It's just one of the many birth defects involving supernumerary body parts, which also include fingers (Polydactyly), limbs (polymelia
), and yes, even penises (polyphallia).
A hatch-year Swainson's hawk (Buteo swainsoni) recovered from Modoc County, California, USA, on August 12, 2012, had malformations of the rear limbs consisting of bilateral polymelia
Polymelia is also a congenital skeletal deformity with presence of supernumerary limb in any area of body surface (Barua et al., 2014).
Multiple reports on occurrence of polymelia with one or two supernumerary fore and hind limbs in crossbred calves have been reported [Rahman et al.
THE four-legged chicken Polymelia
is the medical term for a person or animal born with more than the average number of limbs.
Polymelia also known as Heterotopic polymelia is a birth defect involving limbs (a type of dysmelia), in which the affected individual /animal has more than usual number of limbs attached to one or various parts of the body (Super numerary ectopic limb) (Rafiqul Islam et.
The present paper documents a cattle with pygomelia, a kind of heterotopic polymelia.
Based on the observations the condition was diagnosed as a kind of heteropic polymelia called as Pygomelia (Fig.
Polymelia also known as developmental duplication, in symmetrical twins of cattle displays the presence of six or eight legs according to the degree of their attachment (Singh et al., 1989).