Terpsinoë Ehrenberg, 1843
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.
Request PDFDescription: 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 2023-10-18 by M.D. Guiry.Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as feminine.
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: 1-119, 39 plates.
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.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=46539
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 18 October 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
