Reticulofenestra pseudoumbilicus

(Gartner, 1967a) Gartner, 1969b May 20, 2021

Set number: 1044

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10µm

Reticulofenestra pseudoumbilica, Middle Miocene, Malta

Set number: 1042

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10µm

Reticulofenestra pseudoumbilica, Middle Miocene, Malta

Set number: 1041

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10µm

Reticulofenestra pseudoumbilica, Middle Miocene, DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean

Set number: 1040

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10µm

Reticulofenestra pseudoumbilica, Middle Miocene, ODP Leg 154, Site 925C, Ceara Rise, Equatorial Atlantic Ocean

Set number: 1039

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10µm

Reticulofenestra pseudoumbilica, Late Miocene, Gulf of Mexico

Set number: 1038

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10µm

Reticulofenestra pseudoumbilica, Late Miocene, DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean

Set number: 1037

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10µm

Reticulofenestra pseudoumbilica, Middle Miocene, Malta

Set number: 1053

Reticulofenestra pseudoumbilicus

Fig 1. Malta, Middle Miocene, Coccosphere: 11.0µm, Coccoliths: 8.3µm; Fig 2. Malta, Middle Miocene, 8.0µm; Fig 3. Silifke, Turkey, Middle Miocene, 9.2µm; Fig 4. Malta, Middle Miocene, 9.0µm

Set number: 1054

Reticulofenestra pseudoumbilicus

Fig 1. Antakya, Hatay, Turkey, Middle Miocene, 8.0µm; Fig 2. Adana Basin, Late Miocene, 8.4µm; Fig 3. Antalya-Manavgat Road, Turkey, Late Miocene, 8.5µm; Fig 4. Antalya-Manavgat Road, Turkey, Late Miocene, 9.4µm; Fig 5. Antalya-Manavgat Road, Turkey, Late Miocene, 8.4µm; Fig 6. Antalya-Manavgat Road, Turkey, Late Miocene, 9.2µm; Fig 7. Antalya-Manavgat Road, Turkey, Late Miocene, 8.2µm; Fig 8. Adana Basin, Turkey, Late Miocene, 9.5µm;

Final Epithet

Reticulofenestra pseudoumbilicus (Gartner, 1967a) Gartner, 1969b

Basionym

Coccolithus pseudoumbilicus Gartner, 1967a

Remarks

Large (>8.0 μm) elliptical species of Reticulofenestra possess the following features:
• The distal shield is larger than the proximal shield.
• The void central area is surrounded by a tube cycle of variable width.
• The diameter of the central area varies in relation to the width of the pelaga.

Its optical properties, including inclined dextrogyre extinction lines (with angles typically around 9° on the distal shield and 77° on the tube cycles on the distal side) and length-fast (-) elongation, are consistent with those of the genus Reticulofenestra.

References

Gartner, S. 1967a. Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. University of Kansas Paleontological Contributions, Papers 29: 1-7.

Gartner, S. 1969b. Correlation of Neogene planktonic foraminifera and calcareous nannofossil zones. Transactions of the Gulf-Coast Association of Geological Societies. 19: 585-599.

Taxonomy

Reticulofenestra

Biostratigraphy

Stratigraphic Range

Serravalian - Zanclean

Age (Ma)

12.83 - 3.82

Holotype

Coccolithus pseudoumbilicus Gartner, 1967

Neogene

Sigsbee knolls, Gulf of Mexico.