Perhaps like a limb with multiple digits? The team will also try reintroducing the genes in tetrapod species, which normally lack the genes, to see how they affect limb development. "We will continue ...
Fins and limbs and fins into limbs : the historical context, 1840-1940 / Peter J. Bowler -- Skeletal changes in the transition from fins to limbs / Michael I. Coates and Marcello Ruta -- A historical ...