Division of Přídolí Series in Central Bohemia: graptolite and conodont biostratigraphy, faunal changes, and geochemical record

Graptolite biostratigraphy and biodiversity dynamics in the Silurian System of the Prague Synform (Barrandian area, Czech Republic)

“…Skalograptus parultimus appears first in all sections but ranges even higher than Sk. ultimus in the northern part of the uppermost level of the Kosov quarry and overlaps with the lowermost Skalograptus lochkovensis in the Radotín-Hvížďalka section (Manda et al 2023). A combined parultimus-ultimus Biozone is preferred in the present biozonal scheme also because of the almost continual variation in thecal and sicular morphology between the two taxa.…”

“…The bouceki Biozone is one of the earliest erected and most widely recognized biozones of the upper Silurian graptolite biozonal scheme. It was established by Přibyl (1940b) and further characterized by Přibyl (1983), Kříž et al (1986) and Manda et al (2023). The upper part of the biozone is marked by local occurrences of Slovinograptus beatus, which occurs at a closely similar stratigraphical level in the Austrian Carnic Alps (Jaeger in Kříž et al 1986), in northwestern China (Ni et al 1998), and most likely also in French Montagne Noire, therein referred as Monograptus microdon (see Piçarra et al 1998 for discussion).…”

“…The lochkovensis Biozone was first recognized in Marble Quarry near Lochkov (Přibyl 1940b). The middle and upper part, 4.4 m thick, is rich in graptolites at Radotín-Hvížďalka (Manda et al 2023). Other verified records of the lochkovensis Biozone are from Žákův Quarry in Velká Chuchle-Přídolí, Praha-Podolí (former quarry above swimming pool), Praha-Braník, Na Požárech quarry near Řeporyje and Kosov quarry (Přibyl 1940b, Kříž et al 1986).…”

“…2) in many sections, but, elsewhere the thickbedded biodetrital limestones of the upper Kopanina Fm. continue into the lower Přídolí or, on the contrary, terminated in the uppermost Ludlow below the base of the Přídolí (Kříž et al 1986, Manda et al 2023. The Požáry Fm.…”

“…The bouceki Biozone has been adopted in graptolite biozonal schemes of the East European Platform (Teller 1997), Central Asia (Korenʼ 1983, Korenʼ & Suyarkova 1997, northwestern China (Ni et al 1998), Arctic Canada (Lenz & Kozłowska-Dawidziuk 2004), Australia (Rickards & Wright 1999), and in the standard charts of Loydell (2012) and Melchin et al (2020). Manda et al (2023) defined the bouceki Biozone as an interval between the stratigraphically lowest occurrence of the biozonal index species and the lowest occurrence of Wolynograptus perneri (Fig. 24).…”