Mystery orchid

Anyone know what species of Bulbophyllum this might be? Sasha took this photo at the Victoria Orchid Society show a couple of weekends ago.

The plant was labelled Bulb. species. I've browsed through a couple of orchid guides (eg. Botanica's pocket orchids) as well as checking through the bulbophyllum species listed at the Internet Orchid Species Photo Encyclopedia (though not every bulb. species listed, just the bulb. species listed towards the end), but to no avail. There is a bearded orchid (Bulbophyllum barbigerum) but it doesn't look the same.