Frasnian Atrypida (Brachiopoda) from Silesia (Poland) and the age of The eo-Variscan collision in the Sudetes

Geodiversitas

Adam T. Halamski¹ 

关键词: Brachiopoda;    Atrypida;    Sudetes;    Devonian;    Frasnian;    Variscan orogeny;    new species;    Brachiopodes;    Atrypides;    Sudètes;    Dévonien;    Frasnien;    orogenèse varisque;    espèces nouvelles;   

DOI  :  10.5252/g2013n2a1

学科分类：生物科学（综合）

来源: Museum National d Histoire Naturelle

【 摘 要 】

Frasnian(LateDevonian)Atrypida(Brachiopoda)fromtheŚwiebodziceDepressionintheSudetes(Silesia,south-westernPoland)arerevised.Threespeciesarerecognised.Kyrtatrypabarnimin.sp.isthefirstdescribedLateFrasnianspeciesofthegenusandoneofthelatestrepresentativesofthegenusbeforetheatrypideextinctionattheFrasnian-Famennianboundary.PseudogruenewaldtiatschernyschewiRzhonsnitskaya,1960isdescribedforthefirsttimeoutsidethetypeareaofthespecies,theTimanMts.ItallowstodatetheentirefaunatotheLateFrasnian.Spinatrypamariaetheresiaen.sp.issimilartocoevalS.lambermontensisMottequin,2003andS.rossicaRzhonsnitskayainRzhonsnitskayaetal.,1998inhavingahightongue(lowinmostrepresentativesofthegenus)butdiffersfromtheminornamentationdensity.Thisspeciesisrepresentedbytwomorphotypes;ananalogousdimorphismwasdescribedinsomeSpinatrypinaRzhonsnitskaya,1964.AsynoptictableofDevonianatrypidesfromtheSudetesisgiven.Atpresent,giventhelackofconodontsandunclearstatusofotherdiagnosticmacrofauna,atrypidebrachiopodsarethebesttimemarkersgivingapre-Famennianterminusantequemfortheeo-VariscancollisionofBohemiaandSaxothuringia.

【 授权许可】

Unknown