The foraminiferal zonal scale of the Devonian–Carboniferous boundary beds in Russia and Western Kazakhstan and its correlation with ammonoid and conodont scales

Middle to Late Mississippian and Early Pennsylvanian foraminiferal zonal scheme of South China—a case study from the Youjiang Basin: biostratigraphical and palaeobiogeographical implications

“…The zone is correlated to the Eostaffellina protvae Zone of Lipina & Reitlinger (1971) and Gibshman (2003), the Eostaffellina paraprotvae Zone of Kulagina et al (2019), and the Monotaxinoides subplanus-Eostaffellina actuosa Zone of Kulagina et al (2014), which are typical of the Protvian Substage of the Russian Platform. It must be highlighted that owing to the problem related to the use of E. paraprotvae and E. protvae, two species that are possible synonyms from the type material (Brenckle 2005), which has been discussed in Cózar & Somerville (2016), Gibshman ( 2019) defined E. protvaensis as new replacement species name for E. protvae.…”

“…But it should be noted that the taxon has been documented from the upper part of the lower Serpukhovian in Ukraine and Britain (Aizenverg et al 1983;Cózar & Somerville 2021a). Therefore, the zone might be correlated with the top of the Steshevian Substage or the base of the Protvian Substage of the Russian Platform Gibshman 2003;Kabanov et al 2016). The absence of typical markers (i.e., larger and rounded species of Eostaffellina) for the late Serpukhovian in this zone, but their presence in younger levels in the platform, suggests that this zone most likely corresponds to the uppermost part of the Steshevian Substage.…”

The Devonian-Carboniferous Boundary around the globe: a complement

“…The DCB is indicated with the red dotted line. The column Omolon Massif (Russia) proposes 2 boundary positions depending on the interpretation of the available data (see Kulagina et al 2021;Poty 1999). Plain numbers make references to the beds, where the DCB has been identified precisely; numbers in italics are references to sample numbers or beds, which are used for placing the DCB.…”

Vertebrate diversity reveals perturbations in faunal communities prior to the Hangenberg event in the Montagne Noire (France)

“…1). While crises and post-crisis recovery periods have been widely studied, most investigations focused on the aspect of faunal renewal at the species level (Girard 1994, Ziegler & Lane 1987, Lelievre & Derycke 1998, Kulagina et al 2021. This approach accentuates the catastrophic nature of the crises by highlighting extinctions followed by the appearance of new species in periods that are by definition exceptional.…”