Also known as Gastropoda of Siberia, Locality (3) - Lena River, opposite of Isit - Layer 10

Where: Yakutia, Russian Federation (60.8° N, 125.3° E: paleocoordinates 13.1° S, 14.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lapworthella tortuosa small shelly zone, Pestrotsvet Formation, Tommotian (525.5 - 521.0 Ma)

• Was Dokidocyathus regularis zone (above A. sunnaginicus zone), Layer 10, but layer 10 is Dokidocyathus regularis zone in Rozanov et al.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; limestone and claystone

Size class: mesofossils

Preservation: cast, replaced with phosphate

Collection methods: bulk, chemical,

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 45852: authorized by Martin Aberhan, entered by Sabine Nürnberg on 10.12.2004, edited by Pete Wagner

Creative Commons license: CC BY (attribution)