Nature Communications 4: Article number: 1828 (2013); Published: 7 May 2013; Updated: 11 February 2014.

In this Article, the museum catalogue numbers for the paratype and referred specimens of Acrotholus audeti nov. gen. et. sp. were inadvertently exchanged. The paratype reference should have been ROM 2964 and the catalogue number for the referred specimen should have been ROM 2962.