M408/4, 7 kilometers above Ulukhan-Sulugur River Mouth (Cambrian of Russian Federation)

Also known as Was Gastropoda of Siberia, Locality (2) - Aldan R., Ulakhan-Sulugur Creek - Layer 8

Where: Yakutia, Russian Federation (58.8° N, 127.0° E: paleocoordinates 11.0° S, 14.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Aldanocyathus sunnaginicus zone, Pestrotsvet Formation, Tommotian (525.5 - 521.0 Ma)

• Lower Tommotian; Aldanocyathus sunnaginicus zone, Layer 8

• bed-level stratigraphic resolution

Environment/lithology: marine; limestone and claystone

• A glauconitic-calcareous sandstone bed of uneven thickness rests on the slightly wavy surface of the underlying rock member.

Size class: mesofossils

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: taxonomic analysis

PaleoDB collection 45848: authorized by Martin Aberhan, entered by Sabine Nürnberg on 10.12.2004, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Helcionelloida
 Pelagiellida - Aldanellidae
"Aldanella rozanovi" = Aldanella attleborensis
"Aldanella rozanovi" = Aldanella attleborensis Shaler and Foerste 1888
 Helcionellida - Helcionellidae
Bemella jacutica Rozanov and Missarzhevsky 1966
Bemella parula Rozanov et al. 1969
Barskovia
  - Khairkhaniidae
Barskovia sp. Golubev 1976
Brachiopoda
 Tommotiida - Sunnaginiidae
Sunnaginia imbricata Rozanov et al. 1969
Scyphozoa
 Anabaritida - Anabaritidae
Cambrotubulus decurvatus Rozanov et al. 1969 jellyfish
Tiksitheca sp. Rozanov et al. 1969 jellyfish
 Hyolithelminthida - Torellellidae
 Hyolithelminthida - Hyolithellidae
Hyolithellus sp. Billings 1872