Chenaibo coastal cliff, sample W-C (Cretaceous of Japan)

Where: Japan (45.4° N, 142.0° E: paleocoordinates 54.8° N, 135.3° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Chenaibo Formation (Middle Yezo Group), Cenomanian (100.5 - 93.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

• The bones are embedded in a large calcareous nodule, which came from a shale bed containing a few plant fragments

Size classes: macrofossils, microfossils

Preservation: concretion

Primary reference: I. Obata, Y. Kawashita, S. Maiya, Y. Taketani, M. Futakami and T. Suzuki. 1989. An Upper Cretaceous plesiosaur (Family Elasmosauridae) from the Wakkanai area Hokkaido. Bulletin of the National Science Museum, Series C: Geology, Tokyo 15(1):25-31 [J. Alroy/R. Whatley/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28176: authorized by John Alroy, entered by Erin Leckey on 27.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Nodosariata
 Nodosariida - Nodosariidae
"Oolina apiculata" = Lagena apiculata Reuss 1850
Dentalina sp. d'Orbigny 1826
Dentalina catenula Reuss 1860
 Vaginulinida - Vaginulinidae
Globothalamea
 Rotaliida - Cibicididae
 Rotaliida - Gavelinellidae
Foraminifera
 Lituolida - Lituolidae
 Lituolida - Haplophragmoididae
 Globigerinoidea - Globigerinidae
"Hedbergella delrioensis" = Globigerina delrioensis
"Hedbergella delrioensis" = Globigerina delrioensis Carsey 1954
 Ammodiscoidea - Ammodiscidae
 Trochamminacea - Trochamminidae
 Astrorhizacea - Bathysiphonidae
 Hormosinacea - Hormosinidae
 Nodosariacea - Ellipsolagenidae
Protozoa
 Nassellaria - Xitidae
Novixitus weyli Schmidt-Effing 1980 radiolarian
 Nassellaria - Pseudodictyomitridae
 Nassellaria - Eucyrtidiidae
 Nassellaria - Sethocapsidae
Sethocapsa simplex Taketani 1982 radiolarian
 Nassellaria - Williriedellidae
Holocryptocanium barbui Dumitrica 1970 radiolarian
 Nassellaria - Syringocapsidae
 Nassellaria - Archaeodictyomitridae
Thanarla elegantissima Cita 1964 radiolarian