N'Yeurt Antoine auteur aut IRD Payri Claude auteur aut IRD text journalArticle eng text/pdf born digital access A new genus and species of red alga in the Rhodymeniaceae, Grammephora peyssonnelioides, is described from both shallow and deepwater habitats in the Solomon Islands, South Pacific. The new genus and species is characterized by prostrate overlapping lobes with a strongly cartilaginous flexible texture, distinct surface linear markings perpendicular to the growing margins, and a compact three to four celled medulla of relatively small refractive cells. Tetrasporangia are elongate and decussately divided, and occur in large scattered dorsal surface sori. Cystocarps are prominent and conical, on the dorsal surface of the blade, with a network of nutritive filaments and basal nutritive tissue around the suspended, centrally located carposporophyte, with all gonimoblast initials becoming carposporangia. The columnar fusion cell is uniquely crowned by a ring of discoid cells of nonalgal origin. specialized Grammephora peyssonnelioides gen. et sp nov. morphology new genus new species reproduction Rhodophyta Rhodymeniaceae Solomon Islands taxonomy 034 076 55 4 286-294 2007 1322-0829 https://www.documentation.ird.fr/hor/fdi:010040909 10.1111/j.1440-1835.2007.00473.x 1322-0829 [F B010040909] https://www.documentation.ird.fr/hor/fdi:010040909 https://www.documentation.ird.fr/intranet/publi/2008/01/010040909.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-02-22 2017-08-23 fdi:010040909 fre