Coelacanths were once thought to have undergone extinction 66 million years ago during the Cretaceous–Paleogene extinction event. ... The fossil record is unique because coelacanth fossils were found 100 years before the first live specimen was identified.
The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night
