Vtoraya Sentyabrskaya river (Bed 37) (Triassic of Russian Federation)

Where: Russian Federation (60.3° N, 149.3° E: paleocoordinates 84.3° N, 96.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Sirenites yakutensis ammonoid zone, Tuvalian (232.0 - 221.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; nodular, gray, silty, sandy mudstone and argillaceous limestone

Size class: macrofossils

Primary reference: Y.u. M. Bychkov. 1977. [Sections of the Trias from the upper River Kolym and northern Priochotya]. [Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Sciences of the USSR] 344:51-82 [A. Dunhill/B. Allen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 214802: authorized by Alex Dunhill, entered by Bethany Allen on 16.10.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Carditida - Cardiniidae
Cardinia indigirkaensis Kiparisova 1947 clam
 Ostreida - Halobiidae
"Halobia cf. ornatissima" = Halobia (Zittelihalobia) ornatissima Smith 1927 oyster
Halobia obruchevi Kiparisova 1937 oyster
Halobia superba Mojsisovics 1874 oyster
 Pectinida - Pectinoidae
Cephalopoda
 Phylloceratida - Discophyllitidae
Discophyllites nikolaevi Popov 1958 ammonite
 Ceratitida - Trachyceratidae
Striatosirenites aff. kedonensis Bychkov 1973 ceratite
Sirenites aff. hayesi Smith 1927 ceratite
"Neosirenites cf. irregularis" = Sirenites irregularis Kiparisova 1937 ceratite
 Ceratitida - Arcestidae
 Nautilida - Tainoceratidae
 Nautilida - Clydonautilidae