Ducks' Niklas Hagman added an empty-net goal with 14.3 seconds left, which earned a point for the Ducks for the ninth consecutive game.
Opposing goalie Jose Theodore made 26 saves for Florida, but wasn't enough to prevent the Panthers from losing their third consecutive game.
The Ducks opened the game on the scoreboard with 7:47 left in the first period on Selanne's 20th goal of the season. It came from a blocked shot from Theodore on Ryan's strike, which was scored off a rebound by Selanne.
Selanne writes his name in the history books as he is the oldest player to score 20 goals in the NHL since Johnny Bucyk did it for the Boston Bruins in 1976-77. The goal also moved past Brendan Shanahan into sole possession of 12th place on the career goals list with 657.
For more news and information on the Anaheim Ducks, Anaheim Calling.