D. musicus group


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. musicus 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: (blue => in age window 0-800Ma) Granddaughter taxa
D. sanmiguelensis & variants - distal boss inside central area
A species of the D. sanmiguelensis group with parallel-sided rays and hexagonal central area periphery.

A species of the D. sanmiguelensis group with relatively long rays that taper to form clubbed termi- nations.

A species of the D. sanmiguelensis group with rays that taper and then flare to form clubbed termi- nations.

D. musicus & variants - distal boss ridges extend beyond c area
Similar to D. exilis , but with wide central area and large distal boss, prominent sutural ridges extending between the rays.

A species of the D. musicus group having slender, tapered rays with simple bifurcations

Catinaster-like forms
small to medium sized Catinaster-like species with stem on both proximal and distal sides

Small thick discoaster with small central area, bifurcations nearly touching

Small discoaster with short arms; bifurcations almost touching and thicker than the arms

A thick species of the D. micros group with long rays, nearly flat bifurcations and a featureless central area.

A thick species of the D. micros group with short rays, flat bifurcations and a featureless central area

Taxonomy:

Citation: Discoaster musicus group de Kaenel et al. 2017
Rank: species group

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

Search data:
Tags
MetricsLith size: 0->0┬Ám;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of Tortonian Stage (24% up, 10.6Ma, in Tortonian stage). Data source: Total of range of species in this database
First occurrence (base): in mid part of Langhian Stage (49% up, 14.9Ma, in Langhian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

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


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D. musicus group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-10-2019

Taxon Search:
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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1544 Go to Archive.is to create a permanent copy of this page - citation notes



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