Discoaster backmanii

Agnini et al., 2008 Sept 14, 2026

Set number: 4541

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10µm

Discoaster backmanii, Late Paleocene, ODP Leg 129, Site 801A, Pigafetta Basin, Pacific Ocean

Set number: 4540

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Discoaster backmanii, Late Paleocene, DSDP Leg 25, Site 245, Mozambique Channel (Davie Ridge), Indian Ocean

Final Epithet

Discoaster backmanii Agnini et al., 2008

Basionym

Discoaster backmanii Agnini et al., 2008

References

Agnini, C., Fornaciari, E. & Raffi, I. 2008. Three new species of calcareous nannofossil from Late Palaeocene and Early Eocene assemblages (Ocean Drilling Program Site 1262, Walvis Ridge, SE Atlantic Ocean). Journal of Nannoplankton Research 30(1): 51-56.

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)

59.24? - 56.00