53 



Teeth: dental formula - 2 3 1 - - 3 4 5 6 7 



12-1-234567 



Teeth essentially like Glossophaga, the incisivi, however, remaining much smaller. Tlie 

 upper ones with distinct gaps between each other as well as to the canmi and different in 

 form: the inner ones with flat edge, the outer ones pointed. Tlie lower incisivi are very 

 small, with flat, rounded crowns, arranged in two pairs which are separated by a broad 

 median gap. 



10 mm 



Fig. 35: Monophylliis rediuani, a: skull lateral view, b: skull basal view, c: skull dorsal view, d: 

 incisivi, e: upper tooth row 



M. redmani (fig. 35): The upper premolars are separated from each other by a conspicous 

 gap, occupying more than half the crown length of the anterior upper premolar. 



M plethodon (fig. 36): Upper premolars separated from each other just by a small diastema 

 (<l/2 the length of the anterior upper premolars). 



Fig. 36: Monophylliis plethodon, upper tooth row 



Leptonycteris (fig. 3 7) 



L nivalis: Skull long and flat, rostnmi almost half of total length, braincase wider than 

 high. Skull base well vaulted (basisphenoid), presphenoid ridge ending bulging; Pterygoid 

 processes flat, shghtly club-shaped (in contrast to Choeroniscus), Fossa mandibularis 

 "shadowed" by Processus glenoidalis - i.e. comparatively solid mandibular joint. 

 Mandibula long and narrow, Processus coronoideus only slightly higher than Proc. 

 articularis. Curvature of the Ramus mandibularis inserts yet caudal of the Proc. 

 coronoideus. 



