@article {561451, title = {Jaw muscle development as evidence for embryonic repatterning in direct-developing frogs}, journal = {Proceedings of the Royal Society B-Biological Sciences}, volume = {264}, number = {1386}, year = {1997}, note = {

Xy660Times Cited:36Cited References Count:52

}, month = {Sep 22}, pages = {1349-1354}, abstract = {

The Puerto Rican direct-developing frog Eleutherodactylus coqui (Leptodactylidae) displays a novel mode of jaw muscle development for anuran amphibians. Unlike metamorphosing species, several larval-specific features never form in E. coqui; embryonic muscle primordia initially assume an abbreviated, mid-metamorphic configuration that is soon remodelled to form the adult morphology before hatching. Also lacking are both the distinct population of larval myofibres and the conspicuous, larval-to-adult myofibre turnover that are characteristic of muscle development in metamorphosing species. These modifications are part of a comprehensive alteration in embryonic cranial patterning that has accompanied life history evolution in this highly speciose lineage. Embryonic {\textquoteright}repatterning{\textquoteright} in Eleutherodactylus may reflect underlying developmental mechanisms that mediate the integrated evolution of complex structures. Such mechanisms may also facilitate, in organisms with a primitively complex life cycle, the evolutionary dissociation of embryonic, larval, and adult features.

}, keywords = {Behavior, biology, eleutherodactylus-coqui anura, Evolution, expression, head, leptodactylidae, neural-crest migration, pattern-formation, plethodontid salamanders}, isbn = {0962-8452}, author = {Hanken, J. and Klymkowsky, M. W. and Alley, K. E. and Jennings, D. H.} }