New species of the fungal form-genus MediaverrunitesJarzen & Elsik 1986 ex Nandi & Sinha 2007 are described from tropical to warm temperate Neogene strata. Mediaverrunites fournierii sp. nov. and Mediaverrunites magnus sp. nov. occur in the Lower Miocene of Colombia. Mediaverrunites invaginatus sp. nov. is from the Upper Miocene to Lower Pleistocene, offshore Louisiana. The form-genus is also represented by an apparently undescribed extant species occurring in recent sediment.

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