Watersheds of creeks emptying into the Maymakan River, south of the Omnya uplift (Cambrian of Russian Federation)

Where: Uchur-Maya, Russian Federation (58.8° N, 130.6° E: paleocoordinates 11.0° S, 16.9° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Aldanocyathus sunnaginicus - Dokidocyathus regularis other zone, Upper Member (Pestrotsvetnaya Formation), Tommotian (530.0 - 520.0 Ma)

• Total thickness of formation is 80m. The Pestrotsvetnaya Formation overlies the Yudoma Formation and is overlain by the Yukhta Formation;

•upper portion of Aldanocyathus sunnaginicus and lower part of the Dokidocyathus regularis

• formation-level stratigraphic resolution

Environment/lithology: lithified, red, argillaceous limestone and lithified, calcareous conglomerate

• ENVIRONMENT: Not stated, but apparently carbonate marine.
• LITHOLOGY: Red clayey limestones and calcareous breccias with interbedded siliceous rocks.

Size classes: mesofossils, microfossils

Preservation: cast

Collection methods: chemical,

• The author obtained the material from the Nagim geological party of the ""Dal'geologiya"" Producing Organization (PGO). All original holotypes are deposited at the Paleontological Institue, USSR Academy of Sciences (PIN) as collection No. 4245.

Primary reference: M. I. Barskova. 1987. New species of Lower Cambrian gastropods from the Uchur-Maya region. Paleontological Journal 21(2):121-125 [M. Patzkowsky/P. Borkow/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 99809: authorized by Pete Wagner, entered by Pete Wagner on 23.11.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Helcionelloida
 Pelagiellida - Aldanellidae
"Aldanella attleborensis" = Aldanella attleborensis, "Aldanella uchurica" = Aldanella attleborensis
"Aldanella attleborensis" = Aldanella attleborensis Shaler and Foerste 1888
"Aldanella uchurica" = Aldanella attleborensis Shaler and Foerste 1888
 Helcionellida - Helcionellidae
Igorella ungulata Rozanov et al. 1969
Anabarella plana Vostokova 1962