| Type | MGI:General | Description | additional posterior digit composed of partial or complete metacarpal/metatarsal and 1-2 phalanges metacarpal/metatarsal usually fused with equivalent bones of digit V additional phalange-like elements between digit V and supernumerary digit in rare cases half of hind limbs with a thin digit-like structure ventral to digit I, contains metatarsal and 1-2 phalanges distal phalange of extra ventral digit sometimes attached to the distal phalange of digit I absence of interdigital programmed cell death |
