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Marstoniopsis armoricana

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA LITTORINIMORPHA HYDROBIIDAE

Scientific Name: Marstoniopsis armoricana
Species Authority: (Paladilhe, 1869)
Taxonomic Notes: The Marstoniopsis species from Western Europe have been synonymised by Falniowski and Wilke (2001) under the name M. scholtzi. This study doesn't include any specimen of Marstoniopsis armoricana. However, it is likely that further studies will show that it is also M. scholtzi.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B2ab(i,iv) ver 3.1
Year Published: 2011
Assessor/s: Prie, V.
Reviewer/s: Seddon, M., Gargominy, O., Cuttelod, A. & Ward, J.
Contributor/s:
Justification:
This species is known only known from a single site where it was recently discovered in 2005. Survey data show that the subpopulation from the type locality seems to have been extirpated. Therefore, the number of subpopulations of this species have decreased. This species is considered as Critically Endangered (CR B2ab(i,iv)).

Geographic Range [top]

Range Description: This species was known from the type locality in the north-west of France (Erdre river, near Nantes). Despite several field surveys (Prie, pers. comm. 2009, Bertrand, pers. comm. 2009), the species has never been found again in this locality. But recently, a population attributable to M. armoricana has been discovered in a channel in Brittany (Ille-et-Vilaine) (Prie, pers. comm. 2009).
Countries:
Native:
France (France (mainland))
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There are few population data available, although the subpopulation at Nantes has been lost.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This species lives in slow-flowing rivers and channels.
Systems: Freshwater

Threats [top]

Major Threat(s): The main cause of the loss of the subpopulation near Nantes is not known.

Conservation Actions [top]

Conservation Actions: More research is needed on the taxonomy, distribution, population size and trends and threats to the species. The number of subpopulations has decreased leaving just one known location. Unless further sites are discovered this should be protected.
Citation: Prie, V. 2011. Marstoniopsis armoricana. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 25 May 2013.
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