[quote author=richardt link=topic=10920.msg136295#msg136295 date=1329244998
Purists will still say that lager yeasts (S. pastorianus, nee S. carlsbergensis) can fully metabolize melbiose, raffinose, etc. and are genetically distinct from ale yeast (S. cervesiae). Other lager yeast strains include S. bayanus and S. uvarum. Anyone who has watched the hypnotic effects of active fermentation (of any yeast type) in a clear fermentor will agree that there's a lot of movement during fermentation, so it's probably time to stop using the inaccurate terms "top-fermenting" and "bottom-fermenting."
Maybe "cold and warm" fermenting yeast? I guess warm is just relative as I don't think 68 is but 65 is when my heater comes on.