I can confirm that you can't resurrect any of the summons.
At least not these ones.
Spider, Wolf, Skeleton, Fire Elemental, Ice Elemental.
All that being said the elemental have their effect when they die leaving their respective elemental surface behind. The spider leaving a corpse makes sense as it doesn't seem to be so much an elemental as it is a creature that earth mages can command. Same thing with the wolf.
