Dermal

Definition

Pertaining to the dermis, the layer of skin beneath the epidermis that contains connective tissue, blood vessels, nerves, and associated structures. In arthropods, the term is often applied analogously to the hypodermis or underlying tissue beneath the cuticle, particularly in contexts involving parasitism, wound penetration, or toxin delivery. The dermal layer serves structural, nutritive, and sensory functions across animal groups.

Etymology

From Greek derma, skin.

Example

In scabies mites (Sarcoptes scabiei), the female burrows into the dermal layers of mammalian skin to lay eggs, triggering intense inflammatory responses in the host.

Synonyms

• corial

Related Terms

• epidermal
• hypodermis
• Cuticle
• Integument
• subcutaneous
• papillary region
• reticular dermis

Usage Notes

In vertebrate anatomy, "dermal" specifically references the dermis proper. In arthropodology, usage is often looser, sometimes referring to any tissue beneath the cuticle or applied to host skin in parasitological contexts. Contrast with "epidermal" (outer epithelial layer) and "cuticular" (the hardened exoskeletal covering of arthropods). Not to be confused with "Dermaleipa" or similar taxon names.