Lynna River section L25K (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 limbata trilobite zone, Frizy 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 157121: authorized by Melanie Hopkins, entered by Melanie Hopkins on 06.06.2014, edited by Pete Wagner and Björn Kröger

Creative Commons license: CC BY (attribution)

Taxonomic list

 Orthida - Orthidae
 Orthida - Productorthidae
 Orthida - Ranorthidae
Ranorthis spp.2 Öpik 1939
 Orthida - Paurorthidae
Paurorthis spp.2 Schuchert and Cooper 1931
 Pentamerida - Porambonitidae
 Billingsellida - Polytoechiidae
Raunites venusta2 Opik 1934
 Billingsellida - Clitambonitidae
Apomatella ingrica2 Pahlen 1877
 Strophomenida - Plectambonitidae
"Ingria nefedyevi" = Ingria nefedjevi2
"Ingria nefedyevi" = Ingria nefedjevi2 Eichwald 1855
 Strophomenida - Sowerbyellidae
Ujukella fastigata2 Rubel 1961
 Craniida - Craniidae
 Siphonotretida - Siphonotretidae
 Lingulida -
Linguloidea indet.2 Menke 1828
 Phacopida - Cheiruridae
Bornholmaspis sp. Pribyl and Vanek 1983 trilobite
Cyrtometopus sp. Angelin 1854 trilobite
Krattaspis paraspinosis1 Hansen 2010 trilobite
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Asaphida - Asaphidae
Megistaspis acuticauda Angelin 1854 trilobite
subgenus Megistaspidella
Niobe sp. Angelin 1851 trilobite
subgenus Niobella
"Asaphus lepidurus" = Asaphus (Asaphus) lepidurus Nieszkowski 1859 trilobite
subgenus Asaphus
 Asaphida - Nileidae
Nileus sp. Dalman 1827 trilobite