Ameki Fm: Litho and Fauna - Glans zone (Eocene of Nigeria)

Also known as Lithology and Faunal Composition of the Glans-Quinqueloculina-Bythocypris assemblage zone, Unit 3, Ameki formation

Where: Nigeria (5.6° N, 7.5° E)

• Paleocoordinates: 4.6° S, 7.6° E (Wright 2013)

• coordinate estimated from map

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

Environment/lithology: lagoonal; micaceous, green, blue, argillaceous, silty sandstone and gypsiferous, micaceous, silty shale

• 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

Size classes: macrofossils, mesofossils, microfossils

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 46260: authorized by Linda Ivany, entered by Patrick Wall on 09.01.2005

Creative Commons license: CC0 (CC0)

Taxonomic list

• mollusc frequencies: v.abundant>500; frequent 100-500; rare 50-99; scarce 1-49
Show authors, comments, and common names
unclassified
  -
Bendelute sp., Rectangularca sp.
Globothalamea
 Rotaliida - Nonionidae
Nonion sp.
Nonion sp. de Montfort 1808
 Rotaliida - Cibicididae
Cibicides sp.
Cibicides sp. Monfort 1808
 Rotaliida - Discorbidae
Valvulineria sp.
Valvulineria sp. Cushman 1926
Foraminifera
 Discorbacea - Bagginidae
Cancris sp.
Cancris sp. Monfort 1808
Tubothalamea
 Miliolida - Hauerinidae
Quinqueloculina sp.
Quinqueloculina sp. d'Orbigny 1826
Anthozoa
 Scleractinia - Turbinoliidae
Turbinolia sp.
Turbinolia sp. Lamarck 1816 stony coral
Ostracoda
 Platycopida - Cytherellidae
Cytherella sp.
Cytherella sp. Jones 1849 ostracod
 Podocopida - Trachyleberididae
Costa sp., Togoina sp., Buntonia sp.
Costa sp. ostracod
Togoina sp. ostracod
Buntonia sp. Howe 1935 ostracod
 Podocopida - Leguminocythereidae
Basslerites sp.
 Podocopida - Candonidae
Paracypris sp.
Paracypris sp. Sars 1866 ostracod
 Podocopida - Bythocyprididae
Bythocypris sp.
Bythocypris sp. Brady 1880 ostracod
Thecostraca
 Balanomorpha - Balanidae
Balanus sp.
Balanus sp. Da Costa 1778 barnacle
Bivalvia
 Nuculida - Nuculidae
Nucula sp.
Nucula sp. Lamarck 1799 nut clam
 Arcida - Noetiidae
Arcopsis sp.
Arcopsis sp. Koenen 1885 clam
 Arcida - Glycymerididae
Africarca sp.
Africarca sp. Eames 1957 clam
 Arcida - Arcidae
Protonoetia sp.
Protonoetia sp. MacNeil 1938 clam
 Ostreida - Ostreidae
Crassostrea sp.
Crassostrea sp. Sacco 1897 oyster
 Carditida - Carditidae
Glans sp.
Glans sp. Mühfeld 1811 clam
 Lucinida - Lucinidae
Phacoides sp.
Phacoides sp. Blainville 1825 clam
 Pholadida - Corbulidae
"Varicorbula sp." = Corbula (Varicorbula)
"Varicorbula sp." = Corbula (Varicorbula) Grant and Gale 1931 clam
 Pholadida - Teredinidae
Teredo sp.
Teredo sp. Linnaeus 1758 clam
 Cardiida - Cardiidae
Fragum sp.
Fragum sp. Ršding 1798 cockle
 Cardiida - Veneridae
Tivelina sp., "Chionella sp." = Pitar (Chionella), Sinodia sp.
Tivelina sp. Cossmann 1886 venus clam
"Chionella sp." = Pitar (Chionella) Cossmann 1886 venus clam
Sinodia sp. Jukes-Brown 1908 venus clam
Scaphopoda
  -
Scaphopoda indet.
Scaphopoda indet. Bronn 1862 tusk shell
Gastropoda
 Cerithioidea - Turritellidae
Turritella sp.
Turritella sp. Lamarck 1799 turret shell
 Neogastropoda - Cancellariidae
Bonellitia sp.
Bonellitia sp. Jousseaume 1887 snail
 Neogastropoda - Volutidae
"Volutocorbis sp." = Athleta (Volutocorbis)
"Volutocorbis sp." = Athleta (Volutocorbis) Dall 1890 volute
 Neogastropoda - Turridae
Eopleurotoma sp., Amekicythara sp., Surculites sp.
Eopleurotoma sp. Cossmann 1889 turrid
Amekicythara sp. Eames 1957 turrid
Surculites sp. Conrad 1865 turrid
 Neogastropoda - Clavatulidae
"Surcula sp." = Turricula
"Surcula sp." = Turricula Schumacher 1817 snail
 Sorbeoconcha - Rostellariidae
Cyrtulotibia sp.
Cyrtulotibia sp. Eames 1957 snail
 Sorbeoconcha - Naticidae
Neverita sp.
Neverita sp. Risso 1826 moon snail
Chondrichthyes
 Lamniformes - Odontaspididae
Odontaspis sp.
Odontaspis sp. Agassiz 1838 sand tiger shark