Lynna River valley, A. raniceps zone (Ordovician of Russian Federation)

Where: St. Petersburg, Russian Federation (60.0° N, 32.6° E: paleocoordinates 35.6° S, 1.9° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Asaphus raniceps trilobite zone, Lopukhinka Member (Sillaoru Formation), Kunda (468.1 - 463.5 Ma)

• Boundary Marl.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray, red claystone and glauconitic, ooidal, gray, argillaceous limestone

• "The Sillaoru Formation is here probably only represented by the Lopukhinka

•Member (Dronov, 1997), some 50 cm thick. The lower 10 cm is a red to grey clay bed with almost no iron ooliths. Above this follows a light grey argillaceous limestone with some glauconite and iron ooliths.", in Rasmussen & Harper (2008)

Size classes: macrofossils, mesofossils

Primary reference: C. M. O. Rasmussen and D. A. T. Harper. 2008. Resolving early Mid-Ordovician (Kundan) bioevents in the East Baltic based on brachiopods. Geobios 41:533-542 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191361: authorized by Björn Kröger, entered by Björn Kröger on 23.01.2018, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

 Billingsellida - Polytoechiidae
 Billingsellida - Gonambonitidae
Gonambonites sp. Pander 1830
 Billingsellida - Clitambonitidae
 Strophomenida - Plectambonitidae
Ingria sp. Öpik 1930
 Strophomenida - Taffiidae
Ukoa ornata Öpik 1932
 Pentamerida -
Syntrophiidina indet. Ulrich and Cooper 1936
 Orthida - Paurorthidae
Paurorthis parva Pander 1830
 Orthida - Orthidae
 Orthida - Lycophoriidae
Lycophoria sp. Lahusen 1885
 Lingulida - Pseudolingulidae
Pseudolingula sp. Mickwitz 1909