Prymnesium zebrinum

Taxonomy:

Original description: Cellules allongées (10-12 μm x 5.5 μm) de forme semblable à Prymnesium parvum et à extrémité postérieure métabolique. Deux plastes pariétaux jaune vert situés dans le tiers antérieur de la cellule; pyrénoïdes internes, peu visibles. Deux flagelles hétérodynames subégaux (15-16 μ.m) et un haptonème rigide (3 μ.m). Nage en ligne droite, les cellules tournoyant autour de leur grand axe. Cellules couvertes de corps mucifères et revêtues d'écailles de deux types. Écailles proximales plates et circulaires (c. 0.3 x 0.28 μm) formant une à deux couches et à ornementations identiques à celles des écailles proximales de Prymnesium parvum. Ecailles distales elliptiques (c. 0.35 x 0.27 μm) disposées en une seule couche externe: face proximale semblable à celle des écailles plates; face distale munie d'un bord droit (0.05-0.06 μm) perpendiculaire à la surface de l'écaille et garnie de 4-6 barreaux parallèles (0.025-0.03 μm de hauteur) alignés perpendiculairement au grand axe de l'écaille et formés d'un faisceau de fibrilles. Kystes inconnus.

Cellulae elongatae (10-12 x 5.5 μm), eas Prymnesium parvi simulantes, cum parte posterio metabolo. Chromatophora 2 parietalia flavovirentia locata in triente antico cellulae; pyrenoides internae paulum visibiles. Flagella 2 subaequalia heterodynamica (c. 15-16 μm) haptonemaque rigidum (3 μm). Motus natantes recti, gyratione circum axem longitudinalem. Cellulae obtectae corporibus muciferibus et typis squamarum 2 velatae. Squamae proximales applanatae circulares (c. 0.3x 0.28 μ.m) stratis 1-2, cum ornamentis isdem ac eis squamarum applanatarum Prymnesium parvi, Squamae distales ellipticae (c. 0.35 x 0.27 μm) strato externo unico: aspectus proximalis idem ac is squamarum applanatarum; aspectus distalis cum margine (0.05-0.06 μ.m) perpendiculari ad superficiem squamae et ornatus ab 4-6 transtris (0.025-0.03 μm altis) perpendicularibus ad magnum axem squamae, et constatis ex fasciculo fibrillarum. Cystae desunt.

Farinacci & Howe catalog pages: Prymnesium zebrinum

Morphology:

Geological Range:
Last occurrence (top): Extant. Data source:
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Prymnesium

Prymnesium zebrinum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-5-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20405 Go to Archive.is to create a permanent copy of this page - citation notes

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