Denisea aliquanta

(Bown, 2016) Varol, 2022 Jun 06, 2022

Set number: 526

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

Set number: 525

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

Set number: 520

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Denisea aliquanta, Late Paleocene, Arabian Peninsula (The specific location cannot be disclosed)

Set number: 521

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10µm

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

Set number: 522

1
2
3
4

10µm

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

Set number: 523

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10µm

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

Set number: 524

1
2
3
4

10µm

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

Final Epithet

Denisea aliquanta (Bown, 2016) Varol, 2022

Basionym

Ericsonia aliquanta Bown, 2016

Synonyms

Cycloplacolithella kavaryi Haq, 1971; Invalid according to ICN Art. 35.1

Description

The specimens of Denisea, with a size range between 5.0 μm and 9.0 μm and a wide central area, are assigned to Denisea aliquanta. The diameter of the central area is greater than the width of the pelaga but not twice as much.

Remarks

Denisea aliquanta differs from the similar-sized Denisea subpertusa by having a wider central area than the width of the pelaga. In contrast, the central area diameter is less than the width of the pelaga in Denisea subpertusa. Denisea foramena also has a similar size but differs from Denisea foramena by having a central area at least twice the width of the pelaga. Denisea orbis is distinguished from Denisea aliquanta by being smaller than 5.0 μm, while Denisea constricta, Denisea magna and Denisea polymegalo are larger than 9.0 μm. Denisea polymegalo is further distinguished by having a central area that is at least twice the width of the pelaga, whilst Denisea constricta also further differs by having a narrower central area than the width of the pelaga.

References

Bown, P. R. 2016. Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32.

Varol, O. 2022. Denisea, a new genus of Paleocene calcareous nannofossils. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 304/2 (2022): 159-186.

Taxonomy

Denisea

Biostratigraphy

Stratigraphic Range

Danian - Ypresian

Age (Ma)

62.13 - 52.50?

Holotype

Ericsonia aliquanta Bown, 2016

Middle Paleocene

TDP Site 27, Kimamba Hill, Kilwa, Tanzania.