Amplisiphonia Hollenberg, 1939

Holotype species: Amplisiphonia pacifica Hollenberg

Original publication and holotype designation: Hollenberg, G.J. (1939). A morphological study of Amphlisiphonia a new member of the Rhodomelaceae. Bot Gazette 101: 380-390.

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Description: Prostrate, dorsiventral, polysiphonous thalli, numerous axes, laterally adhaerant, forming a flat, lobed blade. Apices marginal and without trichoblasts, ventral surface with numerous unicellular rhizoids. 5 pericentral cells, uncorticated, 3 dorsal, 2 ventral; axes dichotomously branched forming indistinct veins. Lobes of thallus often overlapping adjacent ones. Reproductive regions marginal, often semi-erect. Tetrasporangia borne in marginal, radiating rows, 1 per segment. Gametangia borne in short fringing, radially orientated branchlets emerging from blade margins. Male capitula conical, with a monosiphonous stalk, radially arranged on branchlet in positions of trichoblasts. Procarpial branchlets polysiphonous, 2 segments long, with a single trichoblast. Cystocarps ovoid to spheroidal.

Information contributed by: R.E. Norris. The most recent alteration to this page was made on 2010-10-06 by M.D. Guiry.

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

Gender: This genus name is currently treated as feminine.

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.

Comments: Lower littoral to subtidal, North American temperate coast, southern Canada to Baja California.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42131

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 18 April 2024