Abstract
The article reports the finding of some late Paleocene (Thanetian) species of Phaeodarian Radiolaria in phosphorite concretions occurring in the Holmehus Formation of Denmark. These species are associated with a rich assemblage of diatoms and sparse spherical radiolarians. Phaeodarians are very well-preserved in celestobarite (BaSrSO 4) and consist of representatives of the families Challengeridae ( Challengerebium triangulovum nov. sp. and Challengerebium sp.) and particularly Medusettidae ( Medusetta danica nov. sp. and M. densicostata nov. sp.), which are the most frequent. A new genus of medusettid phaeodarians ( Pseudochallengeranium nov. gen.) is also described.
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