Longest suspended animation - molluscs

In 1846, two specimens of the desert snail (Eremina desertorum) were presented to the British Museum (Natural History) as dead exhibits. They were glued on a small tablet and placed on display. Four years later, in March 1850, the Museum staff, suspecting that one of the snails was still alive, removed it from the tablet and placed it in tepid water. The snail moved and later began to feed. This hardy little creature lived for a further two years before it fell into a torpor and died.