Daughter taxa (time control age-window is: 0-800Ma) | Granddaughter taxa | ||||
Discoaster exilis Small central-area; usually with weak distal and proximal bosses; bifurcations acutely angled in plan-view | Discoaster caulifloris Discoaster moorei Discoaster extensus Discoaster discissus Discoaster signus Discoaster apetalus | ||||
Discoaster bollii Similar to D. exilis but with large distal boss, small proximal boss, and wide central-area, and usually smaller (<10µm). | |||||
Discoaster petaliformis Similar to D. exilis but with very large mushroom-shaped distal boss and distinct proximal boss. Central-area narrow. |
Taxonomy:
Farinacci & Howe catalog pages:
Search data:
Lith size: 0->0µm; |
Geological Range:
Last occurrence (top): at top of NN11 zone (100% up, 5.6Ma, in Messinian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NN4 zone (14.91-17.95Ma, base in Burdigalian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
D. exilis group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-10-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1547 Go to Archive.is to create a permanent copy of this page - citation notes |
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