Mvovo replaced Ruan Combrink after he was ruled out for six weeks having fractured his fibula in the 26-24 loss to Argentina in Salta on Saturday.
Scrumhalf Francois Hougaard, named in the squad for the Southern Hemisphere championship but not considered for the two matches against Argentina due to a knee injury, has also rejoined the squad.
Flyhalf Elton Jantjies left the field early in the second half in Salta with a bruised thigh muscle but has been cleared to tour, though he remains a doubt for the test against Australia in Brisbane on Sept. 10.
The Springboks travel to Christchurch to face tournament leaders New Zealand a week later.
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Squad: Backs: Damian de Allende, Juan de Jongh (Stormers), Faf de Klerk (Lions), Johan Goosen (Racing Metro), Bryan Habana (Toulon), Francois Hougaard (Worcester), Elton Jantjies (Lions), Jesse Kriel (Bulls), Lionel Mapoe (Lions), Lwazi Mvovo (Sharks), Rudy Paige (Bulls), Morne Steyn (Stade Francais). Forwards: Lourens Adriaanse (Sharks), Lood de Jager (Cheetahs), Pieter-Steph du Toit, Eben Etzebeth (Stormers), Steven Kitshoff (Bordeaux), Vincent Koch (Stormers), Jaco Kriel (Lions), Francois Louw (Bath), Malcolm Marx (Lions), Bongi Mbonambi (Stormers), Teboho Mohoje (Cheetahs), Franco Mostert (Lions), Tendai Mtawarira (Sharks), Trevor Nyakane (Bulls), Adriaan Strauss (Bulls), Warren Whiteley (Lions).
(Reporting by Nick Said, editing by Ed Osmond)
