A rudimentary additional digit-like structure on the preaxial side of the thumb of certain amphibians and mammals[dictionary.com]. [ http://dictionary.com ]
Term information
not homologous to digit 1 of tetrapods. Note we treat the prepollex as distinct from the digits, which are not part of the carpus
Two or more elements located ventral and medial to the metacarpal of digit II(I). The proximal prepollex is small and round whereas distal prepollex 1 is usually large and wedge-shaped. When more elements are present, they are smaller than previous elements.[AAO]
Term relations
- autopodial extension
- has skeleton some prepollex skeleton
- part of some carpal region
- preaxialmost part of some carpal region