Ancylonema Berggren, 1872

Holotype species: Ancylonema nordenskioeldii Berggren

Original publication and holotype designation: Berggren, S. (1872). Bidrag till kännedomen om Fanerogamfloran vid Diskobugten og Auleitsivikfjorden på Grönlands vestkuste. Öfversigt af Förhandlingar Kongl. Vetenskaps-akademiens 1871: 853-897.

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Description: Cells loosely united into short filaments up to 16 cells. Cells cylindrical, with rounded or truncate (in filament) ends. Cells small to medium sized (16-40 µm long, 8-12 µm wide), with smooth cell walls and purple or reddish violet cell sap. Chloroplast narrow axial or parietal band, with 1 or 2 pyrenoids. Asexual reproduction unknown, but transverse cell division and fragmentation of filaments presumed. Sexual reproduction by conjugation with formation of conjugation tube between gametangia. Gametes move into conjugation tube and fuse to form zygote, mature zygospore thick-walled, spherical.

Information contributed by: J.F. Gerrath; modified by M.D. Guiry. The most recent alteration to this page was made on 2013-05-07 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Guiry, M.D. (2013). Taxonomy and nomenclature of the Conjugatophyceae (=Zygnematophyceae). Algae. An International Journal of Algal Research 28: 1-29.

Comments: Ancylonema known only from permanent patches of snow and ice, where it may cause brown to violet coloration; also found amongst red snow algae. Recorded from Greenland and other Arctic islands, western North America, Switzerland and Antarctica.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47152

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 May 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 December 2024