West of Billingstad, 4bα zone, Arnestad Fm. (Ordovician to of Norway)
Where: Asker, Norway (59.9° N, 10.5° E: paleocoordinates 31.8° S, 9.7° W)
• coordinate estimated from map
When: Arnestad Formation, Haljala to Haljala (456.8 - 453.0 Ma)
• " 4bα"= Arnestad Fm.
Environment/lithology: shale
Size classes: macrofossils, mesofossils
Primary reference: H. Soot-Ryen and T. Soot-Ryen. 1960. The Middle Ordovician of the Oslo region, Norway: 11, Pelecypoda. Norsk Geologisk Tidsskrift 40(2):81-122 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 194667: authorized by Björn Kröger, entered by Björn Kröger on 25.06.2018
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
Bivalvia | |
Ctenodonta sp. Salter 1852 clam | |
Strophomenata | |
"Strophomena (Gunnarella) alpha" = Gunnarella
"Strophomena (Gunnarella) alpha" = Gunnarella | |
Leptaena ennessbe Spjeldnaes 1957 | |
Oslomena osloensis Spjeldnaes 1957 | |
"Ptychoglyptus valdari" = Ptychoglyptus irregularis, Eoplectodonta acuminata
"Ptychoglyptus valdari" = Ptychoglyptus irregularis Reed 1940
Eoplectodonta acuminata Holtedahl 1916 | |
Christiania holtedahli Spjeldnaes 1957 |