Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Current identification/main database link: Prymnesium simplex (Gayral and Fresnel 1983) Edvardsen, Eikrem & Probert, in Edvardsen et al., 2011
Compiled data
Extra details from original publication
Editors' Notes
Ecailles internes pluristratifiées, rondes ou ovales, de 0.28-0.36 µm x 0.25-0.27 µm. face proximale ornée de stries radiales. Face distale pourvue de stries radiales et d'un épaississement central; marge très étroite ornée de stries concentriques et résultant d'une inflexion du bord de l'écaille.
Ecailles externes ovales de 0.42 x 0.24 µm en forme de coupe à bord droit, haut de 0.07-0.08 μm; ce bord apparaît souvent replié sur le fond de l'écaille. Face proximale ornée de stries radiales; face distale caractérisée par un épaississement de la partie médiane du grand axe.
Pas de kystes connus.
Cellulae palmelloides circulares vel angulares, 6-7 μm diam. in apicalem visum et 3-4 μm in latere visum magnae. Area diluta media ovalis sub microscopio luminario nudata. Chloroplasti duo vel quatuor fulvi parietales lobati quisque munitus pyrenoides fusiforme immersa duo thylacoidibus percursa. Juvenes cellulae enodes, veteres cellulae granulatissimae. Cellulae mobiles lumine attractae, paulum metabolae, ovoimagnae. Flagella aequalia quam cellulae et haptonema 2 µm longum, tenui parte terminatum. Squamae stratorum interiorum, circulares vel ovales, 0.28-0.36 µm x 0.25-0.27 µm magnae: facies proximalis striis radiantibus ornata; facies distalis striis radiantibus incrassato medio et angustissimo margine ornata; margo ex orae squamae inflexione constitutus et striis concentricis ornatus. Squamae strati exterioris ovales, 0.42- 0.24 μm magnae, cupulatae lateribus rectis, 0.07- 0.08 μm altis. Haec ora saepe squamae fundo esse inflexa apparet. Facies proximalis striis radiantibus ornata. Facies distalis peculiari medio incrassato ornata. Nullae cystae cognitae. HOLOTYPUS: figurae nostrae 19-28.
See also: Dimensions: -6 µm x 3-4 µm. Flagelles de même longueur que la cellule et haptonème long de 2 µm terminé par une partie amincie.;
Gayral, P. & Fresnel, J. (1983a). Platychrysis pienaarii sp. nov. et P. simplex sp. nov. (Prymnesiophyceae): description et ultrastructure. Phycologia. 22: 29-45. gsReferences:
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Platychrysis simplex: Catalog entry compiled by Jeremy Young. Viewed: 17-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=54760 Go to Archive.is to create a permanent copy of this page - citation notes |
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