A new ostracodes from the Devonian-Carboniferous boundary deposits of Pechora-Kozhva Uplift

Sobolev, D. B.

doi:10.19110/0568-6156-2019-1-8

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“…Ostracods from the Famennian and early Carboniferous (Strunian, Tournaisian and Visean) have already been documented from Australia (e.g., Jones 1968Jones , 2011, Belgium (e.g., Lethiers 1982;Crasquin 1984aCrasquin , 1986Crasquin-Soleau 1988;Casier et al 2004Casier et al , 2005, Canada (e.g., Green 1963;Lethiers , 1982Dewey 1983;Crasquin 1984;Crasquin et al 1986), France (e.g., Lethiers 1982 ;Crasquin 1984Crasquin , 1986Casier & Préat 2003;Casier et al 2001Casier et al , 2002, Germany (e.g., Kummerow 1939;Becker et al 1993;Blumenstengel 1993Blumenstengel , 1995Blumenstengel et al 1997), North-western China (e.g., Song & Gong 2015;Song et al 2018), South China (e.g., Coen 1989Olempska 1999;Song & Gong 2019), Poland (e.g., Błaszyk & Natusiewicz 1973;Olempska 1981Olempska , 1997, Russia (e.g., Jones 1901;Batalina 1924;Buschmina 1975Buschmina , 1986Kotschetkova 1980;Buschmina et al 1984;Sobolev 2019Sobolev , 2020Zhuravlev & GUILLAM E. et al, Devonian-Carboniferous ostracods from South China Sobolev 2018…”

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confidence: 99%

Late Devonian–early Carboniferous ostracods (Crustacea) from South China: taxonomy, diversity and implications

Guillam¹,

Forel²,

Song

et al. 2022

EJT

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The impact of the late Devonian Hangenberg Event on ostracods is quantified for the first time from newly acquired data from the Blue Snake section, Guizhou Province, South China. Ninety–eight species belonging to 31 genera are identified and figured. Four new species are described: Clavofabella? lanshella sp. nov., Sansabella gelaohensis sp. nov., Cytherellina caerulea sp. nov., Sulcella baisuzhena sp. nov. The ostracod associations from the Blue Snake section document a significant drop in specific diversity as well as major changes in taxonomic composition through the Hangenberg Event. We here report the reduction of the proportion of Palaeocopida and the increase in that of Podocopida between the latest Famennian and the Tournaisian. The specific extinction and renewal rates are estimated at 44% and 62%, respectively. The main factor of the post–crisis renewal of ostracod faunas in the Blue Snake section appears to be the progressive diversification of the family Bairdiidae and was probably related to palaeoenvironmental changes. The characteristics of associations point to an increase of the water depth over the studied area, from a near–shore shallow environment during the latest Famennian to a deeper and more open offshore environment during the Tournaisian.

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