anomaliped
adjective
anom·a·li·ped
əˈnämələˌped
variants or anomalipod
-ˌpäd
: having more or less of the digits united
the kingfisher and the kangaroo are anomaliped
: syndactylic 
Word History
Etymology
French anomalipède, from anomal- + -pède -ped
First Known Use
circa 1835, in the meaning defined above