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Re: Digit Loss
David Marjanovic wrote:
> What about the hyperphalangy in ichthyosaurs? And isn't the pteroid bone
> pterosaurs analogous to the panda thumb, also an altered (meta)carpal?
> Raymond Thaddeus C. Ancog
> Mines and Geosciences Bureau
Hyperphalangy is the phenomenon that the digits have more phalanges than
usual, not that there are more digits; this is very common in sea-living
tetrapods (sauropterygians, whales). The pteroid bone... hm. Might be the
ossified base of a tendon; it is not a metacarpal.
Sorry, I should have used hyperdactyly, which is also observed in
Raymond Thaddeus C. Ancog
Mines and Geosciences Bureau