So very sorry for your loss, the position he as sitting is not typical for aestivation, my guess he just died and then the skin dried out, and it is possible this time it has nothing to do with temp swings. Im sure you are very upset with the situation and wish you did things a bit differently. But you know stuff happens to all of us even the most experienced ones, there are definitely things you wish to take back... As long as you lean from your mistakes you can look at it as educational experience. For the next time around you will probably invest in temp/humidity controller, such as hydrotherm.
At at any rate once again im so sorry for your loss, he was a beautiful frog! RIP little one![]()