Anotia
From Dog
Anotia, an autosomal-recessive congenital disease of dogs, is defined as a congenital absence of either one or both ears (pinna).
In dogs, this has been reported in the St. Bernard associated with hereditary polydactyly[1], oral deformities such as bifid tongue and cleft palate as well as extra thoracic vertebrae and ribs.
The cause of this condition is unknown.
Affected dogs have normal hearing despite pups having no or only a vestigial auricular tag and atresic auditory canals. The inner ear appears normal, including the tympanic membrane and the auditory ossicles.
