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Journal of Paleontology; September 2009; v. 83; no. 5; p. 767-782; DOI: 10.1666/09-019.1
© 2009 Paleontological Society
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ARTICLE

BRYOZOAN FAUNA FROM THE KONEPRUSY LIMESTONE (PRAGIAN, LOWER DEVONIAN) OF ZLATY KUN NEAR KONEPRUSY (CZECH REPUBLIC)

ANDREJ ERNST1 and ANDREAS MAY2

1 Institut für Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Str. 10, D-24118 Kiel, Germany <ae{at}gpi.uni-kiel.de>
2 C/Cañada 69, 5 B, E-28850 Torrejón de Ardoz (Madrid), Spain <may_devonian{at}yahoo.es>

This paper presents an overview of the bryozoan fauna from the upper Koneprusy Limestone (kindlei Conodont Zone, middle Pragian, Lower Devonian) exposed in two quarries at Zlaty Kun near Koneprusy in Central Bohemia, and discusses its paleoecology and paleobiogeography. The studied fauna is dominated by encrusting fistuliporine and trepostome bryozoans (eight species), accompanied mainly by reticulate fenestrates (four species), branching ramose trepostomes and cryptostomes (three species), and one massive trepostome species. The richest bryozoan association comes from reef core/margin facies (13 species), followed by crinoid-bryozoan facies of the ramp (eight species). The reef-terrace facies and the crinoid-bryozoan-algal facies contain three and two species respectively. Seven species are described taxonomically, three fistuliporines and four trepostomes. The following taxa are new: Koneprusiella armata n. gen. n. sp., Fistulipora rarivesiculata n. sp., Fistulipora hladili n. sp. and Leptotrypa varia n. sp. Paleobiogeographic patterns of the bryozoan fauna from the Koneprusy Limestone are similar to those of stromatoporoids, comprising widely distributed genera but mainly endemic species. This supports a relative geographic isolation of the Koneprusy reef. The bryozoan fauna from the Koneprusy Limestone shows paleogeographic affinities with that from the Lower Devonian (Pragian) of Morocco and the Middle Devonian of Michigan (USA).

Key Words: Devonian Bryozoa • Bohemia • taxonomy • paleoecology • paleobiogeography






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