Ameki Eocene SE Nigeria Lithofacies E (Eocene of Nigeria)

Where: Imo, Nigeria (6.8° N, 7.1° E: paleocoordinates 1.1° N, 1.2° E)

• coordinate based on nearby landmark

When: Ameki Formation, Eocene (56.0 - 33.9 Ma)

• 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.

• member-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal shale

• 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.

Size classes: macrofossils, mesofossils, microfossils

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 42655: authorized by Linda Ivany, entered by Christy Visaggi on 03.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list compiled from tables and text.
Show authors, comments, and common names
unclassified
  -
Bendelute conicoturrita, Crassotrea sp., Cancellaridae indet.
Foraminifera
 Discorbacea - Bagginidae
Cancris sp.
Cancris sp. Monfort 1808
 Rotaliacea - Rotaliidae
Rotalia sp.
Rotalia sp. Lamarck 1804
Globothalamea
 Rotaliida - Discorbidae
Valvulineria sp.
Valvulineria sp. Cushman 1926
 Rotaliida - Cibicididae
Cibicides sp.
Cibicides sp. Monfort 1808
 Rotaliida - Nonionidae
Nonion sp.
Nonion sp. Monfort 1808
Tubothalamea
 Miliolida - Miliolidae
Spiroloculina sp.
Spiroloculina sp. d'Orbigny 1826
 Miliolida - Hauerinidae
Quinqueloculina sp.
Quinqueloculina sp. d'Orbigny 1826
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
Reptilia
 Testudines -
Testudines indet.
Testudines indet. Batsch 1788 turtle
Chondrichthyes
 Myliobatiformes - Myliobatidae
Myliobatis sp.
Myliobatis sp. Cuvier 1816 eagle ray
 Orectolobiformes - Ginglymostomatidae
Ginglymostoma sp.
Ginglymostoma sp. Müller and Henle 1838 nurse shark
 Lamniformes - Odontaspididae
Odontaspis sp.
Odontaspis sp. Agassiz 1838 sand tiger shark
Gastropoda
 Cerithioidea - Turritellidae
Turritella amekiensis
 Neogastropoda - Volutidae
Volutidae indet., "Volutocorbis multispinosa" = Athleta (Volutocorbis)
Volutidae indet. Rafinesque 1815 volute
"Volutocorbis multispinosa" = Athleta (Volutocorbis) volute
 Neogastropoda - Mitridae
Mitra sp.
Mitra sp. Lamarck 1798 mitre shell
Other genera within family may be included in count.
 Neogastropoda - Buccinidae
Pseudoliva sp.
Pseudoliva sp. Swainson 1840 true whelk
Other genera within family may be included in count.
 Neogastropoda - Fasciolariidae
Glyptostyla sp.
Glyptostyla sp. snail
Other genera within family may be included in count.
 Neogastropoda - Cancellariidae
Bonellitia amekiensis
 Neogastropoda - Turridae
Turridae indet., Amekicythara douvillei, Eopleurotoma nigeriensis, Surculites ingens
Turridae indet. Swainson 1840 turrid
Eopleurotoma nigeriensis Newton 1922 turrid
 Neogastropoda - Clavatulidae
Turricula africana
 Neogastropoda - Conidae
Conus amekiensis
Conus amekiensis cone shell
 Sorbeoconcha - Strombidae
Strombidae indet.
Strombidae indet. Rafinesque 1815 true conch
 Sorbeoconcha - Rostellariidae
Cyrtulotibia unidigitata
Cyrtulotibia unidigitata Newton 1922 snail
 Sorbeoconcha - Naticidae
Naticidae indet., Natica amekiensis
Naticidae indet. Guilding 1834 moon snail
Natica amekiensis moon snail
 Heterostropha - Architectonicidae
Architectonica sp.
Architectonica sp. Röding 1798 sundial
Other genera within family may be included in count.
Bivalvia
 Nuculanida - Nuculanidae
Nuculana sp.
Nuculana sp. Link 1807 pointed nut clam
Other genera within family may be included in count.
 Carditida - Carditidae
Glans sp.
Glans sp. Mühfeld 1811 clam
Other genera within family may be included in count.
 Pholadida - Corbulidae
"Varicorbula sp." = Corbula (Varicorbula)
"Varicorbula sp." = Corbula (Varicorbula) Grant and Gale 1931 clam
Other genera within family may be included in count.
 Cardiida - Veneridae
Tivelina sp.
Tivelina sp. Cossmann 1886 venus clam
Other genera within family may be included in count.
 Cardiida - Tellinidae
Macoma sp.
Macoma sp. Leach 1819 tellin clam
 Arcida - Noetiidae
Arcopsis sp.
Arcopsis sp. Koenen 1885 clam
Other genera within family may be included in count.
 Ostreida - Ostreidae
Ostrea sp.
Ostrea sp. Linnaeus 1758 oyster
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp.
Dentalium sp. Linnaeus 1758 tusk shell
Other genera within family may be included in count.
Thecostraca
 Balanomorpha - Balanidae
Balanus sp.
Balanus sp. Da Costa 1778 barnacle
Ostracoda
 Podocopida - Trachyleberididae
Costa sp., Togoina sp., Buntonia sp.
Costa sp. ostracod
Togoina sp. ostracod
Buntonia sp. Howe 1935 ostracod
 Podocopida - Leguminocythereidae
Basslerites sp.
 Podocopida - Bythocyprididae
Bythocypris sp.
Bythocypris sp. Brady 1880 ostracod
 Podocopida - Candonidae
Paracypris sp.
Paracypris sp. Sars 1866 ostracod
 Platycopida - Cytherellidae
Cytherella sp.
Cytherella sp. Jones 1849 ostracod