Discoaster geometricus

Brönnimann & Stradner, 1960 Sept 14, 2026

Set number: 4539

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10µm

Discoaster geometricus, Late Paleocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Set number: 4538

1
2
3
4
5
6

10µm

Discoaster geometricus, Late Paleocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Set number: 4537

1
2
3
4

10µm

Discoaster geometricus, Late Paleocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Set number: 4536

1
2
3
4

10µm

Discoaster geometricus, Late Paleocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Set number: 4535

1
2
3
4
5
6
7

10µm

Discoaster geometricus, Late Paleocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Final Epithet

Discoaster geometricus Brönnimann & Stradner, 1960

Basionym

Discoaster geometricus Brönnimann & Stradner, 1960

References

Brönnimann, P. & Stradner, H. 1960. Die Foraminiferen- und Discoasteriden-zonen von Kuba und ihre interkontinentale Korrelation. Erdoel-Zeitschrift 76(10): 364-369.

Taxonomy

Discoaster

Neostellates produce interference colours

Neostellates, 3 to 6 long arm, with simple tips

Neostellates, 4 to 6 long arms with bifurcation

Neostellates, 4 to 8 arms with bifurcation

Neostellates, 6 short arms with simple tips

Discoaster stellulus

Neostellates, bulged central area with proximal ridges

Discoaster leios

Neostellates, bulged central area with sutural & proximal ridges

Neostellates, featureless central area with distal ridges

Neostellates, proximal ridges give rise to a third furcation

Neostellates, with distal & proximal knobs

Rosettes, >10 arms

Rosettes, proximal & distal processes, >10 arms

Stellates, 4 to 5 arms with bifurcation

Stellates, 5 to 9 arms with bifurcation & nodes

Discoaster wilcoxonii

Stellates, often curved arms with simple tips

Uncategorised

Biostratigraphy

Stratigraphic Range

Thanetian

Age (Ma)

58.90 - 56.00?