New species of Yochelcionella (Mollusca: Helcionelloida) from the Lower Cambrian of North Greenland

Bulletin of the Geological Society of Denmark

Hints, L.¹  Sohar, K. 2003–04–30:¹  Meidla, T.¹  Hints, O.¹ 

[1] Biotic effects of the Ordovician Kinnekulle ash-fall recorded in northern Estonia. Bulletin of the Geological Society of Denmark vol. 50, pp. 115– 123. Copenhagen.

关键词: Ordovician;    K-bentonites;    volcanic ash-falls;    biotic effects;    ostracodes;    scolecodonts.;   

学科分类：地球科学(综合)

来源: Dansk Geologisk Forening

【 摘 要 】

Two new species of the helcionelloid mollusc genus Yochelcionella Runnegar & Pojeta, 1974 are described from Lower Cambrian strata within the Brønlund Fjord Group of central North Greenland. Yochelcionella greenlandica n. sp. is also tentatively identified from continental slope deposits of the Browns Pond Formation of New York and the ‘Anse Maranda Formation’ of Québec. The internal mould of the almost orthoconic Yochelcionella gracilis n.sp. shows a pegma-like fissure between the apex and the snorkel, a feature ortherwise only reported in Y. fissurata Hinz-Schallreuter, 1997 from the Middle Cambrian of Bornholm.

【 授权许可】

Unknown