Hello Angel.  I just hatched out a few amazonicus after 17 weeks from pick date.  Peat was stored slightly damp, and temperatures probably averaged 70 degrees for most of the incubation period.  I had checked eggs at 14 weeks and didn’t find any that were well developed. 

There look to be about 2 dozen fry, about 1/3 are sliders.  They took a day to hatch after immersion, so I’m thinking they weren’t overdue.  No doubt different temperature and humidity would make a difference in development time as well. 

Good luck…