52 



1 0 mm 



1 



Fig. 34: Glossophaga conimissarisi, a: skull lateral view, b: mandible top view, c: skull dorsal view, 

 d: skull basal view 



premolars triangular iii lateral view, with narrow cusps without styli. Upper molars witli 

 flattened W-pattem, third molar smaller than second, about half the surface of M2. The 

 inside of all tliree molars with distinct convexities. The lower molars are of similar shape 

 showing all five usual cusps, only the last molar slightly smaller. 



G. soricincr. Pomt of lower jaw with ridge on symphysis ("menmm"); pterygoids with 

 lateral widenings ("pterygoid wings", but not the hamuli); presphenoid with distinct ridge; 

 basisphenoid just slightly vaulted. 



Upper mcisivi projecting anteriorly, the imier ones larger than the outer ones, anterior 

 edge of the premaxillare elongate (= in view from above mcisivi well visible); lower 

 incisivi contiguous and imifomi m size. 



G. commissarisi: Upper incisivi do not project forward, the imier ones about the same size 

 as the outer ones, tlie anterior edge of the premaxillaria evenly rounded (incisivi in top 

 view hardly visible); lower mcisivi very small and comb-shaped; presphenoid ridge 

 flattened, pterygoids lacking lateral widenings. 



G. longiwstris: Upper incisivi projecting anteriorly, the ümer ones about the same size as 



the outer ones; lower incisivi large, forming a complete curve between the lower canini; 



symphyseal ridge (mentimi) only weak, pterygoids bulging only to low extent. 



G. leachii: Upper incisivi not projecting forward, the imier ones about the same size as the 



outer ones; anterior edge of the praemaxillare evenly roimded; complete presphenoid ridge 



present. 



G. mexicana: Lower incisivi tiny, separated by distinct gaps, upper incisivi projecting 

 anteriorly, the imier ones distmctly larger than the outer ones, anterior edge of the 

 premaxillaria pointedly elongate. Pterygoid wings lacking, presphenoid ridge subtemiinally 

 flattened. 



Monophyllus (figs. 35-36) 



Skull: rostnmi not quite half the total length of skull, skull appears more stretched than in 

 Glossophaga, similar to Anoura. 



