Alzoniella delmastroi


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Alzoniella delmastroi
Species Authority: Bodon & Cianfanelli, 2004

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2010-03-19
Assessor(s): Cianfanelli, S. & Bodon, M.
Reviewer(s): Seddon, M.B., von Proschwitz, T., Aldridge, D. & Cuttelod, A.
Alzoniella delmastroi is endemic from Italy, with only 3 known sites in a small range of less than 200 km2. The main threats include habitat destruction (for water capture), pollution from roads, as well as groundwater feeding the springs relating to pollution of the water from pesticides, fertilizers, sewage and over-abstraction of the source. A future threat lies in the colonisation by a non-native spring-snail, which could compete with the native species. This species is therefore considered as Endangered (EN) B1ab(iii)+2ab(iii).

Geographic Range [top]

Range Description: This species is endemic to Italy, where it is only known from the Graie Alps, NW of Turin. The range is very restricted, and the living specimens have only been found in three springs (Bodon and Cianfanelli 2004).
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population status of this species is unknown. About 200 shells and 40 specimens have been collected in the 3 sites, as published in the paper (Bodon and Cianfanelli 2004).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The species is only found in freshwater in karst systems
Systems: Freshwater

Threats [top]

Major Threat(s): The species is rare, with a restricted range and given that it occurs in springs, the species could be affected by habitat destruction (improving the water capture points),  pollution and possibly, introduction of alien molluscs (like Potamopyrgus antipodanum). Most of the sites occur outside of protected areas, and as such the springs could be captured to feed aqueducts. In other cases, the spring is near the road, so it could be sufficient to have some roadworks with a manhole to alter the habitat.

Conservation Actions [top]

Conservation Actions: There are no known conservation actions in place for this species. Habitat should be monitor and communication actions, to raise awareness of the local communities, are needed.

Citation: Cianfanelli, S. & Bodon, M. 2010. Alzoniella delmastroi. The IUCN Red List of Threatened Species. Version 2014.2. <>. Downloaded on 02 September 2014.
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