RT info:eu-repo/semantics/article
T1 Botryocladia chiajeana and Botryocladia macaronesica sp. nov. (Rhodymeniaceae, Rhodophyta) from the Mediterranean and the eastern Atlantic, with a discussion on the closely related genus Irvinea
A1 Afonso Carrillo, Julio
A1 Boisset, Fernando
A1 Rodríguez Prieto, Conxi
A1 Sobrino, Cristina
A1 Tittley, Ian
A1 Neto, Ana Isabel
A2 BotánicaEcología y Fisiología Vegetal
A2 Botánica Marina
AB Specimens from the eastern Atlantic, Mediterranean and Adriatic seas previously reported as Botryocladia chiajeana showeddifferences in morphology, and re-examination of Meneghini’s original collection of Chrysymenia chiajeana (basionym B.chiajeana) revealed that only the Mediterranean and Adriatic specimens are in agreement with the original protologue,whereas plants reported from the eastern Atlantic are recognised here as Botryocladia macaronesica Afonso-Carrillo, Sobrino, Tittley & Neto sp. nov. The vegetative and reproductive morphology of western Mediterranean plants is examinedin detail for the first time, and B. chiajeana is characterised by the following combination of features: solid axes bearingfrequently dichotomously branched vesicles, vesicle walls three layered, outer cortical cells arranged in rosettes, secretorycells borne on modified medullary cells, spermatangia cut off from scattered spermatangial mother cells, cystocarps stronglyprotuberant and tetrasporangia cruciately divided and exposed on the outer cortical layer at maturity. From the Meneghinicollection, a lectotype specimen of C. chiajeana was selected. Botryocladia macaronesica, known so far only from theislands of Azores, Madeira, Canaries and Cape Verde, differs from other Botryocladia species by a unique combination ofsignificant attributes including elongate saccate vesicles, near-continuous cortication of vesicle walls, secretory cells onunmodified medullary cells and completely immersed cystocarps. An analysis of the morphological characters currentlyused for separating Botryocladia from related genera (i.e. Chrysymenia, Gloiosaccion and Irvinea), showed that there isconsiderable overlap between Botryocladia and Irvinea. These genera are presently discriminated mostly by molecularevidence as the supposed morphological characters are shown here to vary considerably within the genus Botryocladia.
YR 2006
FD 2006
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DS Repositorio institucional de la Universidad de La Laguna
RD 01-may-2024