Early silurian brachiopods (Rhynchonellata) from the saelabonn formation of the ringerike district, Norway

被引：0

作者：

Thomsen, Elsebeth ^{[1
]}

Jin, Jisuo

Harper, David A. T.

机构：

[1] Univ Tromso, Dept Geol, NO-9037 Tromso, Norway

[2] Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada

[3] Geol Museum, DK-1350 Copenhagen K, Denmark

来源：

BULLETIN OF THE GEOLOGICAL SOCIETY OF DENMARK | 2006年 / 53卷

关键词：

Rhynchonellate brachiopods; Early Silurian; biostratigraphy; taxonomy; Norway;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A revision of Meer's index fossils of "Etage" 6 in the Ringerike district of Norway reveals the pres ence of four species: Rostricellula wadti sp. nov., Platytrochalos ringerikensis sp. nov., Platytrochalos rabbei sp. nov., and Zygospiraella duboisi. Rostricellula is a common Ordovician rhynchonellide brachiopod and is known to occur in the Lower Silurian as a holdover taxon in only a few localities worldwide. Previously, Platytrochalos was known only from the Lower Silurian (Llandoverian) rocks of Anticosti Island, eastern Canada. The occurrence of this rare genus in the Ringerike district provides additional information for the early evolution and palaeogeography of the taxonomically enigmatic family Leptocoeliidae. Zygospiraella is regarded as an index genus for the Rhuddanian, and the presence of Z. duboisi provides a useful biostratigraphic control on the age of the Saelaborm Formation.

引用

页码：111 / 126

页数：16

共 45 条

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[2]

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[3]

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[4]

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