M410/73, Ary-Mas-Yuryakh River mouth (Cambrian of Russian Federation)

Where: Yakutiya, Russian Federation (71.0° N, 102.0° E: paleocoordinates 24.8° S, 6.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nochoroicyathus sunnaginicus zone, 12 Member (Medvezhyn Formation), Tommotian (530.0 - 520.0 Ma)

• Listed as Ajacicyathus sunnaginicus-Tiksitheca licis zone

• bed-level stratigraphic resolution

Environment/lithology: red, argillaceous limestone

• The Bastion and Ella Island Formations from part of a thick succession of shallow-marine Proterozoic-Ordovician sediments deposited on the Laurentian shelf.
• Violet, dull pink, gray-cherry red argillaceous limestones bearing prolific fossils concentrated in lenses and thin bands.

Size classes: macrofossils, mesofossils, microfossils

Collection methods: bulk, chemical, acetic, sieve,

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 96395: authorized by Pete Wagner, entered by Pete Wagner on 05.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Scyphozoa
 Anabaritida - Anabaritidae
"Anabarites tripartitus" = Selindeochrea tripartita Rozanov et al. 1969 jellyfish
"Anabarites tricarinatus" = Selindeochrea tricarinata Rozanov et al. 1969 jellyfish
Tiksitheca licis Rozanov et al. 1969 jellyfish
Anabarites tristichus Rozanov et al. 1969 jellyfish
Anabarites trisulcatus Voronova and Missarzhevsky 1969 jellyfish
Cambrotubulus decurvatus Rozanov et al. 1969 jellyfish
Fomitchella
  -
Helcionelloida
 Pelagiellida - Aldanellidae
Aldanella crassa n. sp. Rozanov et al. 1969
 Helcionellida - Helcionellidae
Igorella ungulata, "Latouchella korobkovi" = Oelandiella korobkovi
Igorella ungulata Rozanov et al. 1969
"Latouchella korobkovi" = Oelandiella korobkovi Vostokova 1962
Hyolitha
 Orthothecida -
"Turcutheca cotuiensis" = Khetatheca cotuiensis Syssoiev 1959