The following genes with an identifier have been found but that do not have a mapping to Ensembl: 2
http://classic.wikipathways.org/instance/WP5490_r137747 G-beta with datasource InterPro
http://classic.wikipathways.org/instance/WP5490_r137747 G-gamma with datasource InterPro
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping