contained in existence overlaps material entity anatomical region posterior region of the whole animal juvenile stage postpharyngeal region post-pharyngeal region Posterior to the pharynx. post-pharyngeal post pharyngeal Planarian_Anatomy postpharyngeal region https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4407 adult hermaphrodite asexual adult