TY - JOUR A1 - Kordule,V. T1 - Ptychopariid trilobites in the Middle Cambrian of Central Bohemia (taxonomy, biostratigraphy, synecology) JF - Bulletin of Geosciences JA - Bull. Geosci. Y1 - 2006 VL - 81 IS - 4 SP - 277 EP - 304 CY - Prague PB - Czech Geological Survey SN - 1803-1943 (online), 1802-6222 (print) AV - Free KW - Bohemia KW - Middle Cambrian KW - trilobites KW - new taxa KW - biostratigraphy AB - A revision of ptychopariid trilobites from the Middle Cambrian of central Bohemia is presented. With a few exceptions, they were previously referred only to Ptychoparia striata. Three genera are recently distinguished: Ptychoparia Hawle &Corda, 1847, Ptychoparioides Ruzicka, 1940, and Mikaparia gen. nov. Seven species are described: three are revised, four are new, and two is left in open nomenclature; their stratigraphical ranges and significance are discussed. A new stratigraphical subdivision of the Middle Cambrian of the Skryje-Tyrovice area is suggested, including three assemblage zones and three barren zones. Four substrate and bathymetrically controlled trilobite associations are recognized in the Skryje-Tyrovice area. ER -