Silurian Spanila Barrande, 1881 (Bivalvia, Spanilidae) from European peri-Gondwana (Bohemia, Germany, France, and Austria)

Bulletin of geosciences

Kříž J¹ 

关键词: Bivalvia;    Nepiomorphia;    Silurian;    systematics;    evolution;    palaeoecology;    Perunica;    European peri-Gondwana;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

SilurianSpanilaBarrande,1881(NepiomorphiaKříž,2007)ofPerunicaandtheEuropeanperi-Gondwanacontainstwospecies,Spanilagracilis(MünsterinGoldfuss,1837)andSpaniladiscipulusBarrande,1881.Itrepresentsanimportanttaxon-range-zoneinthemiddleLudfordiantotheearliestPřídolícephalopodlimestonefaciesandmaybecorrelatedwiththeintervalfromtheNeocucullograptuskozlowskiiBiozonetotheearlyMonograptusparultimusBiozone.Semi-infaunalTetinkaBarrande,1881fromtheGorstianofPerunicawasmostprobablytheancestorofSpanila,adaptedtothespecificsemi-infaunalorinfaunalmodeoflife.Theassumptionofsemi-infaunalmodeoflifeissupportedbythecyrtiidbrachiopodepibiontsattachedbytheirtriangularventralinterareatotheposteriorpartoftheshell,presumablyabovethelevelofthesediment.Spanilaoccupiednarrowspacesbetweenthecrowdedcurrent-orientedcylindricalcephalopodshellsandiscommonlypreservedwithconjoinedvalves,ofteninthelivingposition,i.e.withthefrontalfacedownandparallelwithbeddingplane.

【 授权许可】

Unknown