Lynna River section L22B (Ordovician of Russian Federation)

Where: Russian Federation (60.0° N, 32.6° E: paleocoordinates 37.7° S, 1.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Megistaspis simon trilobite zone, Jeltiaki Member (Volkhov Formation), Volkhov (471.1 - 469.2 Ma)

• Meterage is negative because 0 meterage in section is at boundary between Jeltiaki member and overlying Frizy member which rests above this sample.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified limestone

• Limestone beds are tempestites

Size class: mesofossils

Primary reference: T. Hansen and A. T. Nielsen. 2003. Upper Arenig trilobite biostratigraphy and sea-level changes at Lynna River near Volkhov, Russia. Bulletin of the Geological Society of Denmark 50:105-114 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 157086: authorized by Melanie Hopkins, entered by Melanie Hopkins on 05.06.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Cheiruridae
Cyrtometopus clavifrons Dalman 1827 trilobite
? Laneites ingrica Schmidt 1881 trilobite
 Phacopida - Pterygometopidae
Pterygometopus sclerops Dalman 1827 trilobite
 Trinucleida - Raphiophoridae
Lonchodomas volborthi Schmidt 1894 trilobite
 Asaphida - Asaphidae
Niobe sp. Angelin 1851 trilobite
subgenus Niobella
 Corynexochida - Leiostegiidae
? Agerina sp. Tjernvik 1956 trilobite
 Lichida - Lichidae
Metopolichas sp. G├╝rich 1901 trilobite