A third opening of the posttemporal fossa posteriorly located relative to the fossa. It is bordered completely by the epiocciptial, or by both the epioccipital and exoccipital.
Comment:
Present in some characiforms.; [provenance-note] "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" xsd:string {source="http://purl.obolibrary.org/obo/tao.owl"}