Portugal will make their World Cup debut after becoming the last team to reach the World Cup when they beat Uruguay in a two-leg play-off.
Portugal are making their first appearance in the tournament
The Uva twins - captain Vasco and Montpellier lock Goncalo - both make the 30-man squad, while Sevens star Diogo Mateus is also included.
"We have to enjoy each day because this is a lifetime experience," said coach Tomaz Morais.
"To us, we're already the champion team - our World Cup was to get there."
Portugal World Cup squad:
Forwards: Rui Cordeiro, Juan Muré, André Lourenço, Duarte Figueiredo, João Correia, Joaquim Ferreira, Ruben Spachuk, Gonçalo Uva, David Penalva, Marcelo Dias, Diogo Coutinho, Tiago Girão, Juan Somoza, Vasco Uva, João Uva, Paulo Murinello.
Backs: Luis Pissarra, José Pinto, Pedro Cabral, Gonçalo Malheiro, Duarte Pinto, Diogo Mateus, Diogo Gama, Frederico Sousa, Miguel Morais, Pedro Carvalho, António Aguilar, David Mateus, Gonçalo Foro, Pedro Leal.