Scytalidium dimidiatum


  •    
     Dematiaceous fungus (pigmented) 
       
    Infection: tinea pedis, paronychia, onychomycosis
  • Colony: woolly white (turns gray to olive brown) → reverse gray to black
  • Hyphae: pigmented septate hyphae (hyaline to olive brown)
  • Conidia: thin- to thick-walled round to rectangular arthroconidia
  • Of note, resistant to most antifungals; sensitive to cycloheximide