54 



Fig. 37: Leptonycteris nivalis, a: skull lateral view, b: skull dorsal view, c: basal view 



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



12-1-23456- 



Incisivi comparatively strong, forming a line, distance P to longer than to 'I. Lower 

 incisivi of equal shape "droplet- spa mla shape", the hiner ones larger than the outer ones, 

 medial spearated by a diastema. Lower incisivi present, with low, flat, rounded crown. 

 Well developed canini, the upper ones lacking a cingulum but with two secondary crowns, 

 the one situated at the base of the main shaft being more conspicuous. Lower canini with 

 distmct cingulimi. Premolar teeth long and narrow with tall edges and distinct, but small 

 styli. Seen from above, the anterior lower premolar (P,) is vaulted outwards. Molars still 

 with masticatory surface (W-Pattern) but aheady reduced, Mj with very long narrow base. 



Lichonycteris (fig. 38) 



L. obscura: Skull: bramcase clearly longer than rostrum (comparatively short total length; 

 cf. allometric data). Zygomatic arches very delicate and thus in most cases destroyed 

 durmg preparation; skull base with presphenoid "ridge"; basisphenoid vaulted towards the 

 basioccipitale. 



Lower jaw with distmct mentimi, Proc. coronoideus only slightly higher than articular 

 process. 



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



- - - 1 - 2 3 4 5 6 - 



Upper incisivi equally arranged between the canine teeth, showing gaps between the 

 individual incisivi. Shape similar to Choeroniscus (I^ droplet-spatula-shaped, P dagger- 



a: lateral view, b: frontal view 



10 mm 



