Gossleriella Schütt, 1892
Holotype species: Gossleriella tropica F.Schütt
Original publication and holotype designation: Schütt, F. (1892). Das Pflanzenleben der Hochsee. Ergebnisse der Plankton-Expedition der Humboldt-Stiftung 1A: 243-314, figs 58-92.
Request PDFDescription: Cells solitary, discoidal with a ring of closely spaced, thick and thin, radiating spines; the spines are all of similar length (approximately half the cell's diameter). Plastids numerous, small platelets. A rather rare tropical marine planktonic genus (see Hargraves, 1976, for some distributional data). Valves circular. Valves face flat; mantle shallow and plain. Areolae in simple radiating rows, visible only at high (SEM) magnification. According to Hargraves (1976) the mantle region is somewhat loculate. Internal vela are present but their form has not yet been determined; internally the areolar openings appear as raised rings but there is probably further detail to be determined. A single rimoportula is present near the centre of the valve. The copulae are more distinctly areolate than the valve; the areolae are in precise quadrate arrangement, each with a central bar (rota). The valvocopula attached to the epivalve bears an external ring which is fimbriate on the abvalvar edge and has deep flask-shaped slits on the advalvar edge. At intervals prominent spines radiate from the abvalvar region of the valvocopula; these are mostly single but at intervals two spines fuse to form a thicker spine. According to Hargraves the ring of spines is not fused with the valvocopula but may have cytoplasmic connections (more likely mucilage connections). There is variation in this ring structure in our samples from different oceans and the final details need to be worked out. In some cells there is also a remarkable internal set of spines. It is not clear how these are formed and we know of no other such internal elaboration in centric genera. However, it is possible that this is a partially formed ring of spines prior to liberation from the cytoplasm; this would be possible only if the structure is initially flexible.
The most recent alteration to this page was made on 2024-04-20 by Salvador Valenzuela Miranda.Taxonomic status: This name is of an entity that is currently accepted taxonomically.
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.
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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=46447
Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 20 April 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 04 May 2024
