Authors: Jaroslav Marek, Radko Šarič & Petr Kácha
Full version (4,227 kB)Abstract: In the middle Sandbian and lower Katian (Upper Ordovician) rocks of the Barrandian area,In the middle Sandbian and lower Katian (Upper Ordovician) rocks of the Barrandian area,the fossil remains of conulariids are relatively abundant. Their thecae were sometimes used as solid surfacesfor the attachment of epizoans, mostly craniid brachiopods of the genus Petrocrania, more rarelyalso echinoderms Hemicystites and Agelacrinites, and bryozoans Ceramopora and Spatiopora. The orientationof shells of Petrocrania suggests that conulariids (mostly belonging to the genus Archaeconularia) were dead at the time of the brachiopod attachment, their thecae were partly fragmentary and secondarilyreplaced. A find of Pseudoconularia grandissima attached to the theca of the cystoid Codiacystis is alsoreported.
