bone fossa posttemporal fossa This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon ZFA:0005628 Chen 1994 gives these two synonyms: 'temporal fossa', Gauba 1967; and 'temporal groove', Mahajan 1966. Fossa where the exoccipital forms the medial portion and the epioccipital forms the lateral margin. The posttemporal fossa in most species has two openings separated by the epioccipital bridge. temporal groove temporal fossa UBERON:2001753