Difficult. Looks more like dinos to me. But if it has no air bubbles and does not grow at a tremendous rate then I could be wrong. The appearence is defanitly closer to dino than cyano.
OK, update:
I did a 10% water change and sucked up a lot of this stuff. I stirred the bucket up a lot and poured a quart of water through a coffee filter into a jar and put it under some lights in the kitchen. After 2 hours there was no reassembly of anything, so...brown cyano?