RT info:eu-repo/semantics/article
T1 Distinctive morphological features of Sargassum desfontainesii (Fucales, Phaeophyceae)
A1 Afonso Carrillo, Julio
A1 Díaz Villa, Tania
A1 Sansón Acedo, Marta
A2 BotánicaEcología y Fisiología Vegetal
A2 Botánica Marina
AB Sargassum desfontainesii (Fucales, Phaeophyceae), an Atlantic speciesrecognisable by the unusual shape of blades (filiform and several times forked, instead ofthe typical leaflike laterals of most species of Sargassum) is morphologically re-examined inpopulations from the Canary Islands. Previous descriptions were exclusively based onpressed dried specimens and they are inexact for several diagnostic features. Freshspecimens exhibit (1) primary and secondary branches regularly cylindrical with smoothsurface (never subangular, slightly compressed or spinous), (2) blades exclusively terete(never linear or triquetrous with a central percurrent midrib), (3) vesicles mostly muticous,but vesicles ending in a short coronal blade, or supported on a forked stalk are relativelycommon, and (4) male receptacles longer and more slender than the androgynousreceptacles. Although until now the species has been considered as a genuine member ofthe subgenus Phyllotrichia, Sargassum desfontainesii lacks certain distinctive features, suchas the distichous and compressed primary branches, and the linear, pinnately branchedlower blades. It is suggested that this species should be placed in the subgenus Sargassum,section Malacocarpicae, subsection Cymosae.
YR 2007
FD 2007
LK http://riull.ull.es/xmlui/handle/915/26742
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DS Repositorio institucional de la Universidad de La Laguna
RD 12-nov-2024