Nine rare species of gasteroid and secotioid fungi from Sonora, Mexico are treated here: Agaricus texensis (= Longula texensis), Araneosa columellata, Calvatia bicolor, C. craniiformis, C. pygmaea, Disciseda hyalothrix, D. verrucosa, Endoptychum arizonicum, and D. stuckertii (= Abstoma stuckertii), which is a new combination. SEM micrographs of all studied taxa are included.