Pachymelania byronensis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Sorbeoconcha Thiaridae

Scientific Name: Pachymelania byronensis (Wood, 1828)
Strombus byronensis Wood, 1828

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2006-08-06
Needs updating
Assessor(s): Kristensen, T.K. & Stensgaard, A-S.
Reviewer(s): Seddon, M. & McIvor, A.
This is a widespread species with no known major widespread threats however it is thought to be locally threatened in the Niger delta.

Geographic Range [top]

Range Description:This species is found from Côte d'Ivoire to Sierra Leone, Cameroon and Guinea (see Bandel and Kowalke 1999 and references therein).
Countries occurrence:
Benin; Cameroon; Côte d'Ivoire; Ghana; Guinea; Liberia; Nigeria; Sierra Leone; Togo
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No information available.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is found in brackish waters on the west African coast. It is adapted to low salinity.

Threats [top]

Major Threat(s): Human induced habitat degradation is a likely threat. Petroleum drilling could also represent a threat (Ekpo and Uzegbu 2004).

Conservation Actions [top]

Conservation Actions: None known. It would be valuable with more information about taxonomy, population sizes and distribution, ecology, biology and threats.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
5. Wetlands (inland) -> 5.16. Wetlands (inland) - Permanent Saline, Brackish or Alkaline Marshes/Pools

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
1. Residential & commercial development -> 1.1. Housing & urban areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

3. Energy production & mining -> 3.1. Oil & gas drilling
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.2. Industrial & military effluents -> 9.2.1. Oil spills
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats

Bibliography [top]

Bandel, K. and Kowalke, T. 1999. Gastropod fauna of the Cameroonian coasts. Helgoland Marine Research 53: 129-140.

Brown, D.S. 1994. Freshwater Snails of Africa and their Medical Importance. Taylor & Francis, London.

Brown, D.S. and Kristensen, T.K. 1993. A field guide to African freshwater snails. Danish Bilharziasis Laboratory, Charlottenlund, Denmark.

Ekpo, M.A. and Uzgebu, M.L. 2004. The effect of the petroleum drilling mud additive (chromelignosulphonate) on the microbiology and survival of periwinkle (Pachymelania spp. and Tympanotonus sp.). World Journal of Microbiology and Biotechnology 20(6): 559-562.

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: (Accessed: 2 September 2010).

Same-Ekobo, A., Wibaux-Charlois, M., Kristensen, T.K., Frandsen, F., Deniau, M. and Ripert, C.H. 1984. Distribution geographique et ecologie des mollusques dulcaquicoles du Cameroun. Institute de recherches medicales et d'etudes des plantes medicinales, Yaonde, Cameroun.

Citation: Kristensen, T.K. & Stensgaard, A-S. 2010. Pachymelania byronensis. The IUCN Red List of Threatened Species 2010: e.T175140A7112397. . Downloaded on 25 May 2018.
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