Syverstad (Ordovician of Norway)

Where: Oslo, Norway (59.9° N, 10.5° E: paleocoordinates 28.1° S, 9.0° W)

When: Glyptograptus persculptus graptolite zone, Tommarp Formation, Porkuni (445.6 - 443.7 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Primary reference: E. Koken and J. Perner. 1925. Die Gastropoden des baltischen Untersilurs 1-324 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 172790: authorized by Pete Wagner, entered by Pete Wagner on 23.08.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trochonematoidea - Trochonematidae
"Nematotrochus bicarinatus" = Globonema kokeni
"Nematotrochus bicarinatus" = Globonema kokeni Wenz 1938 snail
 Euomphalina - Platyceratidae
"Eunema rupestre" = Cyclonema rupestre
"Eunema rupestre" = Cyclonema rupestre d'Eichwald 1856 snail