This neotropical family is composed of two genera containing eight species, distributed from Brazil to the southern United States. Based on evidence from morphology, chromosome structure, and biochemical features, mormoopids are thought to be closely related to the Phyllostomidae, and until recently it was included in that family as the subfamily Chilonycterinae. The Mormoopidae also appears to be close to the Noctilionidae, and it has been suggested that those three New World families may have shared a common ancestor in the Paleocene.
These small to medium-sized bats lack a well-developed noseleaf, but they do have a small bump on their noses roughly in the position of that structure. Their lips are large, and their lower lips are complexly folded and ornately decorated with plates and flaps of skin. The mouth is distinctively shaped like a funnel when open. Mormoopids also have a fringe of stiff hairs on their muzzles; hence the name "moustache bat." Their eyes are small compared to the eyes of phyllostomids of similar body size. The ears vary in size and shape but always have a tragus (which always has a secondary fold). In some species, the wings attach to the body high along the midline of the back, so that the surface of the back appears naked. Beneath the wings, however, is a normal coating of fur. The fur of most species is brown or reddish brown, but within species some individuals vary considerably in color.
The skulls of mormoopids lack postorbital processes. The premaxillae are complete and fused to each other and to the adjacent maxillae. The palatal branches are well developed and define two palatal formina. The dental formula of members of this family is 2/2, 1/1, 2/3, 3/3 = 34. The molars are dilambdodont.
These bats are strictly insectivorous and generally live near water. They roost gregariously, sometimes in very large colonies, and some species are thought to roost exclusively in caves. They can be found in a wide range of habitat types, from rainforest to arid deserts.
The fossil record of mormoopids is poor, extending only to the Pleistocene.
naked backed bat
peter's ghost faced bat
Family Pteropodidae (Old World fruit-eating bats)
Family Rhinopomatidae (long-tailed or mouse-tailed bats) Family Craseonycteridae (bumblebee bat) Family Emballonuridae (sac-winged or sheath-tailed bats) Family Nycteridae (slit-faced or hollow-faced bats) Family Megadermatidae (false vampire bats) Family Rhinolophidae (horseshoe bats or Old-World leaf-nosed bats) Family Noctilionidae (bull-dog or mastiff bats) Family Mormoopidae (naked-backed bats) Family Phyllostomidae (New World leaf-nosed bats) Family Natalidae (funnel-eared or long legged bats) Family Furipteridae (smoky or thumbless bats) Family Thyropteridae (disc-winged bats) Family Myzopodidae (old world sucker-footed bats) Family Vespertilionidae (evening bats) Family Mystacinidae (New Zealand short-tailed bats) Family Molossidae (free-tailed bats)
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