from The Century Dictionary and Cyclopedia
- n. Same as hyperphalangism.
Sorry, no etymologies found.
Stuff such as the hyperphalangy and polydactyly that evolved in the limbs of some lineages, the well-known story of how soft-tissue-bearing specimens were first discovered, and all that data from Holzmaden (and other places) on ichthyosaur birth and babies.
Furthermore, some underwater fliers (e.g., sealions) do not exhibit hyperphalangy.
So there is no clear correlation between hyperphalangy and flight.