66 



Table 9: Proportion of mean height of braincase (MWx) / mean coronoid length (MWy) 





X / y 



SD 





X / y 



SD 



Brachyphylla 



1.57 





Glossophaga 





2.14 



0.19 



Phyllostomiis 



1.59 





Phyllonycteris 





2.14 



0.11 



Platalina 



1.76 





Musonycteris 





2.16 





Lonchophylla 



1.87 



0.19 



Erophylla 





2.17 



0.13 



Carol! ia 



1.87 



0.18 



MonophyUus 





2.17 



0.13 



Leptonycteris 



1.99 



0.11 



Lichoiiycteris 





2.20 



0.19 



Hylonycteris 



2.12 





Choeronycteris 





2.27 



0.17 



Lionycteris 



2.13 



0.07 



Choeroniscus 





2.80 



0.28 



An our a 



2.13 



0.25 











Mandible length to coronoid height: as a reliable measure for rostrum length the length of 

 the mandible may be quoted. Relating mandibular length (MWx) to coronoid height 

 (Mwy), the quotients appear in the following distribution: tab. 10. 



Table 10: Proportion of mean mandibula length (MWx) / mean coronoid heigth (MWy) 





X / y 



SD 





X / y 



SD 



Carollia 



2.77 



0.14 



Platalina 



4.22 





Phyllonycteris 



3.35 



0.20 



Hylonycteris 



4.24 





Lionycteris 



3.40 



0.13 



Anoiira 



4.25 



0.39 



Erophylla 



3.52 



0.18 



Scleronycteris 



4.70 





Glossophaga 



3.62 



0.20 



Choeronycteris 



5.26 



0.32 



Lonchophylla 



3.93 



0.19 



Choeroniscus 



5.49 



0.28 



Leptonycteris 



4.05 



0.27 



Musonycteris 



6.01 





MonophyUus 



4.08 



0.24 









Tliese quotients clearly reflect different levels of specialization witliin the group but do 

 not necessarily allow statements on the construction principles they are based on. 

 Although size differences witliin nectar feeding bats are moderate, size-dependent shifts in 

 proportion camiot be definitely mied out. After all, forearm length between Lichonycteris 

 obscura (30.3 nmi) and Leptonycteris nivalis (58.2 mm) differs by approximately 100 

 percent. 



So, the allometric relations between the measures mentioned within the subfamily and the 

 neighbouring phyllostomid genera Carollia (Carolliinae) and Phyllostomus (Phyllosto- 

 minae) wih be referred to. 



Ahometrics 



Allometric comparison of individual genera 



hi this study, a large portion of the species to be examined was represented by very few 

 individuals. Some of them show an intraspecific variability proving larger than 

 interspecific distances. Furtliemiore, measured differences sometimes are within the error 

 range pre-determined by the methods of measuring. Tlius, a comprehensive comparison of 

 intraspecific ahometries for the entire group may be impossible, and any examination will 



