The Turkish international star and Vidal were both registered yesterday and awarded the 7 and 22 shirt numbers, respectively.
Turan and Vidal were both kept at Barcelona despite being banned from playing due to the FIFA transfer restrictions imposed on the club.
The bearded winger is expected to make his official debut for the club in the Spanish Cup clash against Espanyol in the Last 16 first-leg tie at the Camp Nou.
The 28-year-old has been able to maintain a high level of match fitness due to playing regularly for the Turkish national team playing a key role in the Crescent-Stars reaching the European Championships.
Barcelona squad: Marc-Andre ter Stegen, Jordi Masip, Gerard Pique, Ivan Rakitic, Sergio Busquets, Dani Alves, Arda Turan, Andres Iniesta, Luis Suarez, Lionel Messi, Neymar, Javier Mascherano, Marc Bartra, Munir El Haddadi, Jordi Alba, Aleix Vidal, Thomas Vermaelen, Jeremy Mathieu.