Correction: Dorsoventral Patterning in Hemichordates: Insights into Early Chordate Evolution

Abstract

The in situ staining patterns of Fig 4C and 4D were incorrectly assigned to the nkx2.2 gene of Saccoglossus kowalevskii. Subsequent sequencing and analysis has shown that these images were actually expression patterns for the foxA gene. Fig 4 has been updated with images of the in situ staining patterns of the nkx2.2 gene of Saccoglossus kowalevskii and the figure legend has been amended to reflect this. The corrected legend for Fig 4 appears below.