There is a bit of mess with the names. This is a cultivar of Ph. domesticum named 'Ilsemanii'.
In literature you can read about a species Ph. ilsemanii. It is synonimized it with Ph. ornatum Schott 1853 - see here.
You can see photos of Ph. ornatum here and it looks much differently.
More to add - the species Ph. domesticum is also not accepted by many botanists.
|Tropicos: Philodendron domesticum|