At first this bat was considered a phyllostomid. Two characteristics supported this opinion: the nose leaf (not clearly seen in the photo) and the absence of a loose tail extending beyond the uropatagium (membrane which connects hind limbs and enclose totally or partially the tail).
Olga Vaccaro sent the photos to the PCMA (Program of Bat Conservation of Argentina) and Rubén Barquez and César Bracamonte, specialists in the subject gave their own opinion. For them this is an Eumops
Rubén Barquez thinks he can not see any genus or species in the area with this look. What is not so clear to him is that the bat is flying during the day, except the photo gives that impression. César Bracamonte agrees in that this is an Eumops for the prominent ears and the robust body and adds that it may be flying during the day because it may have been driven away from its refuge, something common... Regarding the tail Rubén comments that "when manouvering in flight the tail can be folded and it is not seen in a photo." For César "The tail is folded that is why it does not extend beyond conspicously."