Polysiphonia Greville, 1823, nom. et typ. cons.

Holotype species: Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville

Currently accepted name for the type species: Polysiphonia stricta (Mertens ex Dillwyn) Greville

Original publication and holotype designation: Greville, R.K. (1823). Scottish cryptogamic flora, or coloured figures and descriptions of cryptogamic plants, belonging chiefly to the order Fungi; and intended to serve as a continuation of English Botany. Vol. 2 (fasc. 13-18), pls 61-90. Edinburgh & London: MacLachlan & Stewart; Baldwin, Craddock & Joy.

Description: Thallus tufted, erect or prostrate, with variously branched terete axes. Structure uniaxial with 4–many pericentral cells. Caduceous trichoblasts and branch primordia arising exogenously at the apices, generally 1 per segment in a spiral pattern (but not always present, and when present not always on all segments). Shed trichoblasts leaving a scar cell. Secondary cortication present in some species. Cystocarps lateral on polysiphonous branches, ovoid or spherical, ostiolate. Spermatangia in heads, on fertile trichoblasts or replacing them. Tetrasporangia tetrahedral, spherical, borne in linear series in polysiphonous branches.

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.

Gender: This genus name is currently treated as feminine.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=37461

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 21 November 2024