Fig. 5.

Superficial muscles of the shoulder region of Choloepus didactylus (A) and Bradypus variegatus (B). Ventral aspect. 1: M. pectoralis superficialis anterior; 2: M. pectoralis superficialis posterior; 3: M. pectoralis profundus medius; 4: M. pectoralis profundus posterior; 5: M. latissimus dorsi; 6: M. dorso-epitrochlearis; 7: M. deltoideus; 8: M. sternomastoideus; 9: M. cleidomastoideus; 10: M. deltoideus pars clavicularis; 11: M. deltoideus pars acromialis; 12: M. biceps brachii anterior belly; 13: M. biceps brachii caudal belly; 14: Common tendon of 2, 11, 12; 15: M. coracobrachialis; 16: M. serratus ventralis; 17: M. pectoralis superficialis; 18: M. triceps brachii caput mediale.