Ewekoro Quarry (Paleocene of Nigeria)

Where: Nigeria (6.9° N, 3.2° E: paleocoordinates 1.3° S, 3.5° W)

• outcrop-level geographic resolution

When: Globorotalia pusilla pusilla-Morozovella angulata - lower Globorotalia pseudomenardii foram zone, Ewekoro Formation, Selandian (61.6 - 59.2 Ma)

• Globorotalia pusilla pusilla-Morozovella angulata zone and lower part of the Globorotalia pseudomenardii zone (Petters & Olsson, 1979). Overlain by the AKINBO Formation unconformably.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, shelly/skeletal, gray limestone

• coquinoidal limestone, sandy at the base, shelley in the middle and marly at the top. limestone is coarse-grained with extensive recystalization.

Size classes: macrofossils, mesofossils

Preservation: replaced with calcite

Primary reference: O. S. Adegoke. 1977. Stratigraphy and Paleontology of the Ewekoro Formation (Paleocene) of Southwestern Nigeria. Bulletins of American Paleontology 71(295):1-379 [L. Ivany/E. Kowalski]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 7791: authorized by Linda Ivany, entered by Elizabeth Kowalski on 02.06.2000, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• Several of the families are new.
unclassified
  -
Malacostraca
 Decapoda - Callianassidae
Callianassa seefriedi Ammon 1905 decapod
Bivalvia
 Arcida - Arcidae
 Arcida - Glycymerididae
 Arcida - Parallelodontidae
Cucullaria coxi n. sp. clam
 Arcida - Cucullaeidae
 Pectinida - Plicatulidae
Plicatula gorodiskii n. sp. scallop
 Pectinida - Anomiidae
Anomia cooperi n. sp. jingle
? Carolia freneixi n. sp. scallop
 Ostreida - Gryphaeidae
Pycnodonte nigeriensis n. sp. oyster
 Ostreida - Ostreidae
? Crassostrea sp. Sacco 1897 oyster
Ostrea meunieri oyster
Ostrea meunieri nigeriensis
Ostrea sohli n. sp. oyster
Ostrea kauffmani n. sp. oyster
Ostrea sp. Linnaeus 1758 oyster
Ostrea durotoyei n. sp. oyster
Ostrea abeokutaensis n. sp. oyster
Ostrea olowui n. sp. oyster
Ostrea asseezi n. sp. oyster
Ostrea omatsolae n. sp. oyster
 Ostreida - Malleidae
Vulsella walleri n. sp. oyster
 Mytilida -
Sootryenella ewekoroensis n. gen. n. sp. clam
 Mytilida - Mytilidae
Mytilus nigeriensis n. sp. mussel
Lithophaga turneri n. sp. mussel
Modiolus sp. Lamarck 1801 mussel
 Carditida - Astartidae
 Carditida - Carditidae
 Pholadida - Corbulidae
 Cardiida - Corbiculidae
Corbicula sp. Megerle 1811 clam
 Cardiida -
? Aeora africana n. sp. clam
 Cardiida - Arcticidae
Arctica africana n. sp. clam
 Cardiida - Trapezidae
 Cardiida - Glossidae
Glossus nigeriana n. sp. clam
 Cardiida - Mactridae
 Cardiida - Ungulinidae
 Cardiida - Veneridae
Pitar ewekoroensis n. sp. venus clam
Dosiniopsis ewekoroensis n. sp. venus clam
Transennella africana n. sp. venus clam
Macrocallista ewekoroensis n. sp. venus clam
Macrocallista lunulata n. sp. venus clam
Macrocallista femii n. sp. venus clam
Tivelina ewekoroensis n. sp. venus clam
 Cardiida - Donacidae
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
 Cardiida - Cardiidae
Cardium guineense n. sp. cockle
Cardium nicklesi n. sp. cockle
Cardium okeziei n. sp. cockle
 Lucinida - Lucinidae
Gastropoda
 Cephalaspidea - Cylichnidae
 Triphoroidea - Triforidae
 Triphoroidea - Cerithiopsidae
Cerithiopsis fagadei n. sp. snail
 Architaenioglossa - Ampullinidae
Ampullina tapina snail
Ampullina tapina kogbei
 Neogastropoda - Olivellidae
 Neogastropoda - Columbellidae
 Neogastropoda - Buccinidae
Strepsidura newtoni n. sp. true whelk
Pseudoliva funkeana n. sp. true whelk
Psuedoliva funkeana funkeana [20]; Psuedoliva funkeana ornata [1]
Pseudoliva adelekei n. sp. true whelk
[entered as Psuedoliva adelekei]
Pseudoliva rogersi n. sp. true whelk
[entered as Psuedoliva rogersi]
Pseudoliva guineensis n. sp. true whelk
[entered as Psuedoliva guineensis]
Janiopsis ewekoroensis n. sp. true whelk
Siphonalia guineensis n. sp. true whelk
Siphonalia bryani n. sp. true whelk
Siphonalia nigeriensis n. sp. true whelk
 Neogastropoda - Melongenidae
Sycostoma eamesi n. sp. snail
Sycostoma jonesi n. sp. snail
Sycostoma robusta n. sp. snail
Heligmotoma oluwolei n. sp. snail
Pugilina akoi n. sp. snail
Cornulina africana n. sp. snail
Levifusus yochelsoni n. sp. snail
 Neogastropoda - Fasciolariidae
Clavilithes toyei n. sp. snail
 Neogastropoda -
Vincenturris woodringi n. gen. n. sp.
Vincenturris woodringi n. gen. n. sp. snail
 Neogastropoda - Speightiidae
Clinuropsis diderrichi snail
Clinuropsis diderrichi nigeriensis
 Neogastropoda - Cancellariidae
Bonellitia sp. Jousseaume 1887 snail
 Neogastropoda - Marginellidae
"Cryptospira sp. n. sp." = Marginella (Cryptospira)
"Cryptospira sp. n. sp." = Marginella (Cryptospira) margin shell
 Neogastropoda - Volutidae
"Volutocorbis furoni n. sp." = Athleta (Volutocorbis) volute
Voluta africana n. sp. volute
 Neogastropoda - Costellariidae
Conomitra guineensis n. sp. ribbed mitre
 Neogastropoda - Muricidae
Hexaplex ewekoroensis n. sp. murex snail
Rapana ewekoroensis n. sp. murex snail
 Neogastropoda - Harpidae
"? Oniscidia aff. chavani" = Morum (Oniscidia)
"? Oniscidia aff. chavani" = Morum (Oniscidia) snail
 Neogastropoda - Turridae
Turricula nigeriensis n. sp. turrid
Turricula ewekoroensis n. sp. turrid
Surculites kogbei n. sp. turrid
 Stromboidea - Strombidae
Tibia oppenheimi n. sp. true conch
Tibia bivarica n. sp. true conch
? Terebellum sp. Röding 1798 true conch
 Stromboidea - Rostellariidae
"Rimella adekunbiana n. sp." = Cyclomolops adekunbiana, "Rimella ewekoroensis n. sp." = Calyptraphorus ewekoroensis
"Rimella adekunbiana n. sp." = Cyclomolops adekunbiana Adegoke 1977 snail
"Rimella ewekoroensis n. sp." = Calyptraphorus ewekoroensis Adegoke 1977 snail
 Vanikoroidea - Hipponicidae
 Naticoidea - Naticidae
Crommium nigeriense n. sp. moon snail
 Cypraeoidea - Pediculariidae
Cypraedia ogbei n. sp. Adegoke 1977 snail
 Cypraeoidea - Eocypraeidae
"Cypraea ewekoroensis n. sp." = Eocypraea ewekoroensis, Eocypraea nigeriensis n. sp.
"Cypraea ewekoroensis n. sp." = Eocypraea ewekoroensis Adegoke 1977 snail
Eocypraea nigeriensis n. sp. Adegoke 1977 snail
 Cypraeoidea - Cypraeidae
Gisortia brevis Douvillé 1920 cowry
Gisortia brevis ewekoroensis
 Vermetoidea - Vermetidae
Burtinella turriformis n. sp. worm shell
Vermetus nigeriensis n. sp. worm shell
 Calyptraeoidea - Calyptraeidae
Calyptraea nigeriensis n. sp. slipper shell
Calyptraea ewekoroensis n. sp. slipper shell
 Tonnoidea - Ranellidae
Sassia nigeriana n. sp. triton shell
Sassia africana n. sp. triton shell
 Tonnoidea - Bursidae
Bursa saundersi n. sp. frog shell
 Rissooidea - Rissoidae
 Sorbeoconcha - Campanilidae
 Sorbeoconcha - Potamididae
 Sorbeoconcha - Thiaridae
Bayania cheneyi n. sp. snail
? Bayania sp. Munier-Chalmas 1877 snail
 Sorbeoconcha - Diastomatidae
Ewekoroia nigeriensis n. gen. n. sp. snail
Ewekoroia acirsoides n. gen. snail
Ewekoroia rugifera n. gen. n. sp. snail
 Sorbeoconcha - Planaxidae
Planaxis africana n. sp. snail
 Sorbeoconcha - Turritellidae
Mesalia fallockensis turret shell
Mesalia fallockensis ewekoroensis
Mesalia passi turret shell
Mesalia rogersi n. sp. turret shell
Mesalia salvani n. sp. turret shell
Mesalia reymenti n. sp. turret shell
Mesalia akinolae n. sp. turret shell
Mesalia akinkugbei n. sp. turret shell
Mesalia sp. Gray 1847 turret shell
Torquesia oppenheimi n. sp. turret shell
Reymentella olaniyani n. gen. n. sp. turret shell
Haustator furoni n. sp. turret shell
Haustator nigeriensis n. sp. turret shell
Haustator oyawoyei n. sp. turret shell
Haustator sp. n. sp. Monfort 1810 turret shell
 Sorbeoconcha - Batillariidae
Pyrazus nigeriensis n. sp. snail
 Sorbeoconcha - Cerithiidae
Cerithium coorayi n. sp., Druidwilsonia guineense n. gen. n. sp., Wendella nigeriensis n. gen. n. sp.
Cerithium coorayi n. sp. cerith snail
Druidwilsonia guineense n. gen. n. sp. cerith snail
Wendella nigeriensis n. gen. n. sp. cerith snail
 Heterostropha - Acteonidae
 Neritoidea - Neritidae
Velates nigeriensis n. sp. snail
 Pyramidelloidea - Pyramidellidae
Syrnola isiakae n. sp. snail
Odostomia nigeriensis n. sp. snail
 Architectonicoidea - Architectonicidae
Architectonica asseezi n. sp. sundial
Architectonica sp. Röding 1798 sundial
 Seguenzioidea - Turcicidae
 Fissurelloidea - Fissurellidae
 Trochoidea - Trochidae
Afrollonia nigeriensis n. gen. n. sp. top snail
Afrollonia togoensis n. gen. n. sp. top snail
Afrollonia angustiumbilicata n. gen. n. sp. top snail
Solariella adedayoi n. sp. top snail
Tectus africanus n. sp. top snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium guineense n. sp. tusk shell
Dentalium nigeriense n. sp. tusk shell
Dentalium ewekoroense n. sp. tusk shell
Cephalopoda
 Nautilida - Hercoglossidae
Cimomia ogbei n. sp. Adegoke 1977 nautiloid
Cimomia reymenti n. sp. Adegoke 1977 nautiloid
Cimomia dessauvagiei n. sp. Adegoke 1977 nautiloid
Cimomia milleri n. sp. Adegoke 1977 nautiloid
Cimomia (Afrocimomia) ewekoroensis n. sp. Adegoke 1977 nautiloid
Deltoidonautilus togoensis Miller 1951 nautiloid
Chondrichthyes
 Myliobatiformes - Rhinopteridae
Rhinoptera sp. Cuvier 1829 cownose ray
 Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816 eagle ray
 Lamniformes - Odontaspididae
Odontaspis sp. Agassiz 1843 sand tiger shark
Echinoidea
 Cassiduloida - Cassidulidae
Cassidulus kieri n. sp. sea urchin
 Clypeasteroida - Fibulariidae
 Calycina - Phymosomatidae
Thylechinus tessieri n. sp. sea urchin
Tritonidea
  -