Abstract

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.

摘要

acritarch Teleostomata rackii gen。等人。十一月 在波兰圣十字山脉 Miłoszów 露头的中泥盆纪 Skały 层中进行了描述和说明。在模式产地，其地层范围在' Geminospora ' extensa (Ex) Miospore Zone (= hemiansatus-varcus Conodont Zones) 之内，对应于早、中Givetian。突尼斯冈瓦南大陆架的 Eifelian 地层也显示了相同的 acritarch，但当时没有命名。这种来自 Miłoszów 的 acritarch 可以与其他四面体形状的浮游植物属区分开来，因为它具有远端孔状开口的广泛过程。