[Arran]

It's definitely not mahogany, mahoganies of all species have an open grain, even more so then walnut. But the veneer they used has a tight closed grain like poplar, maple, birch, or beech has. Sometimes poplar does display some interesting grain, like spalting or fungus stains, as does maple, but more often then not it's just a bland white wood. Beech looks like maple but has more of an orange colour to it, birch is whitish but it has more of a grain to it then either beech or maple. If they knew that the wood was going to be finished dark they would have used whatever hardwood was cheap and available, I've even seen ash used for this.
Regards
Arran