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http://hdl.handle.net/2183/24444 Variabilidad morfológica de Jania longifurca (Corallinales, Rhodophyta) en Galicia (noroeste de España)
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Lugilde J., Bárbara I. & Peña V. 2019. Variabilidad morfológica de Jania longifurca (Corallinales, Rhodophyta) en Galicia (noroeste de España). Anales del Jardín Botánico de Madrid 76 (1): e079. https://doi.org/10.3989/ajbm.2512
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Abstract
[Resumen] En los fondos de maerl de Galicia se detectó material de
Jania J.V.Lamour. con una morfología distinta de la típica atribuida a
J. longifurca Zanardini y J. rubens (L.) J.V.Lamour. —únicas especies
citadas en este hábitat en Galicia—. Esta consiste en: intergenículos
delgados, ramificación dicotómica irregular y discos secundarios que
facilitan la refijación al substrato, caracteres congruentes con los de otras
especies de Jania de distribución más meridional. No obstante, el estudio
taxonómico integrador de este material y de otras recolecciones de hábitat
rocoso confirmó su identificación como J. longifurca. Así, la morfología
atípica con intergenículos delgados y discos secundarios de fijación es
dominante en ejemplares de J. longifurca procedentes de fondos de maerl,
mientras que los ejemplares de ambientes rocosos presentan los típicos
intergenículos robustos. Por otra parte, análisis moleculares detectaron
cierta afinidad filogenética de J. longifurca con ejemplares de Nueva
Zelanda, donde esta especie no está citada. Se concluye entonces que la
variación morfológica en J. longifurca está relacionada con el ambiente
y se evidencia la necesidad de estudios moleculares para esclarecer
la taxonomía de este género, que está basada fundamentalmente en
caracteres morfológicos.
[Abstract] Material of Jania J.V.Lamour. with a different morphology from the typical one attributed to J. longifurca Zanardini and J. rubens (L.) J.V.Lamour.—the only species in this habitat in Galicia—has been detected in the maerl beds of Galicia. This morphology consists on: thin intergenicula, an irregular pattern of dichotomies and secondary attachment discs that facilitate the refixation to the substrate, all of them similar to those of other southern species of Jania. Nevertheless, the integrative taxonomic study of this material and other collections from rocky habitat confirmed its identification as J. longifurca. Thereby, the atypical morphology with thin intergenicula and secondary attachment disc is dominant in samples of J. longifurca from maerl beds, while the samples from rocky environments showed the typical robust intergenicula. Moreover, molecular analysis resolved some phylogenetic affinities with samples from New Zealand, where this species is not recorded. It is concluded therefore the morphological variation related to the environment and it is evident the need of molecular studies to clarify this genus taxonomy, which is based fundamentally on morphological characters.
[Abstract] Material of Jania J.V.Lamour. with a different morphology from the typical one attributed to J. longifurca Zanardini and J. rubens (L.) J.V.Lamour.—the only species in this habitat in Galicia—has been detected in the maerl beds of Galicia. This morphology consists on: thin intergenicula, an irregular pattern of dichotomies and secondary attachment discs that facilitate the refixation to the substrate, all of them similar to those of other southern species of Jania. Nevertheless, the integrative taxonomic study of this material and other collections from rocky habitat confirmed its identification as J. longifurca. Thereby, the atypical morphology with thin intergenicula and secondary attachment disc is dominant in samples of J. longifurca from maerl beds, while the samples from rocky environments showed the typical robust intergenicula. Moreover, molecular analysis resolved some phylogenetic affinities with samples from New Zealand, where this species is not recorded. It is concluded therefore the morphological variation related to the environment and it is evident the need of molecular studies to clarify this genus taxonomy, which is based fundamentally on morphological characters.
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Atribución 4.0 España








