caa a22 4500 475767802 CHVBK 20180406123611.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/s004270000070 doi (NATIONALLICENCE)springer-10.1007/s004270000070 Opercular development and ontogenetic re-organization in a direct-developing frog [Elektronische Daten] [Elizabeth M. Callery, Richard P. Elinson] Abstract : The direct-developing frog, Eleutherodactylus coqui, has eliminated the tadpole stage from its ontogeny, and lacks many larval characters. We demonstrate that the dermal folds of E. coqui are homologous with the opercular folds of metamorphosing frogs. In both E. coqui and its metamorphic counterparts the opercular folds grow over the developing forelimb before perforating to free the entrapped limb. Opercular perforation in E. coqui occurs even in the absence of the forelimb but shows no signs of thyroid hormone dependence. The condensation of E. coqui development appears due to the excision of the extended larval period of developmental stasis. Analysis of opercular development, when viewed in conjunction with other developmental characters, suggests the ontogenetic period in the ancestral Eleutherodactylus life-history from which the tadpole was likely eliminated. Springer-Verlag Berlin Heidelberg, 2000 Key words Direct development nationallicence Eleutherodactylus nationallicence Frog nationallicence Opercular fold nationallicence Larva nationallicence Callery Elizabeth M. Department of Anatomy and Cell Biology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada, CA aut Elinson Richard P. Department of Anatomy and Cell Biology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada, CA aut https://doi.org/10.1007/s004270000070 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004270000070 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Callery Elizabeth M. Department of Anatomy and Cell Biology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada, CA aut NATIONALLICENCE 700 1- Elinson Richard P. Department of Anatomy and Cell Biology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada, CA aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer