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Leiostyla Abbreviata, Madeiran Land Snail

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Leiostyla Abbreviata, Madeiran Land Snail The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T11455A3278905 Leiostyla abbreviata, Madeiran Land Snail Assessment by: Seddon, M.B. View on www.iucnredlist.org Citation: Seddon, M.B. 2013. Leiostyla abbreviata. The IUCN Red List of Threatened Species 2013: e.T11455A3278905. http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Copyright: © 2015 International Union for Conservation of Nature and Natural Resources Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written permission from the copyright holder provided the source is fully acknowledged. Reproduction of this publication for resale, reposting or other commercial purposes is prohibited without prior written permission from the copyright holder. For further details see Terms of Use. 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: BirdLife International; Botanic Gardens Conservation International; Conservation International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas A&M University; Wildscreen; and Zoological Society of London. If you see any errors or have any questions or suggestions on what is shown in this document, please provide us with feedback so that we can correct or extend the information provided. THE IUCN RED LIST OF THREATENED SPECIES™ Taxonomy Kingdom Phylum Class Order Family Animalia Mollusca Gastropoda Stylommatophora Lauriidae Taxon Name: Leiostyla abbreviata Lowe, 1852 Common Name(s): • English: Madeiran Land Snail Assessment Information Red List Category & Criteria: Critically Endangered (Possibly Extinct) B2ab(iii) ver 3.1 Year Published: 2013 Date Assessed: August 31, 2010 Justification: This species is endemic to Madeira, where all records in the last 50 years are from the fossil deposits at Canical on the Pta de Sao Lourenco. Wollaston (1878) recorded that it was almost unique as living shells, but gave no locality and no-one has located this species despite surveys. Regnier et al. (2009) noted that this species was extinct, but it is listed as Critically Endangered (Possible Extinct) B2ab(iii), as given the number of deep remote valleys that remain poorly accessible and surveyed, as well as possibility that it occurs in unsurveyed offshore islets around the Ponta da Sao Lourenco. Date last seen: 1870s Previously Published Red List Assessments 1996 – Critically Endangered (CR) 1994 – Extinct? (Ex?) 1990 – Vulnerable (V) 1988 – Vulnerable (V) 1986 – Vulnerable (V) 1983 – Vulnerable (V) Geographic Range Range Description: This species is endemic to Madeira, where all records in the last 50 years are from the fossil deposits at Canical on the Pta de Sao Lourenco (Seddon 2008). Wollaston (1878) recorded that it was almost unique as living shells, but gave no locality and no-one has located this species despite intensive surveys between 1978 and 1999, some specifically for the species in areas believed to have been recorded by © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 1 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Wollaston (1878). Country Occurrence: Possibly extinct: Portugal (Madeira) © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 2 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Distribution Map © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 3 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Population This species has not been recorded living in the last 150 years. Current Population Trend: Unknown Habitat and Ecology (see Appendix for additional information) The habitat of this species is unknown, but probably around crags based on similar looking species. Systems: Terrestrial Use and Trade The species is rarely collected living and hence not known to be exploited. Threats (see Appendix for additional information) The threats are uncertain, as the precise location maybe erroneous, but probably habitat change due to urban development on the south coast. Conservation Actions This species is listed on the EU Habitats and Species Directive Annex II and the Council of Europe Bern Convention Appendix 2. Further survey work on the south coast in remote ravines to determine if the species is still extant. Credits Assessor(s): Seddon, M.B. Reviewer(s): Abreu, C., Cameron, R., Groh, K., Cuttelod, A. & Neubert, E. Contributor(s): Teixeira, D. © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 4 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Bibliography Groombridge, B. (ed.) 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland. IUCN. 1990. IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK. IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: http://www.iucnredlist.org. (Accessed: 16 June 2011). Regnier, C., Fontaine, B. and Bouchet, P. 2009. Not knowing, Not recording, Not Listing: Numerous unrecognized Mollusk Extinctions. Conservation Biology 23: 1214-1221. Seddon, M.B. 2008. An illustrated compendium ofthe landsnails and slugs of the Madeiran archipelago. Studies in Biodiversity and Systematics of Terrestrial Organisms from the National Museum of Wales. Biotir Reports. Wells, S.M., Pyle, R.M. and Collins, N.M. (compilers) 1983. The IUCN Invertebrate Red Data Book. IUCN, Gland, Switzerland and Cambridge, UK. Wollaston, T.V. 1878 Testacea Atlantica or the land and freshwater shells of Azores, aderiras, Salvages, Canaries, Cape Verdes and Saint Helena. London; Reeve. Citation Seddon, M.B. 2013. Leiostyla abbreviata. The IUCN Red List of Threatened Species 2013: e.T11455A3278905. http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Disclaimer To make use of this information, please check the Terms of Use. External Resources For Images and External Links to Additional Information, please see the Red List website. © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 5 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en Appendix Habitats (http://www.iucnredlist.org/technical-documents/classification-schemes) Major Season Suitability Habitat Importance? 0. Root -> 18. Unknown - Suitable Yes Threats (http://www.iucnredlist.org/technical-documents/classification-schemes) Threat Timing Scope Severity Impact Score 1. Residential & commercial development -> 1.1. Ongoing - - - Housing & urban areas Stresses: 1. Ecosystem stresses -> 1.1. Ecosystem conversion 1. Ecosystem stresses -> 1.2. Ecosystem degradation 2. Species Stresses -> 2.1. Species mortality 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 Number of Locations: 1 Habitats and Ecology Continuing decline in area, extent and/or quality of habitat: Unknown © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 6 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T11455A3278905 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: BirdLife International; Botanic Gardens Conservation International; Conservation International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas A&M University; Wildscreen; and Zoological Society of London. THE IUCN RED LIST OF THREATENED SPECIES™ © The IUCN Red List of Threatened Species: Leiostyla abbreviata – published in 2013. 7 http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T11455A3278905.en.
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