|Scientific Name:||Belgrandia silviae Rolan & Oliviera, 2009|
Belgrandia gibba Draparnaud, 1805
|Taxonomic Notes:||Synonym: Belgrandia gibba Draparnaud, 1805 [partim]. in Nobre (1930: 206). The species Belgrandia gibba refers to both Belgrandia silviae and Belgrandia lusitanica; see Rolan and Oliviera (2009).|
|Red List Category & Criteria:||Vulnerable D2 ver 3.1|
|Reviewer(s):||Seddon, M.B. & Ramos, M.|
This species is endemic to Portugal, where it is only known from the type locality, a freshwater spring Alcabideque, which is under pressure of exploitation, and hence the species is assessed on a precautionary basis as Vulnerable (VU) D2 pending further investigations in the distribution and threats to the species, as it maybe a candidate for listing at Critically Endangered.
The species is also assessed at a regional level as:
This species is known from a single site in central Portugal, where it is found in the spring of Alcabideque (NE4539), near a small village 3 km east of Condeixa-a- Nova, 10 km to the south of Coimbra (and of Quinta das Lágrimas, type locality of B. lusitanica), province of Beira Litoral, Portugal. This spring is historically related to the old Roman town of Conímbriga, about 2 km to the west; the Romans built an aqueduct in order to carry the water into town. Later the Suevan people destroyed it. Presently, the water of this spring is carried to Ribeira de Bruscos and down the stream to the Ega River, a tributary of the Mondego River on its left margin.
Native:Portugal (Portugal (mainland))
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The population trend is unknown, as this is a recently described species.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:|
This species is known only from a freshwater spring at its type locality in Beira Litoral, Portugal.
|Continuing decline in area, extent and/or quality of habitat:||Unknown|
|Use and Trade:||This species is no used.|
The main threats are uncertain, but the source has been exploited for over 2000 years, however modern trends to concrete and cap freshwater springs are leading to habitat degradation, hence until other sites are known for the species, the locality is considered at risk.
There are no known actions in place for this species, but further investigations in the distribution and threats to the species are urgently needed as it maybe a candidate for listing at Critically Endangered.
|Citation:||Rolán, E. 2011. Belgrandia silviae. The IUCN Red List of Threatened Species 2011: e.T194485A8893507.Downloaded on 22 April 2018.|
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