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Tytuł: Crinoids from the Famennian of the Holy Cross Mountains, Poland
Autor: Głuchowski, Edward
Słowa kluczowe: Crinoidea; Extinction; Famennian; Holy Cross Mountains; Recovery; Poland
Data wydania: 2002
Źródło: Acta Palaeontologica Polonica, (2002), no. 2, s. 319-328
Abstrakt: Disarticulated crinoid columnals and pluricolumnals from the Famennian of the Holy Cross area were analysed. Sixteen crinoid taxa were distinguished, only one of which is based on stems attributed to a calyx-based genus, and the others are classified within artificial supraspecific units. Two of these are new: Schyschcatocrinus levis sp. nov. and Cosmocrinus polonicus sp. nov. The described crinoid fauna shows distinct extinction-recovery temporal pattern: the Frasnian-Famennian crisis affected 50% of stem-based families and 70% of late Frasnian stem-based genera. The succession of crinoid faunas represented by three faunal intervals has been identified and correlated to standard conodont zones: FIa, Palmatolepis triangularis Zone (relic "Frasnian" crinoid assemblage Schyschcatocrinus delicatus-Calleocrinus kielcensis), FIb, Pa. crepida to Pa. marginifera zones (crinoid assemblage Calleocrinus kielcensis-Schyschcatocrinus levis) and FIc, Pa. trachytera to S. praesulcata zones (crinoid assemblage Cosmocrinus polonicus-Acbastaucrinus affectatus). The succession was controlled mostly by eustatic factors.
ISSN: 0567-7920
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