Triparma B.C.Booth & H.J.Marchant, 1987
Holotype species: Triparma columacea B.C.Booth
Original publication and holotype designation: Booth, B.C. & Marchant, H.J. (1987). Parmales, a new order of marine chrysophytes, with descriptions of three new genera and seven new species. Journal of Phycology 23: 245-260.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Ichinomiya, M., Lopes dos Santos, A., Gourvil, P., Yoshikawa, S., Kamiya, M., Ohki, K., Audic, S., Vargas, C. de, Noël, M.-H., Vaulot, D. & Kuwata, A. (2016). Diversity and oceanic distribution of the Parmales (Bolidophyceae), a picoplanktonic group closely related to diatoms. ISME Journal 10: 2419-2434, 5 figs.
Description: Cell small, 3-5 &m in diam. Cell wall of 8 plates: 3 small round plates (shield plates), one large round plate (ventral plate), one triradiate plate and 3 oblong girdle plates. Plates smooth, striate, reticulate, or papillate. Triradiate plates may be keeled, and girdle plates keeled, winged or spinous. One bi-lobed, cup-shaped chloroplast without a pyrenoid. Chloroplast with lamellae made up of 3 thylakoids and a peripheral girdle lamella. Chloroplast enclosed by a cisterna of endoplasmic reticulum. Mitochondrion large with indistinct cisternae. One small Golgi body. Nucleus central to the chloroplast and appressed to it. Outer nuclear envelope apparently confluent with chloroplast envelope. Reproduction has not been observed to date. Triparma occurs with Tetraparma primarily in waters of the open ocean, ice-influenced coastal waters and other northern coastal waters. One observation has been made in the Bay of Bothnia (inner Baltic Sea), and large populations occurred in Sanich Inlet, British Columbia, Canada. Major populations occur in the subarctic Pacific and Antarctic oceans. Single observations from the Indian Ocean and the California Current. The genera Tetraparma and Pentalamina are closely related to Triparma. The most abundant and widespread genus of the Parmales, which contains planktonic marine cells with cell walls composed of a small number of siliceous plates of various shapes all fitting together edge to edge.
Information contributed by: B. Booth. The most recent alteration to this page was made on 3 Nov 2016 by M.D. Guiry.
Comments: Description emended by Konno & Jordan (2007: 615).
Numbers of names and species: There are 8 species names in the database at present, as well as 14 infraspecific names. Of the species names, 11 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: 27 May 2002 by Elizabeth Moran
Verified by: 03 November 2016 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44845
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 18 September 2018.