Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland

摘要: The dominant factor in faunal succession of conodonts the Frasnian Poland is apparent immigration species originating allopatrically other regions. Each event usually changes population variability a local (character displacement). Only few lineages show their phyletic evolution within studied area. Attempts to distinguish conodont on basis platform element shape failed some latest palmatolepidids. Even at apparatus−based generic level, certain ramiform elements apparatus appear much more diagnostic than platforms. Correlative value late palmatolepidids unknown structure thus questionable. Ancyrodella offers solid for age determination although great makes resolution rather low and requires approach. panderodontids Belodella(?) tenuiserrata sp., B. minutidentata sp. nov., robustidentata prioniodontid Icriodus kielcensis enigmatic monospecific Playfordiidae fam. prioniodinids Dyminodina planidentata gen. et D. anterodenticulata kovalensis Pluckidina P. slupiensis robustipegmata lagoviensis derived polygnathid Avignathus bifurcatus probably sec− ondarily simplified Nicollidina Kielcelepis Lagovilepis nov. Klapperilepis are proposed.