I found this: http://www.self.com/calculatorsprograms/calculators/caloriesburned/Pilates
maybe you can still track your pilates as yoga, but you can change the calories number.
Unfortunately, we don't have a breakdown of calories burned for pilates and that is why it is not listed as a separate item. For now, keep using what you think is the closest. We'll do some research to see if we can find this information. If we do, we'll add pilates to the list.
Thanks,
MedHelp