Overview

Distribution

Range Description

Bolyeria multocarinata was formerly restricted to Round Island, a 151 ha volcanic islet approximately 0.25 ha NNE of Mauritius.
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Continent: Indian-Ocean
Distribution: Round Island (off the coast of Mauritius)  
Type locality: "Port Jackson"
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© Peter Uetz

Source: The Reptile Database

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Historic Range:
Indian Ocean_Mauritius

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This fossorial Boa was found in the palm groves of mid-altitude top-soil layers on volcanic slopes.

Systems
  • Terrestrial
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
EX
Extinct

Red List Criteria

Version
2.3

Year Assessed
1996
  • Needs updating

Assessor/s
Madagascar Reptile & Amphibian Specialist Group

Reviewer/s

Contributor/s

Justification
Formerly restricted to Round Island, Mauritius, this species has not been recorded since 1975. Soil erosion and a general decline in habitat quality have been blamed for the extinction of this Boa.

History
  • 1994
    Extinct?
    (Groombridge 1994)
  • 1990
    Endangered
    (IUCN 1990)
  • 1988
    Endangered
    (IUCN Conservation Monitoring Centre 1988)
  • 1986
    Endangered
    (IUCN Conservation Monitoring Centre 1986)
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Current Listing Status Summary

Status: Endangered
Date Listed: 03/20/1980
Lead Region: Foreign (Region 10) 
Where Listed: Entire


Population detail:

Population location: Entire
Listing status: E

For most current information and documents related to the conservation status and management of Bolyeria multocarinata , see its USFWS Species Profile

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Population

Population
It was last recorded in 1975.
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Source: IUCN

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Threats

Major Threats
The introduction of rabbits and goats to the island in 1840 resulted in damage to the vegetation, consequently causing soil erosion on the volcanic slopes and deterioration of palm forest habitat. This decline in habitat quality is thought to have been the main reason for the extinction of the Round Island Burrowing Boa.
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Wikipedia

Round Island burrowing boa

The Round Island Burrowing Boa (Bolyeria multocarinata)[2] is an extinct species of snake in the Bolyeriidae family, in the monotypic genus Bolyeria, which was endemic to Mauritius.[3] The species was last seen on Round Island in 1975. No subspecies are currently recognized.[4]

Description[edit]

It reached about 1 m (3 ft 3 in) in length, but preserved specimens have reported total lengths of 54–140 cm. Its colour was described as light brown with blackish spots dorsally and pink marbled with blackish ventrally. It had a pointed snout with a cylindrical body and head. Its general body form suggests that the Round Island Burrowing Boa had fossorial tendencies. This species' closest living relative is the Round Island boa (Casarea dussumieri).

Biology[edit]

The diet of the snake is unknown, but it is thought to have eaten lizards.

Geographic range[edit]

The boa had an extremely small range of only 1.5 square kilometres (0.58 sq mi). Its habitats were hardwood forests and palm savanna. In the past it was found in Mauritius on Gunner's Quoin, Flat Island, Round Island and Ile de la Passe.[1] It survived the longest on Round Island, where it was last recorded.[1][5] The type locality given is "Port Jackson" (in error).[1]

Conservation status[edit]

This species is classified as Extinct (EX) on the IUCN Red List of threatened species (v2.3, 1994).[2] It was already rare by 1949 and was last seen in 1975. Reasons for its extinction are habitat loss caused by soil erosion due to overgrazing by goats and rabbits.[5]

See also[edit]

References[edit]

  1. ^ a b c d e 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 Bolyeria multocarinata at IUCN Red List. Accessed 18 August 2007.
  3. ^ "Bolyeria". Integrated Taxonomic Information System. Retrieved 18 August 2007. 
  4. ^ "Bolyeria multocarinata". Integrated Taxonomic Information System. Retrieved 18 August 2007. 
  5. ^ a b Day, D. 1981. The Doomsday Book of Animals. Ebury Press, London. ISBN 0-670-27987-0
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