Distinguishing features: Pentaliths rounded, and overlapping irregularly on coccosphere
Original description: Cellulae solitariae globosae aut tenuiter polis curtae, latae 15-18 μ, longae 18-20 µ Coccolithes ejusdem speciei, rotundati, alii super alios cooperentes; constit uti quinque crystallis. Diametros coccolithis 4-6 μ. Crassa paries cellulae et in faciem dracunculi. Uterque chromatophoris parietorum unum pyrenoidum continet. Multi globuli sepositionum. Nec stigma, neque haptonema. Duae flagelles priores pares diametro cellulae. Propagatur cellulae per fissionem in cellulas filias duas.
Farinacci & Howe catalog pages: Braarudosphaera magnei
Morphology: Pentaliths rounded, and numerous pentaliths occur on coccosphere overlapping irregularly. Not recorded since original description, but it was well-documented, by an experienced phycologist. Cells were observed in live samples and chloroplasts are clearly shown in light micrographs, in addition rare cells bore two sub-equal flagella.
|Tags||LITHS: nannolith-radiate, pentagonal, |
CSPH: equant, monomorphic, CROSS-POLARS: T-prominent,
|Metrics||Lith size: 6->8µm; Segments: 5->5; Coccosphere size: 12->16µm; Liths per sphere: 12->12|
Data source notes: lith size (diameter) from OD drawings; csph size calculated from lith size
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:
Plot of occurrence data:
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