Cape Urdyuk-Khaya-5 (Cretaceous of Russian Federation)

Where: Siberia, Russian Federation (73.0° N, 113.0° E: paleocoordinates 75.5° N, 91.9° E)

• outcrop-level geographic resolution

When: Hectoroceras kochi zone, X Member, Berriasian (145.0 - 139.8 Ma)

• exposure 33, layer 23-27; exposure 32, layers 16-18; exposure 31, layers 1a-2

• member-level stratigraphic resolution

Environment/lithology: marine; burrowed, pyritic, gray shale

• pyrite nodules, siderite grains, and small limestone concretions are 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 2479: authorized by Mark Patzkowsky, entered by Karen Layou on 06.07.1999, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• trace fossils include "galleries of mud eaters"
Nodosariata
 Vaginulinida - Vaginulinidae
Lenticulina sp. Lamarck 1804
originally entered as "Lenticulina spp."
? Saracenaria vermis
originally entered as "Saracenaria? vermis"
Foraminifera
 Lituolida - Haplophragmoididae
ex gr. Haplophragmoides emeljanzevi
originally entered as "Haplophragmoides ex gr. emeljanzevi"
 Lituolida - Lituolidae
  -
"Marginulina pyramidalis" = Cristellaria (Marginulina)
"Marginulina pyramidalis" = Cristellaria (Marginulina)
 Trochamminacea - Trochamminidae
 Ammodiscoidea - Ammodiscidae
 Lituolacea - Ammosphaeroidinidae
Cephalopoda
 Ammonitida - Polyptychitidae
Surites sp. Sazonov 1951 ammonite
originally entered as "Surites sp."
Hectoroceras kochi Spath 1947 ammonite
aff. Praetollia maynci ammonite
originally entered as "Praetollia aff. maynci"
Praetollia contigua ammonite
Praetollia maynci var. contigua
Praetollia sp. ammonite
Subcraspedites sp. Spath 1924 ammonite
Bivalvia
 Nuculida - Nuculidae
Nucula sp. Lamarck 1799 nut clam
 Pectinida - Limidae
Lima sp. Bruguière 1797 file clam
 Pectinida - Oxytomidae
cf. Oxytoma arcticostata scallop
originally entered as "Oxytoma cf. arcticostata"
 Pectinida - Buchiidae
cf. Buchia unschensis scallop
originally entered as "Buchia cf. unschensis"
Buchia sp. Rouillier 1845 scallop
Buchia sp. Rouillier 1845 scallop
"sp. juv." - originally entered as "Buchia sp. juv."
aff. Buchia robusta scallop
originally entered as "Buchia aff. robusta"
Buchia volgensis Lahusen 1888 scallop
cf. Buchia terebratuloides Lahusen 1888 scallop
originally entered as "Buchia cf. terebratuloides"
aff. Buchia uncitoides Pavlow 1907 scallop
originally entered as "Buchia aff. uncitoides"
cf. Buchia okensis Pavlow 1907 scallop
originally entered as "Buchia cf. okensis"
 Pectinida - Pectinoidae
cf. Camptonectes lens Sowerby 1818 scallop
originally entered as "Camptonectes cf. lens"
? Aequipecten arachnoideus scallop
originally entered as "Aequipecten? arachnoideus"
Malacostraca
 Decapoda -
Decapoda indet. Latreille 1802 decapod