Porthidium nasutum

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Porthidium nasutum
Porthidium nasutum (La Selva Biological Station) 2.jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Viperidae
Genus: Porthidium
Species: P. nasutum
Binomial name
Porthidium nasutum
(Bocourt, 1868)
Porthidium nasutum distribution.png
  • Bothrops nasutus Bocourt, 1868
  • Porthidium nasutum Cope, 1871
  • Bothriopsis proboscideus
    Cope, 1875
  • Th[anatos]. sutus
    Posada Arango, 1889
  • Th[anatophis]. sutus
    – Posada Arango, 1889
  • Lachesis brachystoma
    Boulenger, 1896
  • Bothrops nasuta Amaral, 1929
  • Trimeresurus nasutus
    Dunn & Bailey, 1939
  • Bothrops nasutus
    J.A. Peters & Orejas-Miranda, 1970
  • Bothriechis nasutus Savage, 1980
  • Porthidium nasutum
    H.M. Smith & R.P. Smith, 1976[1]
Common names: rainforest hognosed pitviper,[2] horned hog-nosed viper.[3]

Porthidium nasutum is a venomous pitviper species found in Mexico, Central America and northern South America. No subspecies are currently recognized.[4]


P. nasutum at Corcovado National Park in Costa Rica
P. nasutum at the La Selva Biological Station in Costa Rica

Adults are usually less than 40 centimetres (16 in) in total length, and rarely more than 60 centimetres (24 in). Females are considerably larger than males. Moderately stout and terrestrial.[2]

Geographic range[edit]

Found in southern Mexico southward through Central America to western Colombia and northwestern Ecuador in South America. Inhabits the Atlantic lowlands from Mexico (Tabasco and Chiapas) through Belize, Guatemala, Honduras, Nicaragua and Costa Rica to eastern Panama and northwestern Colombia. In the Pacific lowlands, it occurs in southwestern Costa Rica, central and eastern Panama, continuing on to northwestern Ecuador. It is found in mesic lowland broadleaf or rainforest from sea level to elevation of about 900 metres (3,000 ft). The type locality given is "Pansos [Panzós], sur les bords du Polochic [Alta Verapaz] (Guatémala)."[1]

Conservation status[edit]

This species is classified as Least Concern (LC) on the IUCN Red List of Threatened Species (v3.1, 2001).[5] Species are listed as such due to their wide distribution, presumed large population, or because it is unlikely to be declining fast enough to qualify for listing in a more threatened category. The population trend is stable. Year assessed: 2007.[6]

See also[edit]


  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. ^ a b Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. 2 volumes. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. ISBN 0-8014-4141-2.
  3. ^ Brown JH. 1973. Toxicology and Pharmacology of Venoms from Poisonous Snakes. Springfield, Illinois: Charles C. Thomas. 184 pp. LCCCN 73-229. ISBN 0-398-02808-7.
  4. ^ "Porthidium nasutum". Integrated Taxonomic Information System. Retrieved 15 September 2007. 
  5. ^ Porthidium nasutum at the IUCN Red List. Accessed 15 September 2007.
  6. ^ 2001 Categories & Criteria (version 3.1) at the IUCN Red List. Accessed 15 September 2007.

Further reading[edit]

  • Bocourt, M.F. 1868. Descriptions de quelques Crotaliens nouveaux appartenant au genre Bothrops, recueillis dans le Guatémala. Annales des sciences naturelles, Series 5, 10: 201-202. ("Bothrops nasutus n. sp.", p. 202.)

External links[edit]