نتایج جستجو برای: amphibia
تعداد نتایج: 1766 فیلتر نتایج به سال:
Dendropsophini is the most species-rich tribe within Hylidae with 234 described species. Although cytogenetic information is sparse, chromosome numbers and morphology have been considered as an important character system for systematic inferences in this group. Using a diversity of standard and molecular techniques, we describe the previously unknown karyotypes of the genera Xenohyla, Scarthyla...
A taxonomic consensus for the diverse and pan-global frog family Ranidae is lacking. A recently proposed classification of living amphibians [Frost, D.R., Grant, T., Faivovich, J., Bain, R. H., Haas, A., Haddad, C.F.B., de Sá, R.O., Channing, A., Wilkinson, M., Donnellan, S.C., Raxworthy, C.J., Campbell, J.A., Blotto, B.L., Moler, P., Drewes, R.C., Nussbaum, R.A., Lynch, J.D., Green, D.M., Whee...
A somite pre-pattern is established shortly before visible segmentation. The pre-pattern results from the interaction of two components: a wave of cell behavioural change that passes along the axis, and, an underlying co-ordination of the cells that is the basis for their association into large somite-sized groupings. The evidence is derived from studies of the zones of abnormal segmentation th...
It has been made clear by many studies since G u d e r n a t sc!h (1912) that the bewildering sequel of appearance and disappearance of various organs and tissues during metamorphosis of the amphibia is governed and regulated by thyroid hormone. However, as to the relation of this hormone to various stages of metamorphosis, only a glimpse was gained by works of M i y a s hit a, Nona k a and Yam...
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