Ameki Eocene SE Nigeria Lithofacies E: Eocene, Nigeria
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Bendelute conicoturrita
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179 individuals | |||||||||
Crassotrea sp.
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Cancellaridae indet.
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23 individuals | |||||||||
Bagginidae
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Cancris sp.
Monfort 1808
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Rotaliidae
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Rotalia sp.
Lamarck 1804
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Globothalamea
- Rotaliida
- Discorbidae
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Valvulineria sp.
Cushman 1926
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Globothalamea
- Rotaliida
- Cibicididae
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Cibicides sp.
Monfort 1808
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Globothalamea
- Rotaliida
- Nonionidae
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Nonion sp.
Monfort 1808
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Tubothalamea
- Miliolida
- Miliolidae
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Spiroloculina sp.
d'Orbigny 1826
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Tubothalamea
- Miliolida
- Hauerinidae
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Quinqueloculina sp.
d'Orbigny 1826
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Anthozoa
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Anthozoa indet.
Ehrenberg 1834
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Reptilia
- Testudines
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Testudines indet.
Batsch 1788
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Chondrichthyes
- Myliobatiformes
- Myliobatidae
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Myliobatis sp.
Cuvier 1816
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Chondrichthyes
- Orectolobiformes
- Ginglymostomatidae
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Ginglymostoma sp.
Müller and Henle 1838
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Chondrichthyes
- Lamniformes
- Odontaspididae
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Odontaspis sp.
Agassiz 1838
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Gastropoda
- Turritellidae
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Turritella amekiensis
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2011 individuals | |||||||||
Gastropoda
- Neogastropoda
- Volutidae
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Volutidae indet.
Rafinesque 1815
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24 individuals | |||||||||
Volutocorbis multispinosa
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148 individuals | |||||||||
spelled with current rank as Athleta (Volutocorbis) | ||||||||||
Gastropoda
- Neogastropoda
- Mitridae
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Mitra sp.
Lamarck 1798
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958 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Gastropoda
- Neogastropoda
- Buccinidae
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Pseudoliva sp.
Swainson 1840
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111 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Gastropoda
- Neogastropoda
- Fasciolariidae
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Glyptostyla sp.
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149 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Gastropoda
- Neogastropoda
- Cancellariidae
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Bonellitia amekiensis
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179 individuals | |||||||||
Gastropoda
- Neogastropoda
- Turridae
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Turridae indet.
Swainson 1840
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296 individuals | |||||||||
Amekicythara douvillei
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163 individuals | |||||||||
Eopleurotoma nigeriensis
Newton 1922
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1541 individuals | |||||||||
Surculites ingens
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224 individuals | |||||||||
Gastropoda
- Neogastropoda
- Clavatulidae
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Turricula africana
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503 individuals | |||||||||
Gastropoda
- Neogastropoda
- Conidae
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Conus amekiensis
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111 individuals | |||||||||
Gastropoda
- Strombidae
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Strombidae indet.
Rafinesque 1815
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119 individuals | |||||||||
Gastropoda
- Rostellariidae
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Cyrtulotibia unidigitata
(Newton 1922)
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998 individuals | |||||||||
Gastropoda
- Naticidae
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Naticidae indet.
Guilding 1834
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1 individual | |||||||||
Natica amekiensis
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1044 individuals | |||||||||
Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica sp.
Röding 1798
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123 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Bivalvia
- Nuculanida
- Nuculanidae
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Nuculana sp.
Link 1807
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257 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Bivalvia
- Carditida
- Carditidae
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Glans sp.
Mühfeld 1811
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3106 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Bivalvia
- Pholadida
- Corbulidae
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Varicorbula sp.
Grant and Gale 1931
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403 individuals | |||||||||
spelled with current rank as Corbula (Varicorbula) | ||||||||||
Other genera within family may be included in count. | ||||||||||
Bivalvia
- Cardiida
- Veneridae
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Tivelina sp.
Cossmann 1886
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845 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Bivalvia
- Cardiida
- Tellinidae
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Macoma sp.
Leach 1819
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Bivalvia
- Arcida
- Noetiidae
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Arcopsis sp.
Koenen 1885
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443 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Bivalvia
- Ostreida
- Ostreidae
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Ostrea sp.
Linnaeus 1758
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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523 individuals | |||||||||
Other genera within family may be included in count. | ||||||||||
Thecostraca
- Balanomorpha
- Balanidae
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Balanus sp.
Da Costa 1778
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Ostracoda
- Podocopida
- Trachyleberididae
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Costa sp.
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Togoina sp.
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Buntonia sp.
Howe 1935
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Ostracoda
- Podocopida
- Leguminocythereidae
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Basslerites sp.
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Ostracoda
- Podocopida
- Bythocyprididae
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Bythocypris sp.
Brady 1880
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Ostracoda
- Podocopida
- Candonidae
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Paracypris sp.
Sars 1866
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Ostracoda
- Platycopida
- Cytherellidae
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Cytherella sp.
Jones 1849
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see common names |
Geography
Country: | Nigeria | State/province: | Imo |
Coordinates: | 6.8° North, 7.1° East (view map) | ||
Paleocoordinates: | 1.1° North, 1.2° East | ||
Basis of coordinate: | based on nearby landmark |
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 | ||||
Stratigraphic resolution: | member | ||||
Stratigraphy comments: The Ameki Formation consists of five lithofacies: (A) clay-shale and limstone facies, (B) silty sandstone facies, (C) bioturbated sandstone facies, (D) mudrock facies, and (E) shelly shale facies. This collection includes fossils from samples N9, N10, and N11 of lithofacies E. |
Lithology and environment
Primary lithology: | shelly/skeletal "shale" |
Includes fossils? | Y |
Environment: | marine indet. |
Geology comments: Paleoenvironmental interpretations listed include a sandy mud substrate with a maximum depth of 20m in warm humid normal marine waters that are well oxygenated and locally anoxic. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
Collection excludes: | some genera,some macrofossils,some microfossils |
Collection methods: | field collection |
Reason for describing collection: | paleoecologic analysis |
Taxonomic list comments:Taxonomic list compiled from tables and text. |
Metadata
Database number: | 42655 | ||
Authorizer: | L. Ivany | Enterer: | C. Visaggi |
Modifier: | L. Ivany | Research group: | marine invertebrate |
Collections that are a subset of this one: | |||
Created: | 2004-08-03 12:50:46 | Last modified: | 2005-08-17 16:42:50 |
Access level: | the public | Released: | 2004-08-03 12:50:46 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
11345. | I. Arua. 1988. Paleoecology of the Eocene Ameki Formation of southeastern Nigeria. Journal of African Earth Sciences 7(7/8):925-932 [L. Ivany/C. Visaggi/C. Visaggi] |