With regard to the other muscles of the human shoulder, subscapularis, supraspinatus, infraspinatus, teres minor and teres major, they are also present in quadrupeds, but in a form more elongated, as the scapula has its dimensions more extended from below upwards-that is, from the glenoid cavity towards the superior or spinal border.
"Artistic Anatomy of Animals"
Édouard Cuyer
The subscapularis does not offer any interest from the point of view of external form, for it is completely covered by the scapula.
"Artistic Anatomy of Animals"
Édouard Cuyer