''Ia'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

bat Bats are flying mammals of the order Chiroptera (). With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most birds, flying with their very long spread-out ...

in the family

Vespertilionidae Vespertilionidae is a family of microbats, of the order Chiroptera, flying, insect-eating mammals variously described as the common, vesper, or simple nosed bats. The vespertilionid family is the most diverse and widely distributed of bat familie ...

. It belongs to the subfamily

Vespertilioninae The Vespertilioninae are a subfamily of vesper bats from the family Vespertilionidae. Classification Subfamily Vespertilioninae *Tribe Antrozoini **Genus '' Antrozous'' *** Pallid bat, ''Antrozous pallidus'' **Genus '' Bauerus'' *** Van Ge ...

and has been placed in the tribe

Vespertilionini Vespertilionini is a Tribe (biology), tribe of Bat, bats in the family Vespertilionidae. The largest of the tribes in Vespertilioninae, it contains many genera found throughout the Old World and Australasia. Species Species in the tribe includ ...

. In the past, it has also been considered a

synonym A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are a ...

or subgenus of the genera ''

Pipistrellus ''Pipistrellus'' is a genus of bats in the family Vespertilionidae and subfamily Vespertilioninae. The name of the genus is derived from the Italian word , meaning "bat" (from Latin "bird of evening, bat"). The size of the genus has been co ...

'' or ''

Eptesicus ''Eptesicus'' is a genus of bats, commonly called house bats or serotine bats, in the family Vespertilionidae. The genus name is likely derived from the Greek words ''ptetikos'' 'able to fly' or ''petomai'' 'house flier', although this is not cer ...

'', which used to contain many more species than they do now. ''Ia'' comprises a single living species, the great evening bat (''I. io'') of eastern and southeastern

Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...

, and one extinct

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...

species, '' I. lanna'', from the

Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...

epoch in

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

. Another living species, ''I. longimana'', was recognized in the past, but it is no longer considered a valid species distinct from the great evening bat. At two letters, ''Ia'' ties the bat-like dinosaur '' Yi'' and the butterfly '' Ge'' for the shortest possible name of any animal genus under the

International Code of Zoological Nomenclature The International Code of Zoological Nomenclature (ICZN) is a widely accepted Convention (norm), convention in zoology that rules the formal scientific name, scientific naming of organisms treated as animals. It is also informally known as the I ...

.International Commission of Zoological Nomenclature. 1999. International Code of Zoological Nomenclature, Art. 11.8. Online at http://www.iczn.org/iczn/index.jsp

Notes

{{DEFAULTSORT:Ia (Genus) Vesper bats Bat genera Mammal genera with one living species Taxa named by Oldfield Thomas