All of the rectrical follicles as well as the pygostyle
were surgically removed.
Centre of the dish, occiput (atlas) and the pygostyle
(region of the caudal vertebrae) were manually marked on a computer screen of each chick on each photograph.
"The structure is called a pygostyle
," Persons said.
Persons found that in some species of oviraptor, the last few vertebrae in the tail were fused into a structure called a pygostyle
. The only animals that have pygostyles
these days are modern birds.
Exotic parts like pygostyle
(chicken's buttocks) and testicles are commonly eaten in East Asia and some parts of South East Asia.
The lower corneous beak length (discriminating sex), showed a positive correlation with the non-discriminant variable of beak marking length (p<0.01), base beak width (p<0.01), metatarsal length (p<0.05) and length from beak to pygostyle
The tail skeleton consists of five or six mobile vertebrae followed by a terminal pygostyle
[ILLUSTRATION FOR FIGURE 1B, 2 OMITTED].