New Zealand and Auckland left-arm seamer Mitchell McClenaghan will stay back in South Africa for the two-match Test series starting January 2. McClenaghan replaces Tim Southee, who was ruled out last week due to a thumb injury.McClenaghan, 26, played the two Twenty20 internationals on the current tour, picking up a wicket in each game. “With Tim Southee’s injury and Mark Gillespie being unavailable due to injury we have taken the opportunity to add Mitchell McClenaghan to the Test squad for the two match series against South Africa,” New Zealand coach Mike Hesson said. “Mitchell has been an impressive performer over the past couple of domestic seasons and deserves this opportunity following a promising start to International Cricket during the T20 series in South Africa.”Mitchell is a talented and exciting young fast bowler who has the ability to unsettle batsmen with his pace and bounce. We are confident if the opportunity arises during the tour he will perform well during the Test series.”McClenaghan has played 26 first-class matches, collecting 76 wickets at 39.03. This Plunket Shield season, he’s played four matches and taken 14 wickets at 34.85. He said his raw pace was an asset. “I can definitely feel like I can bowl a good spell of heat and hopefully put them on the back foot.”