@viper69 I am completely new to this species so I cant give you all the details.
I got 3 juveniles in local pickup Labelled Euathlus sp. black. This is subadult(guessing) male.
All I got was the name from Chilean hobbyists(after a lot of digging). Its one of the larger Euathlus. Growth rate quite steady too. 2 moults in 6 months from all 3. The costera(coastal) variant is darker than the normal crema.