Bivalvia, Schenck collection, Ameki (Eocene of Nigeria)

Where: Nigeria (5.0° N, 7.5° E: paleocoordinates 0.7° S, 1.4° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Ameki Formation, Lutetian (47.8 - 41.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; green, argillaceous, sandy mudstone and sandstone

• The formation is predominantly greenish-grey clayey sandstone and sandy claystone. It may locally show shaley development or inclusions of white and mottled claystone and sandstone. The typical greenish gray mudstone includes variable amounts of interbedded sandstone.

Size class: macrofossils

Primary reference: A. Chavan. 1938. Un groupe africain de carditidés, Cossmannella Mayer-Eymar. Bulletin de la Société Géologique de France 8(1):3-10 [L. Villier/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60711: authorized by Loic Villier, entered by Loic Villier on 21.05.2006, edited by Jocelyn Sessa

Creative Commons license: CC BY (attribution)

Taxonomic list

• Foraminifera, ostracods, fish, crustaceans, and cephalopods are compiled by Adegoke (1968) as occurring in this formation, no specific locality information is given.
Show authors, comments, and common names
unclassified
  -
Carcharinus nigeriensis
Osteichthyes
 Acipenseriformes -
Cylindracanthus rectus
Cylindracanthus rectus Agassiz 1843 ray-finned fish
Actinopteri
 Acanthopteri - Sphyraenidae
Sphyraena lugardi
Sphyraena lugardi White 1926 barracuda
 Labriformes - Labridae
Crenilabrus eocenicus, Platylaemus nigeriensis, Pseudosphaerodon pycnodoides
 Perciformes - Sparidae
Otolithus (Pagellus) concavus
Otolithus (Pagellus) concavus Frost 1926 perch-like fish
 Acanthuriformes - Sciaenidae
Otolithus (Sciaena) simplex
 Scombriformes -
Scombramphodon woodwardi
 Siluriformes - Claroteidae
Chrysichthys eaglesomei
Chrysichthys eaglesomei White 1926 catfish
 Siluriformes - Ariidae
Otolithus (Arius) africanus, Arius hewardbelli, Otolithus (Arius) amekiensis, Arius kitsoni, Otolithus (Arius) angulatus
Otolithus (Arius) africanus Frost 1926 Ariid catfish
Arius hewardbelli White 1926 Ariid catfish
Otolithus (Arius) amekiensis Frost 1926 Ariid catfish
Arius kitsoni White 1926 Ariid catfish
Otolithus (Arius) angulatus Frost 1926 Ariid catfish
Chondrichthyes
 Myliobatiformes - Myliobatidae
"Myliobatis dixoni" = Aetomylaeus dixoni, "Myliobatis striatus" = Aetomylaeus striatus, Myliobatis toliapicus, Rhinoptera sherborni
"Myliobatis dixoni" = Aetomylaeus dixoni Agassiz 1843 eagle ray
"Myliobatis striatus" = Aetomylaeus striatus Agassiz 1843 eagle ray
Myliobatis toliapicus Agassiz 1843 eagle ray
Rhinoptera sherborni White 1926 cownose ray
 Rhinopristiformes - Pristidae
Pristis hamatus, Pristis mucrodens, Pristis lathami, Propristis schweinfurthi
Pristis hamatus White 1926 sawfish
Pristis mucrodens White 1926 sawfish
Pristis lathami Galeotti 1837 sawfish
Propristis schweinfurthi Priem 1897 sawfish
 Carcharhiniformes - Galeocerdidae
Galeocerdo latidens
Galeocerdo latidens Agassiz 1835 tiger shark
 Carcharhiniformes - Carcharhinidae
Aprionodon amekiensis, Hypoprion overricus
Aprionodon amekiensis White 1926 requiem shark
Hypoprion overricus White 1926 requiem shark
 Lamniformes - Odontaspididae
"Odontaspis koerti" = Brachycarcharias koerti
"Odontaspis koerti" = Brachycarcharias koerti Stromer 1910 sand tiger shark
Odontaspis koerti and Odontaspis koerti itoriensis
 Lamniformes - Lamnidae
Carcharodon debrayi, "Oxyrhina desori" = Isurus oxyrinchus
Carcharodon debrayi Leriche 1906 white shark
"Oxyrhina desori" = Isurus oxyrinchus Rafinesque 1810 mackerel shark
Oxyrhina desori praecursor
Cephalopoda
  -
Belosaepia sepioides
Bivalvia
 Carditida - Carditidae
Cossmannella costaenodulosis, Cossmannella triparticostata, Cossmannella costaeirregularis, "Venericardia cf. planicosta" = Venericor planicosta
Cossmannella costaenodulosis clam
stated as abundant in the field
"Venericardia cf. planicosta" = Venericor planicosta Lamarck 1801 clam
Ostracoda
 Podocopida - Leguminocythereidae
Basslerites abalidiegwuensis
 Podocopida - Bythocyprididae
Bythocypris alejo
 Podocopida - Loxoconchidae
Loxoconcha lagosensis
Malacostraca
 Decapoda - Carpiliidae
Holcocarcinus sulcatus
Holcocarcinus sulcatus Withers 1924 crab
Anthozoa
 Scleractinia - Turbinoliidae
Turbinolia sp.
Turbinolia sp. Lamarck 1816 stony coral
Foraminifera
 Lituolida - Lituolidae
Textularia gramen
Textularia gramen dOrbigny 1846
 Lituolida - Ammobaculinidae
Haplophragmium pseudospirale, Haplophragmium fontinense
Globothalamea
 Rotaliida - Discorbidae
Discorbina globularis, Discorbina orbicularis, Discorbina turbo
Nodosariata
 Nodosariida - Nodosariidae
Nodosaria obliqua, Lagena apiculata, Lagena sulcata
Lagena apiculata Reuss 1850
Lagena sulcata Williamson 1848
Foraminifera
 Biokovinacea - Charentiidae
Peneroplis carinatua
  -
Cristellaria rotulata
 Rotaliina - Bolivinidae
Bolivina textilarioides, Bolivina plicata
 Discorbacea - Eponididae
Pulvinulina brongniartii, Pulvinulina oblonga, Pulvinulina hauerii, Pulvinulina elegans
 Buliminacea - Uvigerinidae
Uvigerina canariensis, Uvigerina pygmaea
 Rotaliina - Cassidulinidae
Cassidulina laevigata, Cassidulina subglobosa
Tubothalamea
 Miliolida -
Miliolina tricarinata, Miliolina pygmaea, Miliolina seminulum, Miliolina contorta, Miliolina ferussacii, Miliolina boueana, Miliolina bicarinella, Miliolina sulcifera, Miliolina (Adelosina) laevigata, Miliolina (Adelosina) bicornis
Miliolina (Adelosina) bicornis
Miliolina (Adelosina) bicornis elegans
 Miliolida - Miliolidae
Spiroloculina excavata
Spiroloculina excavata d'Orbigny 1846
Foraminifera
 Globigerinaceae - Heterohelicidae
"Textularia globulosa" = Heterohelix globulosa
"Textularia globulosa" = Heterohelix globulosa Ehrenberg 1840
 Globigerinaceae - Globotruncanidae
"Globigerina cretacea" = Archaeoglobigerina cretacea
"Globigerina cretacea" = Archaeoglobigerina cretacea d'Orbigny 1840
 Globigerinoidea - Globorotaliidae
"Globigerina dutertrei" = Neogloboquadrina dutertrei, "Globigerina pachyderma" = Neogloboquadrina pachyderma, "Pullenia obliquiloculata" = Pulleniatina obliquiloculata
"Globigerina dutertrei" = Neogloboquadrina dutertrei d'Orbigny 1839
"Globigerina pachyderma" = Neogloboquadrina pachyderma Ehrenberg 1861
"Pullenia obliquiloculata" = Pulleniatina obliquiloculata Parker and Jones 1865
 Buliminoidea - Buliminidae
Bulimina fusiformis, Virgulina schreibersiana
Truncatulina
  -
Truncatulina lobatula, Truncatulina refulgens, Truncatulina ungeriana, Truncatulina haidingerii, Truncatulina pygmaea