Preliminary Report on the New Findings of Mississippian Trilobites in the Březina Formation (Moravian Karst, Czech Republic)

Abstract

New fossiliferous layers of the Březina

Revison of an Atheloptic Visean Trilobite Association in the Moravian Karst (Czech Republic)

“…Recent revision of High-resolution biostratigraphy of the Tournaisian-Visean (Mississippian) boundary interval in the Mokrá quarry by Kalvoda et al (2009) has shown the stratigraphic importance of this fauna. revised the trilobite association from the quarry for the first time and Weiner et al (2012) published a preliminary report on a trilobite occurrence from the Říčka Valley. New discoveries of trilobites from the village of Březina have enriched our knowledge of their stratigraphic importance.…”

The first lower Viséan trilobite association from limestone facies of the Moravian Karst and its relation to the sedimentary environment (Líšeň Formation, Czech Republic)

“…species from the lower part of the Viséan (= Lower to Middle Viséan, ?or up to the lowermost Upper Viséan, cu IIγ-δ stage, see Fig. 1E) have only been described from the aleuropelitic facies of the Březina Formation (Chlupáč 1966(Chlupáč , 1969Kalvoda et al 2010;Weiner et al 2012;Rak et al 2014). In this paper, the first lower Viséan trilobite association from limestone facies of the Líšeň Formation is described and discussed.…”

“…This species is associated with further taxa, such as smalleyed archegonids and blind weaniine trilobite Combewoodia (or formerly cystispinine, Hahn et al 2007 andHahn 2018). These associations are characterised by blind or smalleyed taxa (similarity with atheloptic assemblage sensu Fortey & Owens 1987; see Weiner et al 2012, Rak et al 2014. Another lower Viséan trilobite association from the shale successions of the Březina Formation was recorded in the valley of the Říčka brook near BrnoLíšeň, where somewhat largereyed archegonids [Archegonus (Phillibole) cf.…”

“…Trilobite localities previously assigned to the lower part of the Viséan were only known in aleuropelitic shale successions of the Březina Formation. These localities include Březina, valley of the Říčka brook, Zbrašov near Hranice, and Čelechovice (Chlupáč 1966(Chlupáč , 1969Weiner et al 2012;Rak et al 2014). With the exceptions of a borehole (Chlupáč 1966) and a surface locality (Weiner et al 2012) in the valley of the Říčka brook, presence of often abundant blind cystispinine trilobite Spinibole (Spinibole) olgae Chlupáč, 1966 is typical in these localities.…”

“…These localities include Březina, valley of the Říčka brook, Zbrašov near Hranice, and Čelechovice (Chlupáč 1966(Chlupáč , 1969Weiner et al 2012;Rak et al 2014). With the exceptions of a borehole (Chlupáč 1966) and a surface locality (Weiner et al 2012) in the valley of the Říčka brook, presence of often abundant blind cystispinine trilobite Spinibole (Spinibole) olgae Chlupáč, 1966 is typical in these localities. This species is associated with further taxa, such as smalleyed archegonids and blind weaniine trilobite Combewoodia (or formerly cystispinine, Hahn et al 2007 andHahn 2018).…”