156,052 species and infraspecific names are in the database, 21,990 images, 60,316 bibliographic items, 443,172 distributional records.

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

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Halymeniales
Family Tsengiaceae

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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Taxonomic status: currently recognized as a distinct genus.

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.

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 27 Sep 2018 by M.D. Guiry.

Numbers of names and species: There are 10 species names in the database at present, of which 10 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 28 December 2000 by M.D. Guiry

Verified by: 24 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33232

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 26 August 2019.

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