Species

BackCaseolus baixoensis Walden, 1983

Caseolus baixoensis Walden, 1983

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

Countries of Occurrence:
Portugal - Madeira

Archipelago(s):
Madeira

Assessor/s:
Seddon, M.B.

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

Contributor/s:
Abreu, C., Cameron, R., Groh, K. & Teixeira, D.

Facilitators / Compilers/s:


Assessment Rationale:

The species meets the range restriction criteria for Vulnerable B, one confirmed location and possible impact due to recreational use. Seddon (2008) suggested Data Deficient due to taxonomic uncertainties, however due to the precautionary principle a suggested listing of Vulnerable (VU) D2 is proposed, for the single known site. Recommended conservation actions include management of the protected areas for maintenance of this species and monitoring of the protected areas to ensure no loss of further habitat and subpopulations as well as more taxonomic research on the status of the species.

Geographic Range:

This species is endemic to Madeiran islands; it is only known from Porto Santo, where its complete range is uncertain, although there are reported records the South-East hills behind the harbour (Seddon 2008).

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

Population:

There are few specimens known for this species and hence the status is uncertain.

Habitat and Ecology

The single known site is grassland with rocky areas.

Major Threat(s):

The main threat is changing land management, for example overgrazing by livestock, and possible impact from recreational activities (creation of footpaths along coastal ridge).

Conservation Actions

Recommended conservation actions include management of the protected areas for maintenance of this species and monitoring of the protected areas to ensure no loss of further habitat and subpopulations as well as more taxonomic research on the status of the species.