“Mycoses in reptiles can be cutaneous (dermatomycoses) and/or systemic (pulmonary, renal, hepatic, disseminated, etc). Dermatomycoses in reptiles are practically never restricted to the epidermis. In reptile skin infections, dermal invasion is the rule. Since reptiles possess a very thin layer of connective tissue beneath the dermis (hypodermis), and the dermis often lies directly over subjacent muscles or bone, involvement of deeper tissues is very common when compared to mammals. The most common agent of dermatomycosis in reptiles, the CANV, readily invades the dermis and underlying structures.”…
https://cdn.ymaws.com/members.arav.org/resource/resmgr/Files/Proceedings_2004/2004_16.pdf
https://cdn.ymaws.com/members.arav.org/resource/resmgr/Files/Proceedings_2004/2004_16.pdf