The progression of the parahippocampal gyrus over time from its initial formation until its mature state. The parahippocampal gyrus is a ridge in the cerebral cortex. [ http://purl.obolibrary.org/obo/go/references/0000021 GOC:dph GOC:dgh http://openisbn.com/search.php?q=0878937420&isbn=1/ GOC:cls GOC:jid ]