The Asaphus raniceps problem in the Ordovician of Sweden

Bulletin of the Geological Society of Denmark

Huuse, M. 2002–12–02:¹ 

[1] Late Cenozoic palaeogeography of the eastern North Sea Basin: climatic vs tectonic forcing of basin margin uplift and deltaic progradation. Bulletin of the Geological Society of Denmark, Vol. 49, pp. 145–170. Copenhagen.

关键词: Cenozoic;    North Sea Basin;    Climate;    Eustasy;    Tectonics.;   

学科分类：地球科学(综合)

来源: Dansk Geologisk Forening

【 摘 要 】

It has been repeatedly stated that the lower Llanvirn Asaphus raniceps described by Dalman in 1827 and by Angelin in 1854 may represent two different species. This has forced us to live with the concepts of both A. raniceps Dalman and A. ‘raniceps’ sensu Angelin, and with a zone of A. ‘raniceps’ where A. raniceps is supposedly not present. However, new considerations based on large old and new collections have led to the firm conclusion that Angelin was correct in his identification of Dalman’s species. What has been regarded recently as the true Asaphus raniceps, at least by Tjernvik & Johansson in 1980 and by Nielsen in 1995, is instead identical with another generally misidentified species, Asaphus fallax Angelin 1854.

【 授权许可】

Unknown