Ameki Fm: Litho and Fauna - Glans zone: Eocene, Nigeria
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Bendelute sp.
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frequent category | ||||||
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Rectangularca sp.
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scarce category | ||||||
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Bagginidae
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Cancris sp.
Monfort 1808
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Globothalamea
- Rotaliida
- Nonionidae
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Nonion sp.
Monfort 1808
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Globothalamea
- Rotaliida
- Cibicididae
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Cibicides sp.
Monfort 1808
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Globothalamea
- Rotaliida
- Discorbidae
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Valvulineria sp.
Cushman 1926
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Tubothalamea
- Miliolida
- Hauerinidae
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Quinqueloculina sp.
d'Orbigny 1826
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Chondrichthyes
- Lamniformes
- Odontaspididae
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Odontaspis sp.
Agassiz 1838
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Scaphopoda
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Scaphopoda indet.
Bronn 1862
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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v. abundant category | ||||||
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Gastropoda
- Naticidae
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Neverita sp.
Risso 1826
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v. abundant category | ||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Bonellitia sp.
Jousseaume 1887
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frequent category | ||||||
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Gastropoda
- Neogastropoda
- Volutidae
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Volutocorbis sp.
Dall 1890
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frequent category | ||||||
| spelled with current rank as Athleta (Volutocorbis) | |||||||
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Gastropoda
- Neogastropoda
- Clavatulidae
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Surcula sp.
Adams and Adams 1853
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v. abundant category | ||||||
| synonym of Turricula | |||||||
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Gastropoda
- Neogastropoda
- Turridae
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Amekicythara sp.
Eames 1957
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frequent category | ||||||
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Surculites sp.
Conrad 1865
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frequent category | ||||||
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Eopleurotoma sp.
Cossmann 1889
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v. abundant category | ||||||
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Gastropoda
- Rostellariidae
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Cyrtulotibia sp.
Eames 1957
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v. abundant category | ||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula sp.
Lamarck 1799
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scarce category | ||||||
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Bivalvia
- Pholadida
- Teredinidae
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Teredo sp.
Linnaeus 1758
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Bivalvia
- Pholadida
- Corbulidae
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Varicorbula sp.
Grant and Gale 1931
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frequent category | ||||||
| spelled with current rank as Corbula (Varicorbula) | |||||||
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Bivalvia
- Cardiida
- Veneridae
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Chionella sp.
Cossmann 1886
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scarce category | ||||||
| spelled with current rank as Pitar (Chionella) | |||||||
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Sinodia sp.
(Jukes-Brown 1908)
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scarce category | ||||||
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Tivelina sp.
Cossmann 1886
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v. abundant category | ||||||
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Bivalvia
- Cardiida
- Cardiidae
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Fragum sp.
Ršding 1798
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scarce category | ||||||
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Bivalvia
- Lucinida
- Lucinidae
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Phacoides sp.
Blainville 1825
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rare category | ||||||
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Bivalvia
- Carditida
- Carditidae
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Glans sp.
Mühfeld 1811
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v. abundant category | ||||||
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Bivalvia
- Ostreida
- Ostreidae
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Crassostrea sp.
Sacco 1897
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Bivalvia
- Arcida
- Arcidae
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Protonoetia sp.
MacNeil 1938
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frequent category | ||||||
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Bivalvia
- Arcida
- Noetiidae
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Arcopsis sp.
Koenen 1885
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frequent category | ||||||
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Bivalvia
- Arcida
- Glycymerididae
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Africarca sp.
Eames 1957
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rare category | ||||||
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Ostracoda
- Platycopida
- Cytherellidae
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Cytherella sp.
Jones 1849
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Ostracoda
- Podocopida
- Bythocyprididae
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Bythocypris sp.
Brady 1880
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Ostracoda
- Podocopida
- Trachyleberididae
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Togoina sp.
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Buntonia sp.
Howe 1935
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Costa sp.
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Ostracoda
- Podocopida
- Leguminocythereidae
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Basslerites sp.
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Ostracoda
- Podocopida
- Candonidae
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Paracypris sp.
Sars 1866
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Thecostraca
- Balanomorpha
- Balanidae
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Balanus sp.
Da Costa 1778
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Anthozoa
- Scleractinia
- Turbinoliidae
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Turbinolia sp.
Lamarck 1816
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| see common names | |||||||
Geography
| Country: | Nigeria |
| Coordinates: | 5.6° North, 7.5° East (view map) |
| Paleocoordinates: | 0.2° South, 1.5° East |
| Basis of coordinate: | estimated from map |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2-3 | ||
| Key time interval: | Eocene | ||
| Age range of interval: | 56.00000 - 33.90000 m.y. ago |
Stratigraphy
| Formation: | Ameki | Local bed: | 3 |
| Local order: | bottom to top |
Lithology and environment
| Primary lithology: | micaceous,green,blue argillaceous,silty sandstone |
| Secondary lithology: | gypsiferous,micaceous silty "shale" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: consists mainly of laternations of dark blue-green, silty to fine-grained micaceous argillaceous sandstone and dark, silty, fissile, highly micaceous, gypsiferous shales, containing lignite fragments, amber and calcareous nodules | |
| Environment: | lagoonal |
Taphonomy
| Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
| Collection excludes: | some genera |
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:mollusc frequencies: v.abundant>500; frequent 100-500; rare 50-99; scarce 1-49 | |
Metadata
| Also known as: | Lithology and Faunal Composition of the Glans-Quinqueloculina-Bythocypris assemblage zone, Unit 3, Ameki formation | ||
| Database number: | 46260 | ||
| Authorizer: | L. Ivany | Enterer: | P. Wall |
| Modifier: | P. Wall | Research group: | marine invertebrate |
| Created: | 2005-01-09 11:57:23 | Last modified: | 2005-01-09 13:57:23 |
| Access level: | the public | Released: | 2005-01-09 11:57:22 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 12336. | I. Arua and V.R. Rao. 1987. New stratigraphic data on the Eocene Ameki Formation, southeastern Nigeria. Journal of African Earth Sciences 6(4):391-397 [L. Ivany/P. Wall/P. Wall] |