Undescribed Archaeocyathid Mass mortalityArchaeocyatha, Vologdin, 1937L. Cambrian (Nevadella perfecta zone)Poleta fmNevada USAUndescribed Cambrian Fossil Archaeocyathid Cambrian Poleta FormationSKU: TDI20240,00 €PriceOut of StockTechnical data:size: slab 14 cm x 5,5 cm archeocyathid 1,5 cm and NO composition restorations: NO RESTORATIONS preparator: Gianpaolo Di Silvestro ref. Wikipedia : Archaeocyatha (or archaeocyathids ancient cups" /ˈɑːrkioʊsaɪəθə/) is a taxon of extinct, sessile, reef-building[1] marine organisms of warm tropical and subtropical waters that lived during the early (lower) Cambrian Period.