The conidiomata of convex scutella with radiating threads of cells connected to the substratum of type specimen are similar to other genera of Tubakiaceae. However, the genera having hyaline conidia arranged in a line are excluded from Tubakia sensu stricto. Racheliella saprophytica is characterized by crustose conidiomata and it is different from all other genera of Tubakiaceae in having branched, septate conidiophores with phialidic conidiogenous cells provided with flared, conspicuous collarettes with serrate margins (Braun et al. 2018).