Holotype species: Terpsinoë musica Ehrenberg
Original publication and holotype designation: Ehrenberg, C.G. (1843). Verbreitung und Einfluss des mikroskopischen Lebens in Süd- und Nord-Amerika. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1841: 291-445 + [1, Berichtigungen], + 4 pls.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Nikolaev, V.A., Kociolek, J.P., Fourtanier, E., Barron, J.A. & Harwood, D.M. (2001). Late Cretaceous diatoms (Bacillariophyceae) from the Marca Shale member of the Moreno Formation, California. Occasional Papers of the California Academy of Sciences 152: -119, 39 pls.
Description: Cells tabular, notched, with conspicuous pseudosepta in girdle view; markedly elongate, undulate in valve view. Plastids not observed. Forming epiphytic zig-zag colonies in brackish/freshwater' often on wet rock faces in tropical regions. Valves tri-undulate with narrowed slightly capitate apices ending in finely porate psedocelli. Valve mantle sharply downturned. Valve surface corrugated with irregularly sized and spaced areolae; no obvious annulus. Corrugation somewhat thicker between valve face and mantle and finer on valve mantle. An inconspicuous indentation occurs where the rimoportula opens. Internally with conspicuous pseudosepta between constructions; sometimes other lesser developed pseudosepta present especially near apices; irregularly porate with an off-centre rimoportula in the central inflation. Rimoportula with an S-shaped slit. Copulae several, plain and complete.The most recent alteration to this page was made on 9 Dec 2015 by M.D. Guiry.
Comments: Terpsinoë is a very distinctive genus with a very precise ecological distribution. Its structure and ecology are very close to that of its relative Hydrosera, cf. the valve surface, pseudocelli, pseudosepta and rimoportula. In girdle view the pseudosepta resemble musical notation - presumably the derivation of the specific epithet of the type. The study of auxospores of T. musica by Müller (1889) is one of the earliest and illustrates the intimate relationship between the initial hypovalve and the mother cell.
Numbers of names and species: There are 27 species names in the database at present, as well as 4 infraspecific names. Of the species names, 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: 12 May 2003 by Andy Taylor
Verified by: 09 December 2015 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=46539
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 July 2021.