Life expectancy of the pancake tortoise?

[EKLC]

I am seeing a 20-30 year estimate searching the web, but these are in brief species descriptions and are probably parroted from somewhere. Perhaps a few zoo specimens lived this long, but that does not mean this is their life expectancy. I know in biology it is common for smaller animals to have shorter lifespans, but don't pancakes really have the same "machinery" as larger tortoises (rear-gut fermenters, etc)? Any input?

 

[african cake queen]

hi, i do not think so. not much room in a cake.