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A new trilobite species of Hemisphaerocoryphe from the Arenig of the St. Petersburg area,Russia
Anew trilobite species Hemisphaerocoryphe Arenig St. Petersburg area
2009/12/3
Hemisphaerocoryphe platinflata n.sp. is described from the Lower Middle Ordovician of north-western Russia (Upper Volkhov Stage). This species expands the stratigraphical occurrence of the genus downw...
Advances in the Ordovician graptolite biostratigraphy of the St Petersburg area,Russia
Ordovician graptolites biostratigraphy St Petersburg area
2009/10/21
The Ordovician shallow-water shelf deposits rich in benthic fauna are exposed along the Russian part of the Baltic– Ladoga Klint. Graptolites occur only at some stratigraphic levels, being compar...