Remarkably, the 24-year-old took eight catches to help dismiss Wellington for 389 in its first innings at the Basin Reserve yesterday.
It was the most catches made in an innings in New Zealand first-class cricket and the haul has given him a share of the world record.
Six others have also made eight catches in an innings.
"I'm not sure it has really sunk in yet," de Boorder said.
"It is just one of those things, I suppose.
The bowlers got it in the right areas and the batsman managed to nick it to me."
De Boorder was well aware the record was approaching.
It was hard to forget with his team-mates giving him a gentle ribbing, reminding him not to drop it.
All-rounder Sam Wells set the stage when he got a delivery to take the edge of Ili Tugaga's bat.
De Boorder did the rest, diving forward to take the catch.
Having been out in the middle for just over 125 overs, de Boorder did well to maintain his concentration and grasp the sharp chance.
While eight is great, two players have taken nine dismissals in an innings.
Tahir Rashid (eight catches, one stumping) effected nine dismissals for Habib Bank against PACO in Gujranwala in 1992-93 and Wayne James (seven catches, two stumpings) repeated the feat for Matabeleland against Mashonaland CD in Bulawayo in 1995-96.
De Boorder's eight scalps took him past Otago's Martin Croy, Northern Districts' Byran Young and Central Districts pair Robin Schofield and Bevan Griggs, all of whom took seven catches.
Northern Districts gloveman Peter McGlashan broke the world record for catches in a first-class match when he grabbed 12 earlier this summer.
De Boorder needs another five catches in Wellington's second dig to better that mark.
Watch this space.
