Alzoniella lucensis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Littorinimorpha Hydrobiidae

Scientific Name: Alzoniella lucensis (Rolan, 1992)
Belgrandiella cf. cantabrica (Boeters & Rolán, 1988)
Belgrandiella lucensis (Rolán 1993)
Taxonomic Notes:

A population of A. lucensis found in the province of  La Coruna might result from artificial introduction, located in the distribution area of A.rolani.  It differs from other populations with absence of penial pigmentation and rounded bursa copulatrix.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2009-05-31
Assessor(s): Arconada, B.
Reviewer(s): Ramos, M., Rolán, E., Galante, E., Seddon, M.B. & Nichols, C.
Contributor(s): Ramos, M.
Alzoniella lucensis is known from a wide area relative to other species of spring-snail and in different habitats, and hence although many of the habitats are vulnerable to exploitation, the species could be considered as Least Concern. However Verdú & Galante (2009) listed the species as Near Threatened, reflecting that the species has a more restricted range and lives in habitats that are exploited for water (Arconada & Ramos pers. comm. 2010).  Given the large number of sites and the area over which the species exists, it could be considered Near Threatened if a high proportion of the sites are currently impacted by threats.

EU27:  Least Concern (possibly Near Threatened)
Europe:  Least Concern (possibly Near Threatened)
Mediterranean: Least Concern (possibly Near Threatened)
Global Assessment:  Least Concern.

Geographic Range [top]

Range Description:

This species is endemic to Spain, and is mainly found in the western part of the provinces of Lugo and Orense and extends towards the western part of Asturias. A few localities were found in the provinces of La Coruña and León.

  • Bembibre (4km N), Province A Coruña (UTM grid square NH26)
  • Ourol (2km SW), Province Lugo (UTM grid square PH19), torrent
  • O Courel, from Quiroga to Fisteus shorley after turn-off to Fisteus, Province Lugo (UTM grid square PH40), brook
  • N. Saa, 2.8km before turn-off to Tricastela, Province Lugo (UTM grid square PH44)
  • O Courel, ferriros de Abajo, Province Lugo (UTM grid square PH51), brooks
  • O Courel, between Folgoso and Seoane, Province Lugo (UTM grid square PH52, wet rocks near river Lor
  • O Courel, a little SW. Seoame, Province Lugo (UTM grid square 52), wet rock
  • Between Quiroga and Besarredonda, Province Lugo (UTM grid square PH51), wet rocks and running water
  • Entrance to A Devesae, at turn off to Noceda (2.9km), Province Lugo (UTM grid square PJ52), rocks
  • San Martin de la Ribeira, Province Lugo (UTM grid sqaure PH55), La Viarega spring
  • N. Seoana 4km before turn off to Cereixido and Cuiñas, Province Lugo (UTM grid square PH56), torrent
  • E. Exit of Castillo de Doiras towards Ancares, Province Lugo (Utm grid square PH63), spring
  • N. Of Navia de Suarna at turn off to Vilarquende, Province Lugo (Grid square Ph66), wet rocks
  • 2km behind Navia de Suarna on Roa road, Fonte so Cruceiro, Province Lugo (UTM grid square PH66), in springs nearby
  • Between San Martín de Oscos and Navia, before crossing River Lixou, Province Asturias (UTM grid square PH79), wet rocks
  • Between San Martin de Oscos and Navia, 1.4km from Illao, Province Asturias (UTM grid square PH79), wet rock
  • S. of  Pola de Allande, Province Asturias (UTM grid square PH99), water running down rock
  • Penzol, Province Asturias (UTM grid square PJ61), spring with washing place
  • E. Entrance to Añides, Province Asturias (UTM grid square PJ61), spring
  • Between Boal and Vegadei, 600m from the turn off to Meredo and Molejón, Province Asturias (UTM grid square PJ61), wet rocks
  • Between Monasterio de Hermo and Narcea springs, Province Asturias (UTM grid square QH06), wet rocks
  • Between Cangas de Narcea and Puerto fe Leitariegos, 1km from turn off to Palacio and Naviego, Province Asturias (UTM grid square QH07)
  • S. Exit of Cangas de Narcea at the beginning of highway to Cobos, Province Asturias (UTM grid square QH08), springs
  • Between Pola fe Allende and Canga de Narcea, 4km from Puente del Infierno, Province Asturias (UTM grid square QH08), wet rocks
  • E. of Soto de Luiña, 1km before Castañedas, Province Asturias (UTM grid square QJ12), waterfall
  • Between Monforte and Ourense, 300, aat road to Frean, near Peares dam, Province Ourense (UTM grid square PH00), wet walls
Countries occurrence:
Spain (Spain (mainland))
Additional data:
Estimated area of occupancy (AOO) - km2:104
Number of Locations:26
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No data is available on status of populations.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is found in a variety of freshwater habitats including small torrents, brooks, wet rocks near rivers, wet rocks with running water, waterfalls and wet walls.

Use and Trade [top]

Use and Trade: This species is not utilised.

Threats [top]

Major Threat(s): The major threats to these spring-snail species are changes to the hydrological regime, water quality and  vegetation in the streams.  Possible sources of threats include agricultural developments adjacent to the streams, as well as canalisation of streams to abstract water, with drastic reduction of remaining water flow (Arconada et al. 2009). Other threats include pollution from agricultural sources.

Conservation Actions [top]

Conservation Actions: There are no conservation actions for this species.

Citation: Arconada, B. 2011. Alzoniella lucensis. The IUCN Red List of Threatened Species 2011: e.T156091A4892657. . Downloaded on 17 October 2017.
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