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  \section{Introduction}  \textit{Carollia} is a genus of fruit-eating bats widely widespread  distributed and highly abundant in the Neotropic. These species are crucial for different ecological processes, like seed dispersal and restoration of tropical forests, consequently. forests.  Due to their ecological plasticity, species of this genus  are often found on in  disturbed and transformed ecosystems that are under high levels of pressure. It is also common two find two or even three sympatric species all along South America.  Currently, up to  eight species are accepted to be part of in  this genus, genus (\textit{C. benkeithi}, \textit{C. brevicauda}, \textit{C. castanea}, \textit{C. manu}, \textit{C. monohernandezi}, \textit{C. perspicillata}, \textit{C. subrufa}, \textit{C. sowelli}),  and it has been discussed the taxonomic identity of another one (\textit{C. colombiana}). The taxonomy of these species is unclear based on morphological and morphometric data , and some of them have been considered to be complex of species yet unsolved.   A broad variety of studies have focused in this genus, offering detailed information regarding their evolutionary history, behaviour, functional morphology and ecology. Also,  other two. studies have tried to shed light on its taxonomy, studying the morphological boundaries between species, as well as the effect of both biotic and environmental traits on its morphological plasticity. Despite the lack of concise agreement, the general consensus sets size variations as the main source of morphological differentiation between species. Hence, this feature has been widely used as a taxonomic clue to identify some of these species. However, published research using molecular approaches indicate that the morphological description and discrimination of these species is inaccurate, and misleads researchers from solving the identity of unknown cryptic species.