part_of part of part of contained in existence overlaps material entity peripheral nervous system sensory system anterior region of the whole animal dorsal region of the whole animal juvenile stage head region organ auricle A sense organ located along the dorsolateral head margin. The auricular groove is highly innervtated by ciliated sensory neurons, and has an altered epidermis devoid of rhabdites and gland cells. PMID:28495872 Planarian_Anatomy PMID:30399335 PMID:30485821 ISBN:9780070316607 https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4407 PMID:27800171 adult hermaphrodite asexual adult