Morto is an Argentine Boa Constrictor. 

These snakes can grow to be over 9 feet long. Their dark brown or black coloration with pale gold or white patterns distinguishes them from other boas. The Argentine boa constrictor is the only boa subspecies listed in Appendix I of the Convention on International Trade in Endangered Species of Wild Fauna and Flora as a critically endangered animal.

ref http://animals.mom.me/argentine-boa-constrictor-endangered-2260.html