Occurrences of hexactinellid sponges (Porifera) in the Jince ("middle" Cambrian, Drumian) and the Šárka formations (Ordovician, Darriwillian) in the Barrandian area (Czech Republic)

Geoscience Research Reports 46, 2013 (GRR for 2012), pages 185–188

Full text (PDF, 1.19 MB)

Abstract

New occurrences of hexactinellid sponges in the Barrandian area are presented. Despite their poor preservation, isolated hexactineand pectactine spicules of the hyalosponges indicate, that this invertebrate group was present also in the marine associations of the lower Jince Formation (Cambrian) and the Šárka Formation (Darriwilian, Ordovician). These findings contribute to our knowledge of invertebrate diversity in the Cambrian and Ordovican seas of the Příbram-Jince and Prague basins, respectively