Re-assessment of ammonoid specimens from the Early Carboniferous Protocanites Beds of the Badenweiler–Lenzkirch Zone (Schwarzwald, Central Variscan Belt): age constraints for a lithostratigraphic key bed

Abstract The Protocanites Beds of the Black Forest Massif (Germany) form an important lithostratigraphic key bed, as index fossils contained in this formation enable correlation within large areas internal zone central Variscan Belt Europe. Furthermore, provides significant information on geodynamic evolution Moldanubian Zone. stratigraphic age has been a subject controversy past; Devonian to Viséan proposed. To determine Beds, two ammonoid specimens from Schönau are re-described here. They belong Becanites abnobensis and Pericylcus princeps fix position early Late Tournaisian.