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In the evolution of land-living vertebrates, the transition from spending the entire life cycle in the water to first a biphasic (adult on land, eggs and larvae in water) and later a terrestrial life-history mode was achieved by changes in developmental processes and regulatory mechanisms. Lungfishes, salamanders and frogs are studied as examples of species which span this transition. The migration...
Vertebrate head development is a classical topic lately invigorated by methodological as well as conceptual advances. In contrast to the classical segmentalist views going back to idealistic morphology, the head is now seen not as simply an extension of the trunk, but as a structure patterned by different mechanisms and tissues. Whereas the trunk paraxial mesoderm imposes its segmental pattern on...
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