RT info:eu-repo/semantics/article
T1 Observations on reproductive morphology and new records of Rhodomelaceae (Rhodophyta) from the Canary Islands, including Veleroa complanata sp. nov.
A1 Afonso Carrillo, Julio
A1 Rojas González, Berta
A2 BotánicaEcología y Fisiología Vegetal
A2 Botánica Marina
AB Polysiphonia funebris and P. tenerrima are examined mainly in relation to their vegetative and reproductive features. In P.funebris the procarps and cystocarps are described for the first time, and it is confirmed that the species exhibits all thevegetative and reproductive features presently used in the del ineation of the genus Polysiphonia. The mainly MediterraneanP. tenerrima is reported for the first time in the Atlantic Ocean. This epi-endophyte on Nemalion helminthoides has ecorticateaxes with four peri central cells, abundant trichoblasts spirally ananged, rhizoids cut off from pericentral cells, tetrasporangiaproduced in spiral series and apparently three-celled carpogonial branches, all diagnostic characters of the genus Neosiphonia.Tetrasporangial plants in the western Atlantic species Dipterosiphonia reversa are described for the first time from a collection that represents the first record of this species in the eastern Atlantic Ocean. Tetrasporangia are produced (one persegment) in short linear series in pinnate laterals, with fertile segments consisting of five pericentral cells; the fertilepericentral cell cuts off two sporangial cover cells. Veleroa complanata Afonso-Carrillo & Rojas-Gonzalez sp. nov., knownonly from Tenerife in the Canary Islands, is unique among species of the genus Veleroa because of its progressivelycorticated polysiphonous axes and its two different types of spirally arranged, determinate, pigmented, persistent trichoblasts.These are unbranched in prostrate and fertile portions of erect axes, but branched, with up to eight alternate-distichouscomplanate laterals, in vegetative erect axes. A comparative table of the morphological attributes of the species cunentlyaccepted in Veleroa is given.
YR 2004
FD 2004
LK http://riull.ull.es/xmlui/handle/915/27262
UL http://riull.ull.es/xmlui/handle/915/27262
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DS Repositorio institucional de la Universidad de La Laguna
RD 08-nov-2024