Lopsiya River, outcrop 41, bed 3 (Jurassic of Russian Federation)

Where: Khanty-Mansi Autonomous Okrug, Russian Federation (62.5° N, 60.3° E: paleocoordinates 58.5° N, 56.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Aulacostephanus sosvaensis ammonoid zone, Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• Kimmeridgian Stage, Upper Substage, Aulacostephanus sosvaensis Zone; thickness: 5.5 m

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray, blue claystone

• The explored Kimmeridgian section denuded along the Lopsiya River formed under the embayment conditions of an epicontinental West Siberian sea, covering the territory of more than 2 mln km^2. This Lyapinsky Bay was rather shallow and opened toward the NNE. The narrow band of the Uralian Peninsula seperated it from the Timon-Pechora Sea in the west, and the small Berezovsky Archipelago seperated it from the West Siberian Sea in the east.
• Dark-gray bluish plastic clays. At the bottom and 3.30 m apart from the bottom lie flattened concretions of gray limestones with large ammonites.

Size class: macrofossils

Collection methods: Repository: VNIGRI

Primary reference: M. S. Mesezhnikov. 1984. Kimeridzhskiy i Volzhskiy Yarusy Severa SSSR 1-224 [M. Clapham/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 58778: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.02.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Aulacostephanidae
Aulacostephanus (Aulacostephanus) sosvaensis, Aulacostephanus (Pararasenia) aff. quenstedti, Aulacostephanus (Pararasenia) semieudoxus, Aulacostephanus (Pararasenia) tobolicus
 Belemnitida - Cylindroteuthididae
Lagonibelus (Lagonibelus) ingens
 Belemnitida -
Pachyteuthis (Pachyteuthis) cf. panderiana, Pachyteuthis (Pachyteuthis) grossa, Pachyteuthis (Boreioteuthis) troslayana, Simobelus (Simobelus) breviaxis, Simobelus (Simobelus) lopsiensis
Pachyteuthis (Boreioteuthis) troslayana d'Orbigny 1850 belemnite
Bivalvia
 Arcida - Parallelodontidae
Cosmetodon keyserlingi
 Pectinida - Oxytomidae
Oxytoma cf. expansa
 Ostreida - Gryphaeidae
Liostrea sp.
Liostrea sp. Douvillé 1904 oyster
 Carditida - Astartidae
Astarte (Astarte) lopsiyaensis
Astarte (Astarte) lopsiyaensis clam
A. (A.) lopsiyaensis lopsiyaensis