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- Title
Stenolaemate bryozoans from the Mjøsa Formation (Late Ordovician, Katian) of Helgøya (Mjøsa), southern Norway.
- Authors
Ernst, Andrej; Nakrem, Hans Arne
- Abstract
A stenolaemate bryozoan fauna from the Late Ordovician (Katian) Mjosa Formation of Bergevika (Helgoya, Mjosa), southern Norway contains nine species. Seven species belong to the Order Trepostomata: Esthoniopora subsphaerica (Bassler, 1911), Hallopora gracilens Bassler, 1927, Diazipora parva (Bassler, 1911), Hemiphragma batheri Bassler, 1911, Eridotrypa suecica Brood, 1978, Trematopora brutoni sp. nov. and Anaphragma latviense Pushkin, 1976. Two species belong to the Suborder Ptilodictyina of the Order Cryptostomata: Trigonodictya cyclostomoides (Eichwald, 1855) and Astrovidictya sparsa Lavrentjeva in Gorjunova & Lavrentjeva, 1993. The bryozoan faunal association is similar to that found in equivalent Baltoscandian units elsewhere, but rather different from Laurentian units. Their known biostratigraphic range is generally Late Ordovician.
- Subjects
NORWAY; MJOSA Lake (Norway); BRYOZOA; GEOLOGY; ANIMALS
- Publication
Norwegian Journal of Geology / Norsk Geologisk Forening, 2011, Vol 91, Issue 3, p163
- ISSN
0029-196X
- Publication type
Article