Tsengia K.C.Fan & Y.P.Fan, 1962

Holotype species: Tsengia nakamurae (Yendo) K.C.Fan & Y.P.Fan

Original publication and holotype designation: Fan, K.C. & Fan, Y.P. (1962). Studies on the reproductive organs of red algae I. Tsengia and the development of its reproductive systems. Acta Botanica Sinica 10: 187-196, 2 pls [un-numbered pages]. [in Chinese with Enlgish summary]

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Description: Thallus erect, foliose and laciniate, or dichotomously or irregularly pinnately branched, firm to soft and flaccid in texture, often lubricous. Structure multiaxial, with a filamentous medulla and a cortex of subdichotomously or trichotomously branched anticlinal filaments, lacking vesicular cells. Secondary pit connections absent or extremely rare. Gametophytes monoecious or dioecious. Spermatangia arising from outer cells of the cortical filaments. Carpogonial branches 3 (–4)-celled, arising from lower cells of cortical fascicles. Fertilised carpogonia producing 1–4 connecting filaments, these growing directly to an inner cortical auxiliary cell. Gonimoblasts arising directly from auxiliary cells; all cells (except the gonimoblast initial) developing into carposporangia. Tetrasporangia scattered, lateral on cortical filaments, regularly to irregularly cruciate to obliquely divided. Life history triphasic with isomorphic gametophytes and tetrasporophytes [after Womersley & Kraft (1994); Bucher & Norris (2014)].

Information contributed by: Huisman & Saunders (2018).. The most recent alteration to this page was made on 2020-10-01 by Salvador Valenzuela Miranda.

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

Most recent taxonomic treatment adopted: Saunders, G.W. & Kraft, G.T. (2002). Two new Australian species of Predaea (Nemastomataceae, Rhodophyta) with taxonomic recommendations for an emended Nemastomatales and expanded Halymeniales. Journal of Phycology 38: 1245-1260.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=33232

Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 01 October 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024