The following genes with an identifier have been found but that do not have a mapping to Ensembl: 4
http://classic.wikipathways.org/instance/WP378_r116971 Pthr1 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP378_r116971 Pth2r with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP378_r116971 Gpr64 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP378_r116971 Vipr2 with datasource Entrez Gene
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping