Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Sorbeoconcha Thiaridae

Scientific Name: Melanoides polymorpha
Species Authority: (Smith, 1877)
Taxonomic Notes: The Melanoides of Lake Malawi are currently under genetic and morphological research and revision. As there is no clear consensus at this writing, we present the taxonomy in Brown 1994, however interested readers should consult papers by T. Kristensen and coauthors, and M. Genner, E. Michel, and co-authors for updates (e.g. Elblom and Kristensen 2003; Genner et al. 2004). As Melanoides are generally clonal, species ID can be problematic. (E. Michel, pers. comm.)

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2010
Date Assessed: 2004-05-30
Needs updating
Assessor(s): Kaunda, E., Magombo, Z., Kahwa, D. & Mailosa, A.
Reviewer(s): Seddon, M.B. & Kristensen, T. (Mollusc Red List Authority)
This species is close to meeting Vulnerable. It has an EOO of less than 20,000km², based on areas of two localities down to 21 m deep. However, the threats are localised and dispersed.
Previously published Red List assessments:
2004 Near Threatened (NT)

Geographic Range [top]

Range Description: This species is endemic to Lake Malawi. This species is known from Mbamba Bay and Msumbi.
Countries occurrence:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Population densities provided in Genner and Michel (2003) for mixed Malawi Melanoides state a max of 1370 individuals/m2. Louda et al. (1983) states at 123 individuals/m2 at Cape Maclear, shallow water
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It is found in soft sediment (silt, sand, fine gravel) in Lake Malawi.
Systems: Freshwater

Threats [top]

Major Threat(s): No information available.

Conservation Actions [top]

Conservation Actions: No information available.

Citation: Kaunda, E., Magombo, Z., Kahwa, D. & Mailosa, A. 2010. Melanoides polymorpha. The IUCN Red List of Threatened Species 2010: e.T44262A10868936. . Downloaded on 07 October 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