Fig. (2) Pan troglodytes, dry skull. A, Basicranium, internal aspect, general view (1, anterior cranial fossa; 2, middle cranial fossa; 3, posterior cranial fossa). B, Basicranium, internal aspect, detailed view of the middle and posterior cranial fossae (1, chiasmatic sulcus; 2, anterior clinoid process ; 3, lesser wing of sphenoid ; 4, spheno-parietal eminence ; 5, greater wing of sphenoid ; 6, foramen ovale ; 7, petro-sphenoid suture ; 8, sella turcica ; 9, dorsum sellae ; 10, superior petrosal eminence; the white arrows points towards the superior orbital fissure and the foramen rotundum). C, Basicranium, external (inferior) aspect (1, zygomatic process of temporal; 2, mandibular fossa; 3, articular tubercle; 4, foramen ovale; 5, pterygoid fossa; 6, posterior nasal opening; 7, vomer; 8, postglenoid eminence; 9, carotid canal; 10, foramen magnum). D, basicranium, lateral aspect, left side (1, temporal fossa, 2, zygomatic bone; 3, zygomatic arch; 4, temporal-zygomatic process; 5, mandibular fossa; 6, articular eminence; 7, post-glenoid eminence; 8, lateral pterygoid plate; 9, medial pterygoid plate; 10, posterior wall of maxilla; 11, pterygo-maxillary fissure; 12, pterygoid fossa; the asterisc points towards the foramen ovale). E, mandible, lateral aspect, left side (1, coronoid process; 2, mandibular notch; 3, neck of condyle; 4, head of condyle; 5, angle of mandibular ramus; 6, masseteric fossa (mandibular ramus); 7, mandibular body; 8, mandibular ramus-anterior margin; 9, mandibular ramus-posterior margin). F, mandible, medial aspect,right side (1, coronoid process; 2, mandibular notch; 3, neck of condyle; 4, head of condyle; 5, mandibular foramen; 6, lingular process; 7, mylohyoid groove; 8, medial pterygoid tubercle; 9, stylomandibular tubercle).