This document introduces a new fungal genus, Arachium, based on molecular and morphological analyses of species Aseroefloriformis and Phallusroseus. The study emphasizes the phylogenetic relationships within the Phallales order and proposes revisions to the classification of several genera, notably the reassessment of Itajahya. The findings are supported by extensive phylogenetic analyses that reinforce the distinctiveness of the newly established genus and the emendation of the Clathraceae family.