Advances in Amphibian Research in the Former Soviet Union, Volumes 1-2; Volumes 5-10

active feeding Alizarin anlage anteriorly anurans articulation ascending process attached axolotl begins to grow bone increment bony cartilage cartilaginous caud chondrified chondrocranium collagen fibers commissure compound bone coronoid cranial base cranial roof crossopterygians dentary dermal bones dorsal end of metamorphosis endochondral ossifications frontal frontoparietal fuse hynobiids ichthyostegids internal structure Jarvik karelinii keyserlingii lacrimal larva at Stage larvae larval period lateral wall Lebedkina maxilla maxillary arch Meckel's cartilage medial mesenchymal mexicanum morphology mouth formation nasal capsule nasolacrimal duct neurocranium ontogeny osteolepiforms otic capsule otic process outgrowth overlaps palatal arch palatopterygoid palatoquadrate parasphenoid parietal pasp pila antotica porolepiforms posterior portion posteriorly ppalp praeoperculo-squamosum prechondral prefrontal premaxilla premetamorphic period premetamorphosis preopercula pterygoid process ptpal recent amphibians resorption rhipidistians rostral salamandrids sibiricus skull roofing bones species split lines squamosal stegocephalians teeth tetrapods tissue tooth row trabeculae transition to active upper jaw bones urodelans vomer waltl whereas zone of bone