Pachnodus velutinus 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Cerastidae

Scientific Name: Pachnodus velutinus
Species Authority: (Pfeiffer, 1841)

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2009
Date Assessed: 2006-01-11
Assessor(s): Gerlach, J.
Reviewer(s): Miller, R.M., Pollock, C.M. & Seddon, M.B.
Range contraction in this species has been recorded since 1972, following range expansion by Pachnodus niger which eventually led to hybridization. Hybrids exhibited a selective advantage in being tolerant of dry conditions; P. velutinus required constant humidity levels in excess of 90%. In 1994, no true P. velutinus could be located and since that date its range has been occupied exclusively by P. niger x velutinus hybrids.
Previously published Red List assessments:
2000 Extinct (EX)

Geographic Range [top]

Range Description: Endemic to the Seychelles, this extinct snail was found only on Mahé island.
Countries occurrence:
Regionally extinct:
Seychelles (Seychelles (main island group))
Range Map: Click here to open the map viewer and explore range.

Habitat and Ecology [top]

Habitat and Ecology: This snail once inhabited high forests, requiring constant humidity levels in excess of 90%. By the early 1990s, it was restricted to the dampest area of moss forests, and by 1994 it had become extinct.
Systems: Terrestrial

Threats [top]

Major Threat(s): Being vulnerable to dessication, this species was historically threatened by habitat degradation and climatic changes. Hybridization with Pachnodus niger led to the extinction of this species in 1994.

Conservation Actions [top]

Conservation Actions: This snail was historically present in the Morne Seychellois National Park.

Citation: Gerlach, J. 2009. Pachnodus velutinus. The IUCN Red List of Threatened Species 2009: e.T40091A10304648. . Downloaded on 25 November 2015.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided