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
Cephalopoda | |
Germanonautilus aff. brooksi Smith 1927 | |
Proclydonautilus spirolobus Dittmar 1866 | |
Discophyllites nikolaevi Popov 1958 ammonite | |
Proarcestes verchojanicus ceratite | |
Striatosirenites aff. kedonensis, Sirenites jakutensis, Sirenites aff. hayesi, "Neosirenites cf. irregularis" = Sirenites irregularis
Striatosirenites aff. kedonensis Bychkov 1973 ceratite
Sirenites jakutensis ceratite
Sirenites aff. hayesi Smith 1927 ceratite
"Neosirenites cf. irregularis" = Sirenites irregularis Kiparisova 1937 ceratite | |
Bivalvia | |
Cardinia indigirkaensis Kiparisova 1947 clam | |
Tosapecten aff. nationalis scallop | |
Halobia cf. kedonensis, "Halobia cf. ornatissima" = Halobia (Zittelihalobia) ornatissima, Halobia superba, Halobia obruchevi
Halobia cf. kedonensis oyster
"Halobia cf. ornatissima" = Halobia (Zittelihalobia) ornatissima Smith 1927 oyster
Halobia superba Mojsisovics 1874 oyster
Halobia obruchevi Kiparisova 1937 oyster |