part of part of acellular anatomical structure dermis collagenous dermal stroma UBERON:2001186 ZFA:0001186 primary dermal stroma A layer of collagen fibrils present in the imature integument in an acellular subepidermal space. At first, the fibrils are all oriented in the same direction, later they form the complex plywood-like structure that is characteristic of the dermal deep region. Le Guellec et al, 2004. This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon