Conodont biostratigraphy of the upper Frasnian-lower Famennian transitional deposits in the Shotori Range, Tabas area, Central-East Iran Microplate

Abstract

A rich and diverse conodont fauna from upper Frasnian and lower-middle Famennian strata in three sectionsGhale-kalaghu, Howz-e-dorah 1 and Howz-e-dorah 2 -in the southern Shotori Range of central Iran contains forty-five taxa belonging to eight genera, dominated by icriodids and polygnathids, from the Lower rhenana Zone to the velifer Zone (= Uppermost marginifera Zone). A hiatus is documented across the Frasnian/Famennian boundary that possibly includes the Upper rhenana to the Middle triangularis Zone.•

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

“…Branmehla inornata (Branson & Mehl) is a long-ranging taxon that survived the Hangenberg Event (Ziegler & Sandberg, 1984) and entered the Carboniferous system (Over, 1992; Kaiser et al 2009; Bahrami, Corradini & Yazdi, 2011). Mehlina strigosa (Branson & Mehl) was once considered extinct at the DCB, but recently it has been documented together with definitely Carboniferous associations (Kaiser et al 2009; Bahrami, Corradini & Yazdi, 2011).…”

“…A redefinition of the Devonian–Carboniferous boundary (DCB) was determined necessary, and in 2008 the International Commission on Stratigraphy established a working group with the goal of proposing a new criterion for defining the boundary and finding a new GSSP. For that purpose several sections are under investigation around the world, including already-known localities (Mossoni, Corradini & Spalletta, 2013; Kumpan et al 2014 b ; Malec, 2014) and new locations (Bahrami, Corradini & Yazdi, 2011; Becker et al 2013; Girard et al 2014; Komatsu et al 2014; Kumpan et al 2014 b ; Kalvoda, Kumpan & Babek, 2015; Mossoni et al 2015; Qie et al 2015), and main fossil groups are subject to revision. Multiproxy studies including isotope stratigraphy, gamma-ray and magnetic susceptibility are also in progress (Kumpan et al 2014 a ; Matyja et al 2015).…”

Devonian palaeobiogeographic affinities of Afghanistan and surrounding areas (Iran, Pakistan)

“…In particular, in 2005 they also provided, section by section, the distribution of different faunal groups (conodonts, brachiopods, tentaculitid and trilobites). Other more local studies (Brice, 1999a(Brice, , 1999bBrice et al, 1999;Brice et al, 2006;Brice and Kebria-ee, 2000;Rohart, 2000;Turner et al, 2002;Aaripour et al, 2009aAaripour et al, , 2009bBahrami et al, 2011Bahrami et al, , 2013 were also published.…”

“…Gholamalian et al (2009) described and illustrated a large Famennian conodont fauna from Kal-e-Sardar, with 63 species. Bahrami et al (2013) described and illustrated also a large upper Frasnian-lower/middle Famennian conodont fauna from the Shotori Range, Tabas area.…”

Editorial preface: IGCP 596, Mid-Paleozoic climate and biodiversity: Proceedings of the Opening Meeting in Graz, Austria (September 19–24, 2011)

“…Further papers on biostratigraphy deal with Middle to Late Devonian conodonts from the Spanish Central Pyrenees (Gouwy et al 2013 and with Late Devonian conodont faunas from the Shotori Range in Iran (Bahrami et al 2013). Based on a high-resolution sampling and a detailed systematic study, authors increase and consolidate knowledge on conodont biostratigraphy, which is an important contribution to the understanding of the phylogenetic relationship of conodont taxa.…”