47 



lacrimal inflation. Zygomatic arches lacking in all species. Basisphenoid more or less 

 arched, skiill base ahnost at the same level as palate (in German literature: orthocran). 



both in the upper and in the lower jaw two pairs of incisivi present; upper incisors similar 

 to Lionycteris (I1»I2), the lower ones equal m size, with trifid edge, the width of a small 

 gap between 12 and lower canine tooth corresponds to the crown width of the 12. 

 Premolars with three cusps (not monocuspid as in Lionycteris). Anterior premolar 

 separated from canmus by a diastema of its own length. Molar teeth still with functional 

 masticatory surfaces. 



L. thoniasi: Posterior palate edge V-shaped; incisors and anterior edge of the premaxillaria 

 in top view flat and ahnost straight. Basisphenoid pits vaulted. Palate length less than half 

 the total length of skull. Last upper premolar with Ungual cusp, givmg the tooth a T- 

 shaped appearance from top view. Anterior lower premolar with posterior (hooked) cusp. 

 L. mordax (fig. 26): Posterior palate edge U-shaped; incisors and front edge of the 

 premaxillaria pointed anteriorly in top view. Basisphenoid with deeply vaulted pits. Palate 

 approximately half the total skull length. Last upper premolar without lingual cusp, thus 

 appearing narrow from above. Anterior lower premolar without posterior cusp. 



L robusta (fig.27): Posterior margin of the palate U-shaped; anterior edge of the 

 premaxillaria similar to L. thomasi, but a Httle more pointed. Basisphenoid only flatly 

 vauhed. Palate approximately half the total skull length. Last upper premolar witli a well 

 developed Imgual cusp, thus appearmg triangular in top view. Anterior lower premolar 

 with well developed hooked posterior cusp. 



Teeth: dental formula 



- 2 3 1 - - 3 4 5 6 7 

 12-1-234567 



10 mm 



Fig. 26: Lonchophylla mordax, 

 H skull lateral view 



Fig.27: Lonchophylla robusta, 

 skull lateral view 



10 mm 



