Geoffroy Saint-Hilaire 1822 + Owen 1848 vertebrate archetype; modular body-plan + cephalization + bilateral symmetry; modern evo-devo Hox-mediated patterning.
Geoffroy Saint-Hilaire 1822 + Owen 1848 vertebrate archetype; modular body-plan + cephalization + bilateral symmetry; modern evo-devo Hox-mediated patterning.