polymelia

Polymelia - an extra arm or leg.

Polymelia is a condition in which an embryo starts as conjoined twins in the womb.

Frogs in the USA sometimes are affected by polymelia when attacked in the tadpole stage by the Ribeiroia parasite.

Polymelia in a broiler chicken., Anderson WI, Langheinrich KA, McCaskey PC.: "A polymelus monster was observed in a 7-week-old slaughterhouse chicken."

These include all forms of limbs anomalies, such as amelia, ectrodactyly, phocomelia, polymelia, polydactyly, syndactyly, polysyndactyly, oligodactyly, brachydactyly, achondroplasia, congenital aplasia or hypoplasia, amniotic band syndrome, and cleidocranial dysostosis.