Changes

[[Image:Sheep skull.jpg|thumb|right|150px|Sheep skull - Copyright nabrown RVC]]

[[Image:Sheep skull.jpg|thumb|right|150px|Sheep skull - Copyright nabrown RVC]]

===Ruminant===

===Ruminant===

*Skull is short and wide

In ruminants the skull is short and wide with a '''[[Horn - Anatomy & Physiology|cornual]]''' process on frontal bone. The nuchal crest is reduced to a '''nuchal line''', although there is a prominent '''temporal line'''. Ruminants have an elevated orbital ring which is complete but have no facial crest. There are prominent '''tympanic bullae''' and a '''nasoincisive notch''' present. The wings of the basisphenoid bones form the '''oval foramen'''. Ruminants have no '''foramen lacernum'''. The petrosal and tympanic parts of the temporal bone are fused to the squamous part. The zygomatic process articulates with the frontal process of the zygomatic bone.

 

*[[Horn - Anatomy & Physiology|Cornual]] process on frontal bone

 

*Nuchal crest reduced to nuchal line

 

*Prominent temporal line

 

*Elevated orbital ring which is complete

 

*No facial crest

 

*Prominent tympanic bullae

 

*Nasoincisive notch present

 

*Wings of the basisphenoid bones form the oval foramen  

 

===Porcine===

===Porcine===

*Thick nucal crest

*Thick nucal crest