Ungaliophiinae is a subfamily of booid snakes containing two genera, ''

Ungaliophis :''Common names: bromeliad boas, banana boas, neotropical dwarf boas.'' ''Ungaliophis'' is a genus of dwarf boas found from southern Mexico to Colombia. Currently, two species are recognized. Geographic range Found from the Pacific coastal plai ...

'' (two species) and ''

Exiliboa :''Common names: Oaxacan dwarf boa.'' ''Exiliboa'' is a monotypic genus created for the non-venomous dwarf boa species ''Exiliboa placata'', which is endemic to southern Mexico. No subspecies are currently recognized. Description ''E. placata'' ...

'' (one species). They are small constrictors that are found in Central and South America from southern Mexico to Colombia. They eat mostly lizards and frogs and are poorly studied. These snakes were formerly thought to be closely related to two other genera, ''

Tropidophis ''Tropidophis'', common name wood snakes or West Indian wood snakes,Hampton Wildman Parker, Parker HW, Grandison AGC (1977). ''Snakes — a Natural History''. Second Edition. London and Ithaca: British Museum (Natural History) and Cornell Univers ...

'' and '' Trachyboa''; all four genera were united in the family (

Tropidophiidae The Tropidophiidae, common name dwarf boas or thunder snakes, are a family of nonvenomous snakes found from Mexico and the West Indies south to southeastern Brazil. These are small to medium-sized fossorial snakes, some with beautiful and strik ...

) based on the presence of a tracheal lung and the absence of a left lung. However, ''Ungaliophis'' and ''Exiliboa'' are now known to be more closely related to booid snakes, whereas ''Tropidophis'' and ''Trachyboa'' are known to be more closely related to the American red pipesnake ''

Anilius The Aniliidae are a monotypic family created for the monotypic genus ''Anilius'' that contains the single species ''A. scytale''. Common names include American pipe snake and false coral snake. It is found in South America. This snake posses ...

''. Within

Booidea The Booidea, also known as booid snakes, are a superfamily of snakes that contains boas (family Boidae) and other closely related boa-like snakes (but not pythons, which are in a separate superfamily called Pythonoidea). As of 2017, Booidea conta ...

, ''Ungaliophis'' and ''Exiliboa'' are thought to be most closely related to North American ''

Charina ''Charina'' is a genus of nonvenomous boas, commonly known as rubber boas, found in North America. Two species are currently recognized''.'' Distribution and habitat Found in North America from western Canada south through the western United Sta ...

'' and ''

Lichanura ''Lichanura'', the rosy boas, are a genus of snakes in the family Boidae. They are distributed across the southwestern United States and northwestern Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in t ...

'' boas.

References

Boidae {{snake-stub