigartinales Kallymenia crouaniorum Kallymenia reniformis Kallymeniaceae north-eastern Atlantic reproduction Rhodophyta taxonomy |
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