The dermis is a layer of skin between the epidermis (with which it makes up the skin) and subcutaneous tissues, and is composed of two layers, the papillary and reticular dermis[WP].
Comment:
[homology-note] "When approaching controversies surrounding skin evolution, we need to remember that the skin consists of two layers, an epidermis and a dermis, not a single evolving structure. (...) It is little wonder that controversies about homology exist. If we think of the epidermis, the dermis, and their interactions as an evolving unit, then their specialized products (hair, feathers, and reptilian scales) are broadly homologous.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000108", ontology="VHOG", source="ISBN:978-0072528305 Kardong KV, Vertebrates: Comparative Anatomy, Function, Evolution (2006) p.231-232 see also p.209 and p.228 and Figure 6-1", source="http://bgee.unil.ch/"}