TY - JOUR A1 - Radzevicius,S. A1 - Raczynski,P. A1 - Whittingham,M. T1 - Lower Homerian (Silurian) Pristiograptus from the Zdanow section, Bardo Mountains (Sudetes, Poland) and their palaeobiogeographical implications JF - Bulletin of Geosciences JA - Bull. Geosci. Y1 - 2020 VL - 95 IS - 2 SP - 231 EP - 242 CY - Prague PB - Czech Geological Survey SN - 1803-1943 (online), 1802-6222 (print) AV - Free KW - Homerian KW - Silurian KW - Bardo Mountains KW - Sudetes KW - Poland KW - Pristiograptus KW - Graptoloidea AB - Pristiograptus dubius pseudodubius and Pristiograptus lodenicensis were collected from outcrops of black pelagic shales of the Zdanow section of the Bardo Mountains (Sudetes, Poland). The species are easily distinguished from one another in that P. lodenicensis has distinct lobate processes on its thecae, whereas those of P. d. pseudodubius are comparatively unornamented. Our findings indicate that the age of the Lower Graptolitic Shales in the Zdanow is the middle part of the C. lundgreni graptolite Biozone (lower Homerian, upper Wenlock). The presence of P. d. pseudodubius at this site adds another locality to its global range, while the presence and abundance of P. lodenicensis further indicates the restriction of the latter species to the Rheic palaeo-ocean. ER -