Hemicycla Diegoi

The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T194082A101389223 Scope: Global Language: English

Hemicycla diegoi

Assessment by: Groh, K.

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Citation: Groh, K. 2017. Hemicycla diegoi. The IUCN Red List of Threatened Species 2017: e.T194082A101389223. http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T194082A101389223.en

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THE IUCN RED LIST OF THREATENED SPECIES™ Taxonomy

Kingdom Phylum Class Order Family

Animalia Mollusca Gastropoda Stylommatophora Helicidae

Taxon Name: Hemicycla diegoi Neiber, R. Vega-Luz, Ro. Vega-Luz & Koenemann, 2011

Taxonomic Source(s): Neiber, M.T., Vega-Luz, Ri., Vega-Luz, Ro. and Koenemann, S. 2011. Hemicycla (Adiverticula) diegoi, a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840. Zootaxa 2757: 29-46.

Taxonomic Notes: This is a recently described species. Assessment Information

Red List Category & Criteria: Near Threatened ver 3.1

Year Published: 2017

Date Assessed: November 19, 2016

Justification: This species is endemic to the island of Tenerife in Spain. It has an extremely restricted area of occupancy (AOO; 4 km2) and is known from only one location. However, there are no known threats to the species. It is therefore considered as Near Threatened (NT), almost meeting criterion B as, due to its extremely restricted AOO, it is prone to any stochastic events, such as fires. Further research is needed upon the distribution, population size and trend of the species.

Previously Published Red List Assessments 2011 – Near Threatened (NT) http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T194082A8876491.en

Geographic Range

Range Description: This species is endemic to the Teno Peninsula in the far northwest of the Island of Tenerife (Neiber et al. 2011) in the Canary Islands, Spain.

Country Occurrence: Native: Spain (Canary Is.)

© The IUCN Red List of Threatened Species: Hemicycla diegoi – published in 2017. 2 http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T194082A101389223.en Population There is no information available on the population size or trend of this species. It is present in some abundance at the site (K. Groh pers. comm. 2016). Current Population Trend: Unknown

Habitat and Ecology (see Appendix for additional information) This species is found in dry temperate shrub vegetation (Piso Basal).

Systems: Terrestrial

Use and Trade This species is not used. Threats There are no major threats to this species. There is no ongoing habitat disturbance. It is present on an extremely steep slope and hence it is not likely to be affected by urbanization.

Conservation Actions (see Appendix for additional information) There is no conservation action in place for this species. Further research is needed upon the distribution, population size and trend of the species. Credits

Assessor(s): Groh, K.

Reviewer(s): Seddon, M.B., Teixeira, D., Cameron, R., Neubert, E. & Allen, D.J.

Contributor(s): Neubert, E.

© The IUCN Red List of Threatened Species: Hemicycla diegoi – published in 2017. 3 http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T194082A101389223.en Bibliography IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-3. Available at: www.iucnredlist.org. (Accessed: 7 December 2017).

Neiber, M.T., Vega-Luz, Ri., Vega-Luz, Ro. and Koenemann, S. 2011. Hemicycla (Adiverticula) diegoi, a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840. Zootaxa 2757: 29-46.

Citation Groh, K. 2017. Hemicycla diegoi. The IUCN Red List of Threatened Species 2017: e.T194082A101389223. http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T194082A101389223.en

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External Resources For Images and External Links to Additional Information, please see the Red List website.

Habitats (http://www.iucnredlist.org/technical-documents/classification-schemes)

Major Season Suitability Habitat Importance? 3. Shrubland -> 3.5. Shrubland - Subtropical/Tropical Dry Resident Suitable Yes

Conservation Actions in Place (http://www.iucnredlist.org/technical-documents/classification-schemes)

Conservation Actions in Place In-Place Research, Monitoring and Planning

Action Recovery plan: Unknown

Systematic monitoring scheme: Unknown

In-Place Land/Water Protection and Management

Conservation sites identified: Unknown

Research Needed (http://www.iucnredlist.org/technical-documents/classification-schemes)

Research Needed 1. Research -> 1.2. Population size, distribution & trends

Additional Data Fields

Distribution Estimated area of occupancy (AOO) (km²): 4

Continuing decline in area of occupancy (AOO): Unknown

Extreme fluctuations in area of occupancy (AOO): Unknown

Estimated extent of occurrence (EOO) (km²): 4

Continuing decline in extent of occurrence (EOO): Unknown

Extreme fluctuations in extent of occurrence (EOO): Unknown

Number of Locations: 1

Lower elevation limit (m): 100

Upper elevation limit (m): 300

© The IUCN Red List of Threatened Species: Hemicycla diegoi – published in 2017. 5 http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T194082A101389223.en Population Continuing decline of mature individuals: Unknown

Extreme fluctuations: Unknown

Population severely fragmented: No

No. of subpopulations: 1

All individuals in one subpopulation: Yes

Habitats and Ecology Generation Length (years): 1-5

© The IUCN Red List of Threatened Species: Hemicycla diegoi – published in 2017. 6 http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T194082A101389223.en The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T194082A101389223 Scope: Global Language: English

The IUCN Red List Partnership

The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership.

The IUCN Red List Partners are: Arizona State University; BirdLife International; Botanic Gardens Conservation International; Conservation International; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas A&M University; and Zoological Society of London.

THE IUCN RED LIST OF THREATENED SPECIES™