Iouea de Laubenfels, 1955 (fossil sponge) Shortest with AEIOU (and 4 syllables in 5 letters).

Aiouea Aubl. (Lauraceae)

Eydouxia (screw-pine), Euryomia Burmeister, 1842 (beetle), Eumyobia Townsend, 1911 (fly), Joyeuxia Topsent, 1890 (sponge) Shortest with AEIOUY.

Sticharthropterus (beetle), Trichopentarthrum (beetle) Longest with AEIOU.

Antistrephorrhynchus (extinct crustacean) Longest with AEIOUY.

Lamelligomphus Fraser, 1922 (dragonfly), Phragelliorhynchus (protozoan) Longest with AEIOU in order (without and with Y).

annelidous ("pertaining to segmented worms") and adecticous ("with immobile mandibles", of pupae) Shortest biological words with AEIOU in order.

Muroidea (rodent), Suoidea (superfamily including pigs), Juloidea(superfamily of millipedes) Shortest with AEIOU in reverse order.

Punctoschmidtella (crustacean) Longest with AEIOU in reverse order.

Haemodipsus lyriocephalus (louse) All vowels in each name.

Cochlearius cochlearius cochlearius (boat-billed heron) - all 5 vowels in each name.

Ussolzewiechinogammarus (crustacean) Longest word which uses each vowel exactly twice.

Corrugatocephalum ouei (marine cestode tapeworm from megamouth sharks)

Ia io (vespertilionid bat) Only all-vowel binomial.

Cyclostremiscus beauii (Prosobranch gastropod from Florida) Five consecutive vowels

Iyaiyai Evenhuis, 1994 (fossil chaoborid fly) Seven consecutive vowels.

Loxolophodon (Eocene ungulate) Five o's in 12 characters.