The greater cornua (or greater horns) of the hyoid bone project backward from the lateral borders of the body; they are flattened from above downward and diminish in size from before backward; each ends in a tubercle to which is fixed the lateral hyothyroid ligament. The upper surface is rough close to its lateral border, for muscular attachments: the largest of these are the origins of the hyoglossus and Constrictor pharyngis medius which extend along the whole length of the cornu; the digastric muscle and stylohyoid muscle have small insertions in front of these near the junction of the body with the cornu. To the medial border the hyothyroid membrane is attached, while the anterior half of the lateral border gives insertion to the thyrohyoid. The greater cornua derive from the 3rd pharyngeal arches[Wikipedia:Greater_cornu].

hyoid bone upper horn

greater horn of the hyoid

epibranchial of gill arch I

greater cornua

hyoid bone long horn

epibranchial

hyoid bone greater cornu

posterior horn of hyoid

second horn of hyoid

hyoid bone superior horn

epibranchial of pharyngeal arch III

uberon

UBERON:0003997

In humans, the greater cornua are the larger, more lateral projections from the left and right borders of the body of hyoid bone. They are in contrast to the lesser cornua, which also occur in pairs but are comparatively smaller and conical in shape. The greater cornua are derived from the third pharyngeal arches.