Holotype species: Syringoderma abyssicola (Setchell & N.L.Gardner) Levring
Currently accepted name for the type species: Microzonia abyssicola (Setchell & N.L.Gardner) Camacho & Fredericq
Original publication and holotype designation: Levring, T. (1940). Die Phaeophyceengattungen Clanidophora, Distromium und Syringoderma. Kungliga Fysiografiska Sällskapets i Lund Förhandlingar 10(20): 217-227, 5 figs.
Taxonomic status: currently regarded as a synonym of Microzonia.
Most recent taxonomic treatment adopted: Camacho, O., Sauvage, T. & Fredericq, S. (2018). Taxonomic transfer of Syringoderma to Microzonia (Syringodermataceae, Syringodermatales), including a new record of Microzonia floridana comb. nov. for the Gulf of Mexico. Phycologia 57(4): 413-421, 12 figs.
Description: Sporophytes fan-shaped blades 1-4 cm tall at maturity, growing by a margin of apical cells, attached by downgrowing rhizoids, increasing in breadth by longitudinal division of apical cells. Blades monostromatic or becoming distromatic by longitudinal division of subapical cells, in transverse section appearing as laterally adherent cylindrical filaments. Cells containing numerous small, discoid chloroplasts without pyrenoids. Reproduction by unilocular sporangia borne sessile or pedicellate on the dorsal surface of the blades, in S. abyssicola among short simple filaments with apical growth arising perpendicular to the blade surface; or (in S. australe) unilocs borne on short-branched filaments arising from the dorsal surface of the blades. Spores from unilocs germinating in situ and developing without vegetative growth into 4-celled gametophytes, all 4 cells released as biflagellate gametes (S. abyssicola); or spores released from sporangia but scarcely motile and germinating on or near the sporangial walls, developing without vegetative growth into 2-celled gametophytes, both cells released as gametes (S. floridana); or spores released and developing into prostrate, filamentous, free-living gametophytes bearing small, round, few-chambered plurilocular gametangia [S. phinneyi, S. australe (?)].
Information kindly contributed by E.C. Henry with minor update by M.D. Guiry but may now be outdated.
Comments: Marine, widely distributed but not often collected, occurring from the intertidal (one collection) to 10-70 m, Japan (Hokkaido), Strait of Tatar, Russia; British Columbia to California; Antarctic Peninsula to South Georgia; Florida, Canary Is. and Cape Verde Is.
Numbers of names and species: There are 5 species names in the database at present.
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: 12 July 2018 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=41274
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 24 April 2019.