Boyarka River-5 (Cretaceous of Russian Federation)

Where: Siberia, Russian Federation (70.8° N, 97.6° E: paleocoordinates 71.2° N, 81.5° E)

• small collection-level geographic resolution

When: Surites analogus zone, IV Member, Berriasian (145.0 - 139.8 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; gray, green, argillaceous siltstone

• lithology described as clayey silt, with some sandy material; intercalations of lenses of grey-yellow plastic clay and calcareous siltstone are present; concretions of calcareous siltstone are also present

Size class: macrofossils

Primary reference: V. N. Saks, ed. 1975. The Jurassic-Cretaceous Boundary and the Berriasian Stage in the Boreal Realm. 1-319 [M. Patzkowsky/K. Layou/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 2470: authorized by Mark Patzkowsky, entered by Karen Layou on 05.07.1999, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Pectinida - Buchiidae
Buchia trigonoides, Buchia uncitoides, Buchia volgensis
Buchia trigonoides Lahusen Smith 1894 scallop
Buchia uncitoides Pavlow 1907 scallop
Buchia volgensis Lahusen 1888 scallop
Gastropoda
 Cerithioidea - Turritellidae
Turritella sp.
Turritella sp. Lamarck 1799 turret shell
Cephalopoda
 Belemnitida - Belemnitidae
Cylindroteuthis repentina, Acroteuthis anabarensis
 Belemnitida - Cylindroteuthididae
Lagonibelus superelongatus
 Belemnitida -
Pachyteuthis curvula
 Ammonitida - Polyptychitidae
Surites subanalogus, Surites sp., Surites aff. analogus
Surites subanalogus ammonite
originally entered as "Surites subanalogus"
Surites sp. Sazonov 1951 ammonite
originally entered as "Surites sp."
Surites aff. analogus Bogoslowsky 1897 ammonite
originally entered as "Surites aff. analogus"
 Ammonitida - Lytoceratidae
Lytoceras sp.
Lytoceras sp. Suess 1865 ammonite