Periphykon Weber-van Bosse, 1929

Holotype species: Periphykon beckerae Weber Bosse

Original publication and holotype designation: Weber-van Bosse, A. (1929). Sur un nouveau genre de Floridés. Annales de Cryptogamie Exotique 2: 255-261, 8 figs.

Description: Thallus blade-like, prostrate, attached by clusters of rhizoids forming multicellular holdfasts on the ventral surface. Structure dorsiventral, formed by laterally coherent polysiphonous axes, these initially with 4 pericentral cells, of which the dorsal 2 divide once longitudinally, then twice transversely to form 8 small pericentrals from each original cell. Trichoblasts absent on vegetative thallus, present on male and female reproductive structures. Reproductive organs borne on small erect terete cylindrical fertile branchlets occurring singly or in sori on the dorsal surface. Spermatangial branches placentiform, with central sterile cells and a short stalk. Procarps distal on fertile branchlets. Cystocarps spherical to ovoid. Tetrasporangia 1 per segment, spirally arranged in the branchlet.

Information contributed by: Huisman (2018). The most recent alteration to this page was made on 2018-10-10 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=42518

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 October 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024