The xenacoelomorph gonopore is homologous to the bilaterian anus
Carmen Andrikou, Kevin Pang, Aina Børve, Tsai-Ming Lu, Andreas Hejnol
The paper shows that xenacoelomorph male gonopore expresses bilaterian hindgut marker genes, suggesting it is homologous to the bilaterian anus.
bioRxiv · Feb 10, 2025 · PreprintDevelopmental Biology