Conodonts across the Devonian/Carboniferous boundary: a review and implication for the redefinition of the boundary and a proposal for an updated conodont zonation

Abstract

This paper is a contribution to the redefinition of the base of Carboniferous system. At present the criterion for the definition of the Devonian–Carboniferous boundary is the first occurrence of a conodont species. In order to evaluate the stratigraphic potential for new criteria for the definition of the Devonian–Carboniferous boundary, the distribution of conodont species of Bispathodus, Branmehla, Palmatolepis, Polygnathus, Protognathodus, Pseudopolygnathus and Siphonodella across the boundary is presented and discussed. An updated biozonation scheme across the boundary based on the First Appearance of Bispathodus ac. aculeatus, Bispathodus costatus, Bispathodus ultimus, Protognathodus kockeli, Siphonodella bransoni and Siphonodella duplicata is proposed, and it is suggested that the new criterion for the definition of the base of the Carboniferous system be the First Appearance Datum of Pr. kockeli or Si. bransoni

A stable and productive marine microbial community was sustained through the end‐Devonian Hangenberg Crisis within the Cleveland Shale of the Appalachian Basin, United States

“…Despite the global nature of the crisis, limitations on the use of traditional proxies for defining the HC (mainly the use of the Siphonodella praesulcata conodont zone and positive δ 13 C carb excursions) have arisen, prompting the improvement and integration of bio-, litho-, and chemostratigraphies to identify the crisis interval (Carmichael et al, 2015;Corradini, Spalletta, Mossoni, Matyja, & Over, 2017). In particular, suites of δ 13 C org , sea level, and redox proxies have been shown to viably define the Hangenberg interval, combined with insight from biostratigraphy (Kaiser, 2005;Carmichael et al, 2015;Kaiser et al, 2015).…”

Conodont biostratigraphy and microfacies of the Late Devonian to Mississippian Milivojevića Kamenjar section (Družetić, NW Serbia)

“…In our investigations, we provide new data for the correlation of the section with other regions were new zonations have been worked out (e.g. Corradini 2003Corradini , 2008Kaiser et al 2009;Corradini et al 2011Corradini et al , 2016Kalvoda et al 2015;Mossoni et al 2015;Spalletta et al 2017).…”

“…Ziegler et al (1974), Sandberg et al (1978), Ziegler & Sandberg (1984), Over (1992) Corradini et al (2011Corradini et al ( , 2016, Kalvoda et al (2015), Mossoni et al (2015) and Spalletta et al (2017 (Nemyrovska 2005); the zonation based on the species from this part of Lochriea lineage is recognized only in Eurasian areas. Especially in the last fifteen years, the first appearance datum (FAD) of Lo.…”

“…However, in the Devonian-Carboniferous boundary interval, conodonts are not abundant and because of problems with the taxonomy of early siphonodellids (see Corradini et al 2016) and the absence of the Protognathodus species, the establishment of the conodont zones was less successfully.…”

Unique location of early Protognathodus (Conodonts) on the Chernyshev Swell

“…Phylogeny and stratigraphic ranges of the species of Protognathodus (based on[18, 23]) Palm. gracilis sigmoidalis, Palm.…”