part of part of sensory system internal ear perilymphatic system UBERON:3000428 This class was sourced from an external ontology (amphibian_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon Consists of enlarged cistern against which the operculum and footplate of the columella rest in the oval window. Together with the endolymphatic systems comprises the membranous labryinth of the inner ear. Duellman and Trueb 1994.