Lynna River section L23A (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)

• 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 157104: authorized by Melanie Hopkins, entered by Melanie Hopkins on 06.06.2014, edited by Björn Kröger

Creative Commons license: CC BY (attribution)

Taxonomic list

 Orthida - Platystrophiidae
 Orthida - Productorthidae
Panderina ? sp.1, "Productorthis obtusa" = Productorthis obtusus1
Panderina ? sp.1 Schuchert and Cooper 1931
"Productorthis obtusa" = Productorthis obtusus1 Pander 1830
 Pentamerida - Porambonitidae
Porambonites planus1 Pander 1830
 Billingsellida - Polytoechiidae
 Siphonotretida - Siphonotretidae
 Lingulida -
Linguloidea indet.1 Menke 1828
 Craniida - Craniidae
 Phacopida - Pterygometopidae
Pterygometopus sclerops2 Dalman 1827 trilobite
 Phacopida - Encrinuridae
Cybele bellatula2 Dalman 1827 trilobite
 Phacopida - Cheiruridae
Nieszkowskia tumida2 Angelin 1854 trilobite
subspecies gibba
? Laneites ingrica2 Schmidt 1881 trilobite
Cyrtometopus clavifrons2 Dalman 1827 trilobite
 Harpetida - Harpididae
 Trinucleida - Raphiophoridae
Lonchodomas volborthi2 Schmidt 1894 trilobite
 Asaphida - Remopleurididae
Remopleurides sp.2 Portlock 1843 trilobite
 Asaphida - Asaphidae
"Asaphus lepidurus" = Asaphus (Asaphus) lepidurus2 Nieszkowski 1859 trilobite
subgenus Asaphus
Megistaspis gibba2 trilobite
subgenus Rhinoferus
 Corynexochida - Leiostegiidae
 Corynexochida - Panderiidae
Pogrebovites sp.2 Balashova 1976 trilobite
 Lichida - Lichidae
Metopolichas sp.2 Gürich 1901 trilobite
Megistaspis hyorrhina
"Megistaspis hyorrhina" = Rhinoferus hyorrhinus2
"Megistaspis hyorrhina" = Rhinoferus hyorrhinus2 Leuchtenberg 1843
subgenus Rhinoferus