Cape Urdyuk-Khaya-3 (Jurassic of Russian Federation)

Where: Siberia, Russian Federation (73.0° N, 113.0° E)

• Paleocoordinates: 76.0° N, 59.3° E (Wright 2013)

• outcrop-level geographic resolution

When: Chetaites chetae ammonoid zone, Lower Member (Paksa Formation), Tithonian (149.2 - 143.1 Ma)

• VIII; exposure 33, layer 17; exposure 32, layer 10

• member-level stratigraphic resolution

Environment/lithology: marine; pyritic, gray, carbonaceous claystone

• in the lower part of the member are thin lenslike inclusions of light-grey calcareous clays; also present are two rows of small, ellipsoidal laminated concretions of pelitomorphic calcareous phosphorite

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 2477: authorized by Mark Patzkowsky, entered by Karen Layou on 06.07.1999

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Malacostraca
 Decapoda -
Decapoda indet.
Decapoda indet. Latreille 1802 decapod
Bivalvia
 Pectinida - Buchiidae
ex gr. Buchia volgensis
ex gr. Buchia volgensis Lahusen 1888 scallop
originally entered as "Buchia ex gr. volgensis"
 Pectinida - Pectinoidae
? Aequipecten arachnoideus
? Aequipecten arachnoideus scallop
originally entered as "Aequipecten? arachnoideus"
Cephalopoda
 Ammonoidea -
Ammonoidea indet.
Ammonoidea indet. ammonite
originally entered as "Ammonites sp."
 Phylloceratida - Phylloceratidae
? Phylloceras sp.
? Phylloceras sp. Suess 1865 ammonite
originally entered as "Phylloceras? sp."
 Ammonitida - Perisphinctidae
? Virgatosphinctes sp., ? Chetaites sp., cf. Chetaites chetae
? Virgatosphinctes sp. Uhlig 1910 ammonite
originally entered as "Virgatosphinctes? sp."
? Chetaites sp. Shul'gina 1962 ammonite
originally entered as "Chetaites? sp."
cf. Chetaites chetae ammonite
originally entered as "Chetaites cf. chetae"
 Ammonitida - Polyptychitidae
Craspedites sp.
Nodosariata
 Vaginulinida - Vaginulinidae
? Saracenaria vermis, Lenticulina raritas
? Saracenaria vermis
originally entered as "Saracenaria? vermis"
 Polymorphinida - Polymorphinidae
Eoguttulina sp.
 Nodosariida - Nodosariidae
? Dentalina sp.
? Dentalina sp. d'Orbigny 1826
originally entered as "Dentalina? sp."
Foraminifera
 Lituolida - Haplophragmoididae
Haplophragmoides emeljanzevi, Haplophragmoides schleferi, Haplophragmoides volossatovi
 Lituolida - Lituolidae
ex gr. Gaudryina gerkei, Ammobaculites sp.
ex gr. Gaudryina gerkei
originally entered as "Gaudryina? ex gr. gerkei"
Ammobaculites sp. Cushman 1910
 Lituolida - Trochamminidae
Trochammina septentrionalis, ex gr. Trochammina rosaceaformis
ex gr. Trochammina rosaceaformis
originally entered as "Trochammina ex gr. rosaceaformis"
 Ammodiscoidea - Ammodiscidae
Glomospirella intrita
  -
"Marginulina subformosa" = Cristellaria (Marginulina)
"Marginulina subformosa" = Cristellaria (Marginulina)