Abstract
:We conducted phylogenetic analyses of plastid rbcL sequences and detailed observations on female reproductive structures of foliose halymeniacean red algae collected in Chile and Peru. We describe Ramirezia osornoensis gen. et. sp. nov., characterised by having seven-celled carpogonial branches and six-celled auxiliary-cell branches, formation of primary connecting filaments after fertilisation, nutritive filaments mostly upwardly directed and well-developed pericarps. It was distributed from central Chile to the Falkland Islands. The female structures of Halymenia lapathifolia Kützing and its placement in the rbcL tree indicated that it belonged to a new genus, which we named Ramirezia. In the rbcL phylogeny, Ramirezia consistently formed a clade with Chilean/Peruvian species. We described Phyllymenia acletoi sp. nov. on the basis of specimens from Peru. Phyllymenia acletoi had a distinctive rbcL phylogeny and Phyllymenia-type female structures. It was characterised by thalli divided into several lobes, a loose cortex of five to seven layers of cells with stellate inner cortical cells, a gradual transition from cortex to lax medulla and pericarps with few involucral filaments.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
