S of Gongila, Chad Basin (Cretaceous of Nigeria)

Where: Nigeria (11.0° N, 11.3° E: paleocoordinates 3.9° S, 4.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Gongila Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Gongila Fm (Cenomanian-Coniacian), which is overlain by the Fika Shales (Santonian-Maastrichtian). AGE: Early Turonian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From 9 ft thick limestone near base of section.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, shelly/skeletal limestone

• ENVIRONMENT: Presumably an shallow siliciclastic marine facies.
• SPECIFIC LITHOLOGY: Fossiliferous limestones. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTOR: Not stated in text, but presumably including the authors. REPOSITORY: Not stated in text.

Primary reference: W. Barber. 1957. Lower Turonian ammonites from north-eastern Nigeria. Geological Survey of Nigeria Bulletin 26:1-87 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 83025: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoids and bivalves, and sometimes including fish. NOMENCLATURE: Not an authoritative publication, and with somewhat antiquated nomenclature. Mostly identified to species resolution.
Cephalopoda
 Ammonitida - Vascoceratidae
Paravascoceras tectiforme Barber 1957 ammonite
"Nigericeras costatum" = Vascoceras glabrum Barber 1957 ammonite
Vascoceras globosum Reyment 1954 ammonite
includes ssp. carteri, plenum, proprium, compressum
Vascoceras ellipticum Barber 1957 ammonite
Vascoceras bulbosum Reyment 1954 ammonite
Vascoceras obscurum Barber 1957 ammonite
 Ammonitida - Acanthoceratidae
Pseudaspidoceras paganum Reyment 1954 ammonite
 Ammonitida - Pseudotissotiidae
"Pseudotissotia (Bauchioceras) nigeriensis" = Pseudotissotia nigeriensis, "Gombeoceras gongilense" = Thomasites gongilensis
"Pseudotissotia (Bauchioceras) nigeriensis" = Pseudotissotia nigeriensis Woods 1911 ammonite
includes ssp. tricarinata, macrocarinata, plana, bicarinata, tabulata
"Gombeoceras gongilense" = Thomasites gongilensis Woods 1911 ammonite
includes ssp. lautum, subtenue, crassicostatum
Gastropoda
 Architaenioglossa - Ampullinidae
Ampullospira bulbiformis1 d'Orbigny 1842 snail
Bivalvia
 Pectinida - Plicatulidae
"Plicatula ferryi" = Plicatula (Plicatula) ferryi1
"Plicatula ferryi" = Plicatula (Plicatula) ferryi1 Coquand 1862 scallop
 Ostreida - Gryphaeidae
"Exogyra olisiponensis" = Costagyra olisiponensis1
"Exogyra olisiponensis" = Costagyra olisiponensis1 Sharpe 1850 oyster
 Pholadomyida - Pholadomyidae
Pholadomya aff. pedernalis1 Roemer 1852 clam
 Cardiida - Arcticidae
"Arctica" globosa1 Sharpe 1850 clam
 Cardiida - Cardiidae
"Cardium (Trachycardium) productum" = Granocardium productum1
"Cardium (Trachycardium) productum" = Granocardium productum1 Sowerby 1832 cockle
 Carditida - Astartidae
Astarte awensis1 Woods 1911 clam
Echinoidea
 Hemicidaroida -
Micropedina olisiponensis2 Forbes in Sharpe 1850 sea urchin
 Spatangoida - Hemiasteridae
"Hemiaster (Mecaster) sp." = Mecaster2
"Hemiaster (Mecaster) sp." = Mecaster2 Pomel 1883 heart urchin
 Calycina - Diplopodiidae
Diplopodia sp.2 sea urchin