James Hayter converted from 12 yards after Marvin Morgan was ajudged to have handled and, although Stephen McGinn levelled matters midway through the opening period, Paddy Madden's excellent individual strike handed three points to the Glovers.
"It's a huge disappointment," said Turner. "We started the game well and the referee gave a penalty which surprised everyone. I don't even think any of their players appealed.
"We were shocked that the decision went against us but we've got previous with the referee as he erroneously sent Dave McAllister off last time we had him. I don't think anybody could believe the decision he made.
"If a ball is fired or headed against someone who is only a foot away there's no chance to get your hands out of the way. There's no deliberate handball there.
"In the second half we had a real good go, played well and moved the ball around. I think we've got to take some positives from the level of our second half performance.
"We pushed them onto the back foot, caused them some anxious moments and silenced the crowd. We worked the ball into some great positions on a number of occasions.
"We're bitterly disappointed not to come away with something, but the referee has had an influence on the game.
"We won't be happy until we're over the 50 point mark, and then we'll breathe a bit easier."