Early Iron Deposition in Teeth of the Streamside Salamander, Ambystoma barbouri

摘要: Abstract In some salamander species, as well various other vertebrates, iron-rich molecules are sequestered in the enamel and enameloid layers of crowns teeth. adults, presence iron can be detected easily because cusps often tinted orange-brown. However, visual confirmation is not possible embryos or larvae. Consequently, ontogenetic stage during which first deposited teeth known. We used scanning electron microscopy energy dispersive X-ray spectroscopy to examine embryonic larval Streamside Salamanders, Ambystoma barbouri, determine earliest developmental quantify relative concentration along length cap. Iron was present first-generation when individuals were still acquiring nutrients from yolk, suggesting that rather than diet, source early generation salamanders. Furthermore, as...