3km from Alikent, upstream Tsmurchai River (Cretaceous of Russian Federation)

Where: Russian Federation (41.6° N, 47.8° E: paleocoordinates 34.2° N, 51.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Gundara Formation, Late/Upper Aptian (122.5 - 113.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, gray, argillaceous, calcareous sandstone

• Gray, dense, clayey, calcareous sandstones with large, clayey, calcareous concretions.

Size classes: macrofossils, mesofossils

Collected by Smirnova; reposited in the PIN

Primary reference: T. N. Smirnova. 2012. Early Cretaceous Rhynchonellids of Dagestan: System, Morphology, Stratigraphic and Paleobiogeographic Significance. Paleontological Journal 46(11):1197-1296 [M. Clapham/M. Manojlovic]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 155706: authorized by Matthew Clapham, entered by Marko Manojlovic on 25.04.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burrirhynchia oweni, Burrirhynchia polygona, Burrirhynchia latimarginata n. sp., Kudrjavzevina regularis
Burrirhynchia oweni Smirnova 2012
Burrirhynchia polygona d'Orbigny 1847
20 complete and 6 slightly laterally compressed shells
Burrirhynchia latimarginata n. sp. Smirnova 2012
Kudrjavzevina regularis Smirnova 2012
 Rhynchonellida - Cyclothyrididae
Lobachevina vagus, Cyclothyris aliformis n. sp., Cyclothyris dagestanica, Cyclothyris zudakharica, Cyclothyris gibbsiana, Cyclothyris alikentica n. sp., Cyclothyris latissima
Lobachevina vagus Smirnova 2012
Cyclothyris aliformis n. sp. Smirnova 2012
14 complete and eight slightly pressed shells
Cyclothyris dagestanica Smirnova 2012
Cyclothyris zudakharica Smirnova 2012
Cyclothyris gibbsiana Sowerby 1829
Cyclothyris alikentica n. sp. Smirnova 2012
Cyclothyris latissima Sowerby 1829