With taking into account what was said by >>1219097
These are either on hiatus or cancelled:
Yuri Shoujo - 百合少女
There's the anthology from OKS with Girls Love H, Girls Love Paradise, and Forbidden Sisters, which seems to be ongoing.
Yurikan had three issues in three months, but the latest one came out (very late) December last year.
There shouldn't be any other magazines apart from the three (Tsubomi/Yuri Hime/Hirari). And calling Hirari a yuri magazine is playing it loosely.