Late Viséan (late Mississippian) ammonoids from the Barnett Shale, Sierra Diablo Escarpment, Culberson County, Texas, USA

Abstract

Abstract. Mid-Carboniferous strata of the Barnett Shale in

Quantitative analysis of suture lines in Carboniferous ammonoids

“…Early and Middle Viséan representatives are unknown, but it is widely distributed in the Late Viséan (Korn et al, 2005). During the early Late Viséan (Asbian of the British chronostratigraphic scheme), the typical genus Goniatites had an almost global distribution (Korn et al, 2005(Korn et al, , 2012, but significant differences occur in the distribution of the superfamily in the latest Viséan (late Brigantian) and early Serpukhovian (Ruzhencev and Bogoslovskaya, 1971;Korn, 1997;Korn et al, 2012;Titus et al, 2015). However, in some regions, such as the South Urals, the Cantabrian Mountains of Spain and the Anti-Atlas of Morocco, the superfamily has a continuous record across the Viséan-Serpukhovian boundary.…”

“…Because of their high value for phylogeny and taxonomy, suture lines have frequently been chosen for detailed investigations of Palaeozoic ammonoids (Kullmann and Wiedmann, 1970;Wiedmann and Kullmann, 1981;Work, 1996, 1997;Korn, 1997;Korn and Klug, 2002) and have also been used for development of quantitative methods to study these structures through time (Boyajian and Lutz, 1992;Pérez-Claros et al, 2002;Allen, 2006Allen, , 2007Saunders et al, 2008;Ubukata et al, 2010Ubukata et al, , 2014Yacobucci and Manship, 2011). Many additional quantitative studies have focused on Post-Paleozoic ammonoids (Olóriz et al, 1997(Olóriz et al, , 1999Pérez-Claros et al, 2007;Yacobucci and Manship, 2011;Pérez-Claros and Bengtson, 2018).…”