Amanita theophili sp. nov., a member of Amanita sect. Amidella (Amanitaceae), is described from temperate pine‐oak forests in Morelos, central Mexico. Morphological features and phylogenetic analyses based on ITS and 28S rDNA sequences confirm its distinct taxonomic status. The new species is morphologically similar to A. peckiana and A. volvata and phylogenetically related to A. rufobrunnescens and Amanita ‘insolens', and the distinctions are discussed here. This species adds to the two previously recognized members of sect. Amidella in Mexico and to the approximately 30 species known worldwide. The discovery expands the documented diversity of Amanita sect. Amidella .