A New Llandovery (Early Silurian) Conodont Biozonation and Conodonts From the Becscie, Merrimack, and Gun River Formations, Anticosti Island, Québec

Gauging the impact of glacioeustasy on a mid-latitude early Silurian basin margin, mid Wales, UK

“…Dahlqvist & Bergstom (2005) and Mannik (2007) provided reviews of conodont biostratigraphical research that reflect extensive recent work, particularly in the Baltic region (see also Rubel et al, 2007;Loydell, Nestor & Mannik, 2010), but also in North America (e.g. Zhang & Barnes, 2002a;Kleffner, 2004;Kleffner, Barrick & Drachen, 2004). The level of subdivision now achieved in the Telychian is beginning to rival that provided by graptolites, but establishing a detailed conodont biozonation for the Rhuddanian and Aeronian has proved elusive.…”

“…Aldridge, 1985). Zhang & Barnes (2002a) put forward a more detailed subdivision based on the succession on Anticosti Island , Québec, but the wider applicability of their scheme has been questioned (e.g. Dahlqvist & Bergstom, 2005).…”

Late Ordovician–Early Silurian (Ashgillian–Llandovery) sea level curve derived from conodont community analysis, Anticosti Island, Québec

“…3 kg) from di¡erent sources: (1) 102 samples from the Ordovician Vaure ¤al Formation which yielded nearly 50 000 disjunct conodont elements representing 35 multielement species (Nowlan and Barnes, 1981); (2) 47 selected samples from the Ellis Bay Formation at Baie Ellis that produced 3 600 conodont elements representing 21 multielement species, 15 of them extending from the Vaure ¤al Formation (McCracken and Barnes, 1981); (3) 63 selected samples from the Becscie, Merrimack and Gun River formations which contain over 19 000 conodont elements (Zhang and Barnes, 2002a) representing 24 multielement species, several of which are Fig. 2.…”

Telychian (Llandovery, Silurian) conodonts from the LaPorte City Formation of eastern Iowa, USA (East-Central Iowa Basin) and their implications for global Telychian conodont biostratigraphic correlation

“…The elements are moderately laterally compressed. See Zhang and Barnes (2002) and Jeppsson (1997) for thorough descriptions and species diagnoses. Remarks.…”

“…We follow the suggestion of Jeppsson (1997) that P. recurvatus is a junior synonym of P. panderi. Zhang and Barnes (2002) suggested that P. recurvatus may not be a member of genus Panderodus, if their inclusion of double-furrowed elements that lack lateral costae in the apparatus is valid. No specimens were recovered fitting this description.…”