Having entered round seven of the competition in fourth place and running short of time to mount a serious title push, Auckland started well today in their attempt to overtake Otago on the standings.
After being inserted by Otago captain Derek de Boorder at Eden Park's outer oval, the hosts advanced to 400-7 at stumps and snatched four batting bonus points in the process.
Significant credit belonged to Munro, who notched his fifth first class century before being removed late in the day for 156 from 141 balls. With Auckland on 104-2 when he came to the crease, Munro enjoyed a 193-run stand with Colin de Grandhomme (83) for the fourth wicket to set his side up for a mammoth score.
But, after Munro brought up his milestone in the final session, he and de Grandhomme were dismissed in consecutive overs by Neil Wagner, part of the New Zealand's paceman's 3-77.
Two further wickets fell before stumps as Otago's bowlers earned three bonus points, but the opening day still belonged to Munro, who will have designs on adding to his one test cap.
Elsewhere, a century from another batsman on the fringes of the New Zealand set-up saw Northern Districts take a similarly-commanding position against Canterbury in Gisborne.
Daniel Flynn's 16th first class ton saw ND recover from the loss of Brad Wilson in the opening over and helped validate his own decision to bat at Harry Barker Reserve.
Flynn put on 144 with Joe Carter (64) for the second wicket before Andrew Ellis (4-70) tore through the hosts' middle order and left them in the unconvincing position of 228-6.
But Bharat Popli and Mitchell Santner - a pair with fewer than 10 games' first class experience between them - combined to advance their side to 341-6 at stumps, with both men making unbeaten half centuries.
Northern Districts, marooned at the bottom of the table, will be desperate for victory against first-placed Canterbury, with defeat opening an almost insurmountable deficit.
Meanwhile, the wickets continued to tumble at McLean Park in Napier, the scene of last week's three-day win for Central Districts. The hosts again used the conditions to their advantage against Wellington today, rolling the second-placed visitors for 172 in 51 overs after they elected to bat first.
A first-wicket stand of 68 between Josh Brodie (51) and Michael Papps (45) was as good as it got for Wellington, with Kieran Noema-Barnett, Doug Bracewell and Bevan Small combining for all 10 wickets.
In reply, CD reached 103-5 at stumps, with Carl Cachopa and Kruger van Wyk to resume tomorrow.
