Lebedeva et al. show that unlike Bilateria, the embryo of the cnidarian Nematostella specifies its endomesoderm in the β-catenin-negative domain. In contrast, subsequent β-catenin-dependent axial patterning acts similarly in Cnidaria and Bilateria.
- Tatiana Lebedeva
- Johan Boström
- Grigory Genikhovich
