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Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Boidae
Subfamily: Ungaliophiinae
Genus: Exiliboa
Bogert, 1968
Species: E. placata
Binomial name
Exiliboa placata
Bogert, 1968
  • Exiliboa - Bogert, 1968
  • Exiloboa - Myers, 1974

  • Exiliboa placata - Bogert, 1968[1]
Common names: Oaxacan dwarf boa.

Exiliboa is a monotypic genus[2] created for the non-venomous dwarf boa species, E. placata, found in Mexico. No subspecies are currently recognized.[3]


Fossorial and shiny black in color.[4]

Geographic range[edit]

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 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[edit]

This species 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, 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]


  1. ^ a b McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
  2. ^ "Exiliboa". Integrated Taxonomic Information System. Retrieved 14 September 2007. 
  3. ^ "Exiliboa placata". Integrated Taxonomic Information System. Retrieved 14 September 2007. 
  4. ^ Mehrtens JM. 1987. Living Snakes of the World in Color. New York: Sterling Publishers. 480 pp. ISBN 0-8069-6460-X.
  5. ^ Exiliboa placata at the IUCN Red List. Accessed 14 September 2007.
  6. ^ 2001 Categories & Criteria (version 3.1) at the IUCN Red List. Accessed 14 September 2007.

External links[edit]