Where: Siberia, Russian Federation (71.0° N, 127.5° E: paleocoordinates 20.3° S, 15.1° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Judomia trilobite zone, 7 Member (Tyuser Formation), Atdabanian (521.0 - 516.0 Ma)
• Given as Middle Sub member by Skovsted; called Tyuserian formation in Rosanov et al. 1969 p. 37.
• group of beds-level stratigraphic resolution
Environment/lithology: glauconitic, gray, green, red limestone
Size classes: macrofossils, mesofossils, microfossils
Primary reference: A. Y. Rozanov, V. V. Missarzhevsky, N. A. Volkova, L. G. Voronova, I. N. Krylov, B.M. Keller, I. K. Korolyuk, K. Lendzion, R. Mikhnyar, N. G. Pykhova, and A. D. Sidorov. 1969. Tommotskiu jarus i problema nizhney granisty kembriya [The Tommotian Stage and the Cambrian lower Boundary problem]. Trudy Geoligske Institut Leningrad 206:1-379 [P. Wagner/P. Wagner/P. Novack-Gottshall]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 56855: authorized by Pete Wagner, entered by Pete Wagner on 27.11.2005, edited by Sarah Tweedt
Creative Commons license: CC BY (attribution)
Taxonomic list
Discinella | |
Mobergella | |
"Mobergella hexactina n. sp." = Mobergella radiolata2
"Mobergella hexactina n. sp." = Mobergella radiolata2 Bengston 1968 Discinella brastadi (part) of Rozanov et al.: however, it seems that it is only some of the specimens (PJW)
| |
Coeloscleritophora | |
Chancelloria sp. Walcott 1920 | |
Bivalvia | |
"Fordilla sibirica n. sp." = Fordilla troyensis1
"Fordilla sibirica n. sp." = Fordilla troyensis1 Barrande 1881 clam Not explicitly stated, but this is the only plausible bed given Krasilova's description.
| |
Helcionelloida | |
Pelagiella lorenzi Kobayashi 1939 | |
Tannuella sp. Rozanov et al. 1969 | |
Hyolitha | |
Burithes elongatus Missarzhevskiy 1969 | |
Orthothecimorpha | |
Costatheca clinisepta Syssoiev 1960 | |
Hyolitha | |
Triplicatella "sp. B"3 Conway Morris 1990 | |
Conotheca circumflexa Rozanov et al. 1969 | |
Allatheca degeeri Holm 1893 | |
Brachiopoda | |
Brachiopoda indet. Cuvier 1805 | |
Artiopoda | |
"Pagetiellus sp." = Delgadella
"Pagetiellus sp." = Delgadella Walcott 1908 | |
Trilobita | |
Judomia dzevanovskii Lermontova 1951 trilobite | |
Triangulaspis sp. Lermontova 1940 trilobite |