A rudimentary additional digit-like structure on the preaxial side of the thumb of certain amphibians and mammals[dictionary.com]. [ http://dictionary.com ]

This is just here as a test because I lose it

Term information

comment

not homologous to digit 1 of tetrapods. Note we treat the prepollex as distinct from the digits, which are not part of the carpus

definition

A rudimentary additional digit-like structure on the preaxial side of the thumb of certain amphibians and mammals[dictionary.com].

external definition

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]

has related synonym

pseudothumb

id

UBERON:0005880