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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Lepidosauromorpha
Superordo: Lepidosauria
Ordo: Squamata
Subordo: Serpentes
Infraordo: Alethinophidia
Superfamilia: Anilioidea

Familia: Tropidophiidae
Genus: Exiliboa
Species: Exiliboa placata

Exiliboa Bogert, 1968
Vernacular names
English: Oaxacan Dwarf Boa

Exiliboa is a monotypic genus[2] created for the non-venomous dwarf boa species, Exiliboa placata, which is endemic to southern Mexico. No subspecies are currently recognized.[3]


Exiliboa placata is shiny black in color.[4]

Exiliboa placata is fossorial.[4]
Geographic range

Exiliboa placata is found in the Mexican state of Oaxaca in the Sierra de Juárez and Sierra Mixe near Totontepec. The type locality given is "near latitude 17° 37' N. and longitude 96° 25' W., at an elevation of approximately 2300 meters [7,546 feet] on the headwaters of the Río Valle Nacional on the northern slopes of the Sierra de Juárez, in the State of Oaxaca, Mexico".[1]
Conservation status

The species E. placata is classified as Vulnerable (VU) on the IUCN Red List of Threatened Species with the following criteria: B1ab(iii) (v3.1, 2001).[5] A species is listed as such when the best available evidence indicates that the geographic range, in the form of extent of occurrence, is estimated to be less than 20,000 km2 (7,772 sq mi), estimates indicate it to be severely fragmented or known to exist at no more than 10 locations, and a continuing decline has been observed, inferred or projected in the area, extent and/or quality of habitat. It is therefore considered to be facing a high risk of extinction in the wild. The population trend is down. Assessed in 2007.[6]

McDiarmid RW, Campbell JA, Touré T (1999). Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1. Washington, District of Columbia: Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
"Exiliboa ". Integrated Taxonomic Information System. Retrieved 14 September 2007.
"Exiliboa placata ". Integrated Taxonomic Information System. Retrieved 14 September 2007.
Mehrtens JM (1987). Living Snakes of the World in Color. New York: Sterling Publishers. 480 pp. ISBN 0-8069-6460-X.
Exiliboa placata at the IUCN Red List. Accessed 14 September 2007.

2001 Categories & Criteria (version 3.1) at the IUCN Red List. Accessed 14 September 2007.

External links

Exiliboa placata at the Reptile Database. Accessed 14 September 2007.

Further reading

Bogert CM (1968). "A New Genus and Species of Dwarf Boa from Southern Mexico". American Museum Novitates (2354): 1-38. (Exiliboa, new genus, p. 2; Exiliboa placata, new species, p. 6).


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