It's the new endurance series that CFR/Florida Region are promoting. Info found here: http://www.tesracing.com/ They look like they will be run in conjunction with the ECR, but it will allow Florida drivers to compete for an endurance championship without having to travel as far as the Carolinas to get enough races in to be competitive in the series points battle.
That's correct. I apologize for mis-speaking. From the TES website- "Most, but not all, of the Tropical Endurance Series races will be held in conjunction with regularly scheduled ECR races." I would assume that would mean that the four TES races held at the Florida Region tracks will all be ECR's as well, but none of the CFR races will.