OMIA:000656-9913 : Molars, impacted in Bos taurus (taurine cattle)

Categories: Skeleton phene (incl. short stature & teeth)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal recessive

Considered a defect: yes

Key variant known: no

Species-specific name: "parrot-mouth"

Clinical features: Heizer and Hervey (1937): "Calves showing the defect died within the first week after parturition. ... The principal abnormality observed in the dead calves was the impaction of the premolar teeth in the mandible which was greatly reduced in length and width giving a "parrot-mouth" appearance."

Breed: Dairy Shorthorn (Cattle) (VBO_0000186).
Breeds in which the phene has been documented. (If a likely causal variant has been documented for the phene, see the variant table breeds in which the variant has been reported).

Cite this entry

Nicholas, F. W., Tammen, I., & Sydney Informatics Hub. (2022). OMIA:000656-9913: Online Mendelian Inheritance in Animals (OMIA) [dataset].


1937 Heizer, E.E., Hervey, M.C. :
Impacted molars - A new lethal in cattle Journal of Heredity 28:123-128, 1937.

Edit History

  • Created by Frank Nicholas on 18 Mar 2011
  • Changed by Imke Tammen2 on 29 Oct 2022