Stenolaemate bryozoans from the Mjosa Formation (Late Ordovician, Katian) of Helgoya (Mjosa), southern Norway

作者：Ernst Andrej^*; Nakrem Hans Arne

来源：Norwegian Journal of Geology, 2011, 91(3): 163-180.

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 Sassier, 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.

• 出版日期2011
• 单位中国地质博物馆