Palaeoagaracites is an extinct monotypic genus of gilled fungus in the order Agaricales. It contains the single species Palaeoagaracites antiquus. The genus is solely known from the Lower Cretaceous, Upper Albian stage (about 100 Ma), Burmese amber deposits in Myanmar. Palaeoagaracites is one of only five known agaric fungal species known in the fossil record, the oldest to be described, and only genus from Burmese amber.