What is the difference between an odontocidium vs. ondontoglossum?

[greenpassion]

I believe I have an ondontoglossum and It's flowered a few times, but the flowers aren't fragrant, and although they are large, they don't last more than 2 weeks or so. I'd post a pic but my computers screwed up and won't 'find' the file. Anyway, this orchid was a 'rescue' from my manager, and since I've had it, it put out one spike and flowered within 6 mths of being with me. Then about 6mths later it put out two spikes and flowered. I grow all my orchids in S/H, and well, I'm just curious as to what I actually have here. It does not get full sun. Neither is it on a heat mat, as my other orchids have taken that position. This is in my west facing window. The flowers are about 3" diameter.?