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The acritarch  Teleostomata rackii  gen. et sp. nov. is described and illustrated from the Middle Devonian Skały Beds that outcrop at Miłoszów, Holy Cross Mountains, Poland. At the type locality, its stratigraphical range is within the ‘ Geminospora ’  extensa  (Ex) Miospore Zone (=  hemiansatus–varcus  Conodont Zones), which correspond to the early and middle Givetian. The same acritarch has been illustrated from the Eifelian strata of the Gondwanan shelf in Tunisia, but it was unnamed at the time. This acritarch from Miłoszów can be distinguished from other phytoplankton genera of tetrahedral shape because of its broad processes with distal pore-like openings.

Teleostomata rackii gen. et sp. nov.: an acritarch from the Devonian (Givetian) of south-central Poland