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¿Qué es Riella helicophylla (Sphaerocarpales, Riellaceae)?

Other TitlesWhat is Riella helicophylla (Sphaerocarpales, Riellaceae)?
AuthorsPuche, Felisa; Segarra-Moragues, José G. CSIC ORCID; Sabovljevic, Marko; Infante, M.; Heras, P.
Issue DateJul-2011
PublisherUniversidad de Barcelona
Citation18th Symposium on Cryptogamic Botany (2011)
AbstractDuring the course of a worldwide study on the diversity, evolution and distribution of the genus Riella Mont., we found many populations that keyed to Riella helicophylla. Nonetheless, some of these grouped to morphologically differentiable entities according to some morphological traits of the female gametophytes and the spores. Our aim was to conduct a whole revision of the Mediterranean samples attributed to R. helicophylla and to compare these to the Type material. Achieving this goal, a precise quantification of the morphological and molecular variability of what is considered as R. helicophylla was conducted in an attempt to reveal their taxonomic significance. Taking into account both morphological and molecular evidence a new species of Riella is described as Riella platyspina Puche, Segarra-Moragues, Sabovljevic, Infante & Heras. This species can be distinguished by its undulate wing of the thallus and by the acuminate involucres with closed mouth. Regarding spore morphology R. platyspina has a more densely spinose distal face with about 30 spines projecting at periphery on a single equatorial row. Distal spines of about 10 μm long with truncate flat dilated apices showing a membranous expansion. Proximal face is rugulate with low spines of up to 7 μm with papillose-lacerate apices.
DescriptionPonencia presentada en el 18th Symposium on Cryptogamic Botany celebrada en Barcelona del 13 al 16 de julio de 2011
Appears in Collections:(CIDE) Comunicaciones congresos
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