John Hughes accused St Mirren striker Collin Quaner of conning the ref to win the crucial penalty in Paisley.
The Buddies sub went tumbling in the box as Jamie McGrath slammed home from the spot to leave Yogi raging.
He said: “I’m not going to point the finger at the ref. He made an honest decision but once he sees it he’ll know he’s been conned so it’s about the authorities to do something about that.
“Referees have a tough job and you have to make a decision instantly, I can see it after the game. When it happened our video guy said it was never a penalty so he’s been conned.
“He will realise he’s made the wrong decision. He flung his leg out there, it’s not even a free-kick in the middle of pitch. We’re bitterly disappointed.
“With what’s at stake, boys playing for livelihoods, you’re wanting these decisions to be correct but who would be a ref. He gets paid and he needs to make it spot on. I wish it was my team. If that’s where the game has gone maybe we’re too honest.
“We need to use it as fuel to make sure it doesn’t happen again.”
Hughes was gutted not to build on last week’s win against Celtic and ease their Scottish Premiership relegation fears.
He said: “In the first half we weren’t at it. I was bitterly disappointed after what we gave against Celtic in terms of effort and getting about people.
“We were second best, that’s why we shook it up. We were hanging in there first half, made subs, had a better focal point up front and put more legs in midfield. We had the better second half chances.
“The first bit of football we played Jordan had the header and it was a great save.”
