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Any of various widely distributed insect-eating bats of the family Vespertilionidae, characterized by a long tail.

[From New Latin Vespertiliōnidae, family name, from Vespertiliō, Vespertiliōn-, type genus, from Latin vespertiliō, bat, from vesper, evening; see wes-pero- in Indo-European roots.]

ves′per·til′i·nid adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vespertilionid - a variety of carnivorous batvespertilionid - a variety of carnivorous bat  
carnivorous bat, microbat - typically having large ears and feeding primarily on insects; worldwide in distribution
family Vespertilionidae, Vespertilionidae - the majority of common bats of temperate regions of the world
frosted bat, Vespertilio murinus - common Eurasian bat with white-tipped hairs in its coat
Lasiurus borealis, red bat - North American bat of a brick or rusty red color with hairs tipped with white
little brown bat, little brown myotis, Myotis leucifugus - the small common North American bat; widely distributed
cave myotis, Myotis velifer - small bat of southwest United States that lives in caves etc.
big brown bat, Eptesicus fuscus - rather large North American brown bat; widely distributed
Eptesicus serotinus, European brown bat, serotine - common brown bat of Europe
Antrozous pallidus, cave bat, pallid bat - drab yellowish big-eared bat that lives in caves
pipistrel, pipistrelle, Pipistrellus pipistrellus - small European brown bat
eastern pipistrel, Pipistrellus subflavus - one of the smallest bats of eastern North America
SPipistrellus hesperus, western pipistrel - of western North America
Euderma maculata, jackass bat, spotted bat - a large bat of the southwestern United States having spots and enormous ears
long-eared bat - any of various Old or New World bats having very long ears
References in periodicals archive ?
In some vespertilionids (such as Eptesicus, Perimyotis, Myotis, Lasionycteris), the ulna has a small or absent olecranon process, is unfused at the semilunar notch but fused slightly more distally along the shaft beneath or just distal to the semilunar notch, and contributes its own separate, small articular facet to the semilunar notch.
This bat parasite has been previously reported from other vespertilionids including the little brown myotis (Myotis lucifugus) in New Mexico (Cain and Studier i974) and Minnesota (Macy 1931), big brown bat (Eptesicus fuscus) in Minnesota (Macy 1931), gray myotis (Myotis grisescens) in Kansas (Ubelaker 1966), western pipistrelle (Pipistrellus hesperus) in Nevada, and eastern pipistrelle (Pipistrellus [=Perimyotis] subflavus) in Nebraska (Nickel and Hansen 1967).
Records were documented for nine vespertilionids of six genera (Myotis, Lasionycteris, Pipistrellus, Eptesicus, Lasiurus, Nycticeius), and one molossid (Tadarida).
On the eastern side, in contrast, the northern site was dominated by vespertilionids and phyllostomids; the proportion of vespertilionids also diminished southward.
We compared the genetic diversity of CoVs isolated from rhinolophids and vespertilionids and the corresponding diversity among bat taxa by using the index of nucleotide diversity 0t) described by Nei (28) in Arlequin version 3.