 How its nose looked in life is unknown; the Vespertilionidae generally produce echolocation sounds with the voicebox and not with the nose, and consequently lack the elaborate ultrasound-focusing nose appendages of bats that use the latter technique.To what extent this applied to "Synemporion" is not clear; most of the tribes it may belong to contain a few species with nose or upper jaw appendages.These are rarely as elaborate as those of horseshoe bats (Rhinolophidae), for example, and are sometimes related to sexual selection rather than echolocation; there is no indication that "Synemporion" had marked sexual differences, and altogether its skull shape is not too different from that of e.g.