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Zospeum biscaiense 

Scope: Europe
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Eupulmonata Ellobiidae

Scientific Name: Zospeum biscaiense Gómez & Prieto, 1983
Taxonomic Source(s): Bank, R.A. 2017. Fauna Europeae Project: Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th., 2017. Fauna Europea Project: http://www.nmbe.ch/sites/default/files/uploads/PDF_Upload/fauna_europaea_2017_03_16.pdf. Hoogezand.

Assessment Information [top]

Red List Category & Criteria: Near Threatened (Regional assessment) ver 3.1
Year Published: 2017
Date Assessed: 2016-11-15
Assessor(s): Slapnik, R. & Gómez Moliner, B.J.
Reviewer(s): Allen, D.J. & Neubert, E.
Contributor(s): von Proschwitz, T., Reischütz, A. & Fehér, Z.
Facilitator/Compiler(s): von Proschwitz, T.
Justification:

This species is endemic to northeastern Spain, where it is known from at least 15 caves. The current or potential threats at the known localities are uncertain and require research. The species is assessed as Near Threatened (NT B1a+2a) on the basis of the restricted area of occupancy and extent of occurrence.

Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is known from 15-16 caves in the Sierra de Aramot and the Montes de Triano, Bizkaia, northeastern Spain (Gómez and Prieto 1983, Prieto et al. 2011, C.E. Prieto unpublished data 2017).
Countries occurrence:
Native:
Spain (Spain (mainland))
Additional data:
Estimated area of occupancy (AOO) - km2:36Continuing decline in area of occupancy (AOO):No
Estimated extent of occurrence (EOO) - km2:140
Continuing decline in extent of occurrence (EOO):No
Number of Locations:15-16
Lower elevation limit (metres):500
Upper elevation limit (metres):600
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Due to the small size and subterranean occurrence of this species, nothing is known about the current population trend.
Current Population Trend:Unknown
Additional data:
Continuing decline of mature individuals:Unknown
Extreme fluctuations:UnknownPopulation severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:

This species is found in the interior parts of the cave (Prieto et al. 2011). Members of this genus are found on moist cave walls (Jochum et al. 2012).

Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Unknown

Use and Trade [top]

Use and Trade: The species is not utilized.

Threats [top]

Major Threat(s):

The type locality cave is in a mountain area, and whilst it is known by local people, it is only rarely visited by speleologists (C.E. Prieto pers. comm. 2016). Prieto et al. (2011) suggest that conifer afforestation around the type locality cave may result in changes to the interior conditions of the cave, but this requires further research and monitoring, and nothing is known of threats at the other caves where it is recorded.

Conservation Actions [top]

Conservation Actions: The species has been assessed as Vulnerable (VU) in Spain (Verdú et al. 2011). Research has shown that this species has a much wider contribution and is not restricted to a single cave, the type locality. Monitoring of all cave environments is recommended.

Citation: Slapnik, R. & Gómez Moliner, B.J. 2017. Zospeum biscaiense. The IUCN Red List of Threatened Species 2017: e.T23258A85575968. . Downloaded on 20 February 2018.
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