part of part of chondrocranium cartilage element of chondrocranium braincase and otic capsule skeleton pila preoptica 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 UBERON:3010565 A strut of cartilage extending dorsally from the basal plate and with other similar cartilages forming the sides of the brain case. Posterior to the pila preoptica is the pila antoptica between these two cartilages emerges the optic and trochlear nerves.