Nannotax3 - ntax_cenozoic - D. exilis group Nannotax3 - ntax_cenozoic - D. exilis group

D. exilis group

Classification: ntax_cenozoic -> Discoasterales -> Discoasteraceae -> Discoaster -> D. exilis group
Sister taxa: D. brouweri group, D. pentaradiatus group, D. quinqueramus group, D. variabilis group, D. exilis group, D. musicus group, D. deflandrei group ⟩⟨ D. nodifer group, D. lodoensis group, D. multiradiatus group, D. araneus group, D. sp.

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 cauliflorus
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 pentabollii
Discoaster quadribollii
Discoaster tribollii

Discoaster petaliformis
Similar to D. exilis but with very large mushroom-shaped distal boss and distinct proximal boss. Central-area narrow.


Citation: Discoaster exilis group de Kaenel et al. 2017
taxonomic rank: species group

Farinacci & Howe catalog pages: Discoaster exilis group [no catalog entry yet]

Search data:
Lith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

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:


de Kaenel, E., Bergen, J. A., Browning, E., Blair, S. A. & Boesiger, T. M. (2017). Uppermost Oligocene to Middle Miocene Discoaster and Catinaster taxonomy and stratigraphy in the circum North Atlantic Basin: Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research. 37(2-3): 215-244. gs O


D. exilis group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-12-2023

Taxon Search:
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Short stable page link: Go to to create a permanent copy of this page - citation notes

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