Chaetognaths exhibit the most extensive repertoire of Hox genes among protostomes The evolutionary origins and body plan diversification within bilaterians hinge on our understanding of conserved developmental gene networks across diverse taxa. While significant advances have been ...

#Hox genes #development #zoology #ontogeny #Gnathifera #evolution
Published in January 25 on @biorxivpreprint.bsky.social doi.org/10.1101/2025...) this study shows how the anterior–posterior body axis is established in the chaetognath Spadella cephaloptera, a little-studied marine arrow worm.