South Africa have added hooker Bongi Mbonambi to their preparation camp after "miscommunication" saw him initially miss out on the squad.

Springbok head coach Allister Coetzee on Sunday confirmed 18 players who would arrive for a fundamentals, rehabilitation and conditioning camp.

Mbonambi wasn't named in the squad, with Stormers team-mate Scarra Ntubeni also missing out, meaning Adriaan Strauss was the lone hooker.

South Africa did not include any Lions or overseas-based players in the group, leading many to think Malcolm Marx was set for a Bok call-up.

However in an embarrassing twist Mbonambi's name has been added to the squad with a "miscommunication between members of the management" blamed for his original omission. Ntubeni has been confirmed as being dropped, with Marx still a possible inclusion after the Super Rugby final.

South Africa's first camp is being held from August 1-4 as they prepare for their Rugby Championship opener against Argentina on August 20.