IUCN SSC Mid-Atlantic Island Invertebrates Specialist Group

Species

BackLeiostyla corneocostata Wollaston, 1878

Leiostyla corneocostata Wollaston, 1878

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Lauriidae
VU Vulnerable
IUCN Red List Status:

Countries of Occurrence:
Portugal - Madeira

Archipelago(s):
Madeira

Assessor/s:
Seddon, M.B.

Reviewer/s:
Cameron, R., Groh, K., Cuttelod, A. & Neubert, E.

Contributor/s:

Facilitators / Compilers/s:


Assessment Rationale:

This species has an area of occupancy of six km2 with some decline in quality of habitat on the main island following development for tourism, and these threats remain the major threats for one of the two location, which lies close to the beach. This suggests that the species merits the status of Vulnerable D2 on the basis of small range and limited habitat. The threats and the distribution remain the same as in 1996, and so the assessment has not changed.

Geographic Range:

This species is endemic to Porto Santo, where it is only known from the south-west part of the mainland (Seddon 2008), a restricted area where it is found close to the coast.

Regions:
Portugal - Madeira
Extent of Occurrence (EOO):
(km2)
Area of Occupancy (AOO):
6 (km2)
Elevation Lower Limit:
(m)
Elevation Upper Limit:
(m)
Biogeographic Realms:
Palearctic
Presence:
Extant
Origin:
Endemic Madeira
Seasonality:
Resident

Population:

The species is currently thought to be stable.

Habitat and Ecology

This species is found amongst vegetation on coastal slopes, especially on small crags and around rocks within the spray zone. It also occurs in fissures in the rocks.

Major Threat(s):

The threats to the species lie in development of the sites where it lives for recreation and tourism (cafes, footpaths, hotels), as most sites lie at the end of the long beach that dominates the south coast of Porto Santo.

Conservation Actions

This species is listed on the EU Habitats and Species Directive Annex II and the Council of Europe Bern Convention Appendix 2. There are no known actions for this species, and the habitats do not lie in a protected area, so it remains vulnerable to development of the site for tourism and infrastructure to support tourism in the region.