IOUEA: A Cretaceous Coup

Dmitri Borgmann, in Vowel Patterns in his book Language on Vacation (Scribner\u27s, 1965), muses on the finding of what would be the \u27ultimate triumph\u27 a 5-letter word constructed from one each of the five vowels A, E, I, O, and U. If you turn to page 638 of The Encyclopedia of Paleontology (Dowden, Hutchinson& Ross, 1979), edited by Rhodes W. Fairbridge and David Jablonski, you will find IOUEA, the name of a Cretaceous fossil sponge genus