Taylor said: "It looked very much to me as if it was a mistake on the referee's part and that we should have had a penalty just before half-time."
Villa were, however, awarded a second-half spot-kick after a challenge on Gareth Barry in the penalty box by Albion defender Darren Moore.
"Dion was very strong in wanting to take that one but I am very confident it wasn't because it would have given him his 100th goal," said the Villa boss.
Taylor was quick to praise the commitment of his players: "We know what West Brom are about and you have to be prepared to stand up against it and I thought we did that pretty well.
"In the last 20 minutes I felt we were stronger and I was a bit disappointed not to get the victory but it's extended our unbeaten run."
WBA MATCH REPORT