Arthroderma ciferrii is able to grow at 34◦C in contrast to T. onychocola and the colonies of the ex-type strain CBS 272.66 attained a diameter of 9–11 mm after 7 days on MEA at 30◦C in contrast to 5–8 mm large colonies of T. onychocola.
Other differences can be found in the shape and dimensions of peridial cell