Peter Fulton is the frontrunner to captain the New Zealand test team if Brendon McCullum is injured.
Speculation rose about McCullum's successor in the various forms when he twinged an abdominal muscle in the final one-day international at Eden Park. There is no vice-captain named in any New Zealand squad; the team prefers to rely on a leadership or strategic group as back-up.
Ross Taylor is out of contention to deputise, despite allegedly being New Zealand Cricket's preferred candidate to lead the test side when a split captaincy was mooted. His unpalatable exit from the job remains too raw and needs further healing, so NZC decided to rely on the leadership group concept rather than broach the subject and risk re-opening the wound.
At 22, Kane Williamson is seen as a work-in-progress.
There is an unwillingness to subject him to more responsibility when maintaining his form in the pivotal No 3 batting position is the priority.