WC55 locality, Gerpigem Fm (Jurassic to of Russian Federation)

Also known as Reef 4318

Where: Russian Federation (44.3° N, 40.2° E)

• Paleocoordinates: 33.7° N, 49.9° E (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: Gerpigem Formation, Late/Upper Callovian to Late/Upper Callovian (165.3 - 152.2 Ma)

Environment/lithology: reef, buildup or bioherm; reef rocks and rudstone

• It comprises mudstones interbedded with thin–medium-bedded bioclastic limestones, with abundant coral and sponge fragments, and plentiful bivalves.

•These grade upwards into massive reef facies that consist of coral-sponge rudstones in the lower part and platy coral reef limestones in the upper part. However, the reefs do not show mound or domal morphologies, but comprise thick biostromes

Size classes: macrofossils, mesofossils

Primary reference: L. Guo, S. J. Vincent, and V. Lavrishchev. 2011. Upper Jurassic Reefs from the Russian Western Caucasus: Implications for the Eastern Black Sea. Turkish Journal of Earth Sciences 20:629-653 [W. Kiessling/M. Krause]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 213016: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 24.08.2020

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Phylloceratida - Phylloceratidae
Sowerbyceras cf. tortisulcatum
Sowerbyceras cf. tortisulcatum d'Orbigny 1841 ammonite
 Ammonitida - Oppeliidae
Hecticoceras cf. pompeckyi
 Ammonitida - Perisphinctidae
"Pachyplanulites subevolutus" = Kranaosphinctes (Pachyplanulites), "Arisphinctes ex gr. plicatilis" = Perisphinctes (Liosphinctes) plicatilis
"Pachyplanulites subevolutus" = Kranaosphinctes (Pachyplanulites) ammonite
"Arisphinctes ex gr. plicatilis" = Perisphinctes (Liosphinctes) plicatilis Sowerby 1817 ammonite
 Ammonitida - Kosmoceratidae
Kosmoceras transitorius