Distinguishing features: Asymetric 5-rayed discoaster with bifurcations.
Farinacci & Howe catalog pages: Discoaster moorei * ,
Morphology remarks: Asymetric 5-rayed specimens occur occasonally with nearly all 6-rayed discoasters and it is likely that this is not a genuine species but rather a variant of D. deflandrei and D. exilis. It is, however, commonly identified.
|Tags||LITHS: nannolith-radiate, asymmetric, star-shaped, RIM: tips-bifurcate, free-rays-long, |
CSPH: not known, V-UNITS: all, R-UNITS: none, DETAILS: 1ou,
|Metrics||Lith size: 8->18µm; Segments: 5->5; |
Sources: size from OD
Notes: Specimens can occur throughout the Miocene, and even the Oligocene, but more characteristic of the mid Miocene
Last occurrence (top): within NN5 zone (13.53-14.91Ma, top in Serravallian stage). Data source: Perch-Nielsen 1985
First occurrence (base): within NN4 zone (14.91-17.95Ma, base in Burdigalian stage). Data source: Perch-Nielsen 1985
Plot of occurrence data:
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