In-Dama, Mont Igdaman (bed 8) (Cretaceous of Niger)

Also known as Mount Igdaman, Tahoua

Where: Tahoua, Niger (15.5° N, 6.3° E: paleocoordinates 5.2° N, 1.0° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Dukamaje Formation, Maastrichtian (72.1 - 66.0 Ma)

• pre-Maastrichtian Senonian layer, now prob. Maastrichtian = the "Mosasaurus Shales"

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; phosphatic siliciclastic sediments

• "a bed of phosphate nodules, 80 cm thick, formed nearly exclusively of vertebrae and teeth..."; the layer is beneath this bed.

Size class: macrofossils

Collected by Roure in the 1950s

Primary reference: J. Greigert, F. Joulia, and A. F. Lapparent. 1954. Répartition strtigraphique des gisements de Vertébrés dans le Crétacé du Niger [Stratigraphic arrangement of vertebrate localities in the Cretaceous of Niger]. Comptes Rendus Hebdomadaires des Seances de l'Académie des Sciences 249:433-435 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48868: authorized by Matthew Carrano, entered by Matthew Carrano on 01.04.2005, edited by Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Acrodontidae
Asteracanthus aegyptiacus3 Stromer 1927 elasmobranch
 Rhinopristiformes - Pristidae
Marckgrafia nigeriensis n. sp.3 Tabaste 1963 sawfish
Onchosaurus pharao3 Dames 1887 sawfish
Schizorhiza stromeri3 Weiler 1930 sawfish
 Myliobatiformes - Myliobatidae
Myliobatis sp.3 Cuvier 1816 eagle ray
Actinopteri
 Salmoniformes - Enchodontidae
? Enchodontidae indet.3 Woodward 1901
vertebrae
 Alepisauriformes - Dercetidae
Stratodus apicalis3 Cope 1872
 Pycnodontiformes - Pycnodontidae
Pycnodontidae indet.3 Agassiz 1835
"Pycnodonte sp."
Coelodus plethodon3 Arambourg and Joleaud 1943
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus humei3 Priem 1914 lungfish
Ceratodus tuberculatus3 Tabaste 1963 lungfish
Reptilia
 Testudinata -
Testudinata indet.2 Oppel 1811 turtle
 Saurischia -
Titanosaurus sp. Lydekker 1877 sauropod
tentative assignment
 Avetheropoda -
? Bahariasaurus ingens2 Stromer 1934 avetheropod
 Squamata - Mosasauridae
Mosasauridae indet.1 Gervais 1852 mosasaur
Stephanodus
  - Trigonodontidae