Boult has played 30 tests but only 10 one-day internationals since his New Zealand debut in 2011. He has 110 wickets in tests at an average of 27.4 and only 10 in ODIs at 39.6. [Indian squad for WC 2015 announced]
But he has become the spearhead of the New Zealand attack, taking 38 wickets in tests in the past 12 months and returned to the one-day side for matches against South Africa in October.
Veteran seamer Kyle Mills edged youngster Matt Henry to claim another of the fast bowling spots, alongside Boult, Tim Southee, Mitchell McClenaghan and tearaway Adam Milne.
Left-arm spinner Daniel Vettori, who will turn 36 during the tournament and is a veteran of 280 one-day internationals, has been selected but may take a secondary role behind off-spinner and all-rounder Nathan McCullum.
Grant Elliott is a surprise selection, winning a position as an all-rounder ahead of Jimmy Neesham. Elliott played the most-recent of his 51 one-day internationals in November, 2013.
A lot of bowlers have performed brilliantly for us over the past couple of seasons which certainly made if difficult but we think we have the right mix," coach Mike Hesson said.
"Our batting unit has good depth and Grant (Elliot's) inclusion assures us strong cover in the middle order. He brings a lot of experience and his record in New Zealand and Australian conditions is excellent."
Opener Martin Guptill retained his place despite indifferent recent form -- he has a highest score of 58 since his century against India in January -- but he has started to show form in domestic matches.
Tom Latham, who has recently clinched the test opening role, will bat in the middle order. Captain Brendon McCullum described the squad as the strongest New Zealand World Cup line-up he has been associated with. New Zealand will play the opening match of the World Cup against Sri Lanka in Christchurch on February 14.
The Black Caps will also play two warm-up games against Zimbabwe and South Africa on February 9 and 11, respectively.
NEW ZEALAND SQUAD FOR 2015 WC
Brendon McCullum (captain), Corey Anderson, Trent Boult, Grant Elliott, Martin Guptill, Tom Latham, Mitchell McClenaghan, Nathan McCullum, Kyle Mills, Adam Milne, Luke Ronchi, Tim Southee, Ross Taylor, Dan Vettori, Kane Williamson.
NEW ZEALAND'S ITINERARY AT WC 2015
vs Sri Lanka (Feb 14), vs Scotland (Mar 17), vs England (Feb 20), vs Australia (Feb 28), vs Afghanistan (Mar 8), vs Bangladesh (Mar 13)