Lymnaea natalensis 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Hygrophila Lymnaeidae

Scientific Name: Lymnaea natalensis
Species Authority: Krauss, 1848
Regional Assessments:
Limnaea arabica (Brown & Wright, 1980)
Limnaea caillaudi Bourguignat, 1883
Limnaea gravieri Bourguignat, 1885
Limnaea orophila Morelet, 1864
Limnaea perrieri Bourguignat, 1881
Limnaea raffrayi Bourguignat, 1883
Limnaeus natalensis exsertus von Martens, 1866
Lymnaea vatonnei Bourguignat, 1868
Radix natalensis Krauss, 1848
Taxonomic Notes: There is some debate over whether this species should be placed in the genus Radix. As Bargues et al. (2001) in their genetic study of the Lymnaeidae state: 'The present knowledge on the genetics of lymnaeids and on their parasite-host inter-relationships is far from being sufficient. The family is immersed in a systematic-taxonomic confusion.' This means that some authors consider the names between brackets as distinct genera and others as subgenera. The assessor followed Brown (1994) and Appleton (1996) who use Lymnaea as the generic name but considers that the taxonomic issue has not yet been satisfactorily resolved.

For the Arabian Peninsula, the identification of large Lymnaea (or Radix) species with Lymnaea natalensis remains with some doubts. Given the enormous progress in research on Palaearctic Lymnaeidae (which results in acceptance of many additional species to the present concept), it is very likely that the Arabian L. natalensis has to be split into species in their own rights. For example, the widespread form of L. natalensis in Oman could turn out to be a separate species, which then has to be named Lymnaea arabica Smith 1894 (Neubert pers. comm. 2012).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2009-05-02
Assessor(s): Appleton, C., Ghamizi, M., Jørgensen, A., Kristensen, T.K., Stensgaard, A.-S. & Van Damme, D.
Reviewer(s): Seddon, M., Van Damme, D., Graf, D., Appleton, C., Bennett, L. & García, N.
This species has a widespread distribution with no major widespread threats identified. It appears to be tolerant to changes affecting regional wetlands, and is assessed as Least Concern.

Geographic Range [top]

Range Description: Lymnaea natalensis is widespread in tropical Africa, but it is rare in the northeast coastal area and found in Madagascar. It is known throughout the Congo in Central Africa, widespread in Eastern Western, Northeast and Southern Africa, apart from ephemeral systems in Namibia and Botswana, and the western Cape Province of South Africa. In northern Africa, its distribution ranges from the Nile Delta and throughout, and is very common. In the Maghreb it is only found in three localities in Algeria, although it was previously known from many prehistoric locations (8-10,000 years ago) in this country. Outside of Africa, the species is present in the Arabian Peninsula in Yemen (Al-Safadi 1990), Oman (Smythe and Gallagher 1977, Brown and Wright 1980, Brown and Gallagher 1985) and Saudi Arabia (Neubert 1998).
Countries occurrence:
Algeria; Angola (Angola, Angola); Benin; Botswana; Burkina Faso; Burundi; Cameroon; Central African Republic; Chad; Congo; Congo, The Democratic Republic of the; Côte d'Ivoire; Djibouti; Egypt; Equatorial Guinea (Equatorial Guinea (mainland)); Eritrea; Ethiopia; Gabon; Gambia; Ghana; Guinea; Guinea-Bissau; Kenya; Liberia; Madagascar; Malawi; Mali; Mozambique; Namibia; Niger; Nigeria; Oman; Saudi Arabia; Somalia; South Africa; South Sudan; Sudan; Swaziland; Tanzania, United Republic of; Uganda; Yemen (North Yemen, South Yemen); Zambia; Zimbabwe
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: No information available regarding population sizes, but the species is widespread and common.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It is found in permanent water bodies.
Systems: Freshwater

Use and Trade [top]

Use and Trade: No information is available.

Threats [top]

Major Threat(s): No significant major threats are considered to be affecting this species at global level. In southern Africa, it may be being displaced by the invasive Lymnaea columella.

Conservation Actions [top]

Conservation Actions: No specific conservation measures are in place for this species. Taxonomic research is recommended.

Citation: Appleton, C., Ghamizi, M., Jørgensen, A., Kristensen, T.K., Stensgaard, A.-S. & Van Damme, D. 2012. Lymnaea natalensis. The IUCN Red List of Threatened Species 2012: e.T165761A16846338. . Downloaded on 31 May 2016.
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