Overview

Distribution

Range Description

This species is known only from two locations; one subpopulation on the Pacific coast of southern Colima, and Playa Colola on the coast of Michoacan, Mexico. Its known area of occupancy is less than 500 km². It occurs from sea level up to 300 m asl.
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Continent: Middle-America
Distribution: Mexico (Colima, Michoacan)
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Source: The Reptile Database

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
The species is restricted to the dense tropical deciduous forest in lowland Pacific Mexico.

Systems
  • Terrestrial
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2007

Assessor/s
Ponce-Campos, P. & García Aguayo, A.

Reviewer/s
Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)

Contributor/s

Justification
Listed as Data Deficient because it is known only from two widely separated localities. More information is needed on the population status and possible threats to this species before an assessment can be made.
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Population

Population
It is considered to be rare, however the habitat is difficult to survey and populations are very likely to be undetected.

Population Trend
Unknown
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Threats

Major Threats
There are no known threats to this species, and the habitat appears to be mostly unaffected by deforestation.
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Management

Conservation Actions

Conservation Actions
It is not known to occur in any protected areas. More research is needed on population, range, biology and possible threats to this species.
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Wikipedia

Porthidium hespere

Common names: Colima hognosed pitviper.[2]

Porthidium hespere is a venomous pitviper species found in western Mexico. No subspecies are currently recognized.[3]

Contents

Description

Know from only four specimens: two females with locality data and two other specimens without. The former were moderately stout and were 31.5 cm (12⅜ inches) and 57.9 cm (22¾ inches) in total length. The snout is unelevated to only slightly elevated.[2]

Geographic range

Found in western Mexico (Colima). The type locality given is "on a west-facing slope of the foothills ca. 12 airline km NE of Tecomán, Municipio de Ixlahuacán [= Ixtlahuacán], Colima, Mexico, ... at an elevation of approximately 300 m."[1]

Conservation status

This species is classified as Data Deficient (DD) on the IUCN Red List of Threatened Species (v3.1, 2001).[4] Species are listed as such when there is inadequate information to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status. It may be well studied, and its biology well known, but appropriate data on abundance and/or distribution are lacking. Data Deficient is therefore not a category of threat. Listing of taxa in this category indicates that more information is required and acknowledges the possibility that future research will show that threatened classification is appropriate. It is important to make positive use of whatever data are available. In many cases great care should be exercised in choosing between DD and a threatened status. If the range of a taxon is suspected to be relatively circumscribed, and a considerable period of time has elapsed since the last record of the taxon, threatened status may well be justified. The population trend is unknown. Year assessed: 2007.[5]

See also

References

  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. ^ "Porthidium hespere". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=585989. Retrieved 15 September 2007.
  4. ^ Porthidium hespere at the IUCN Red List. Accessed 15 September 2007.
  5. ^ 2001 Categories & Criteria (version 3.1) at the IUCN Red List. Accessed 15 September 2007.

Further reading

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