IUCN SSC Mid-Atlantic Island Invertebrates Specialist Group

Species

BackAmphorella cimensis Walden, 1983

Amphorella cimensis Walden, 1983

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Ferussaciidae
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. & Böhm, M.

Contributor/s:
Abreu, C., Cameron, R., Colville, B. & Norris, A.

Facilitators / Compilers/s:


Assessment Rationale:

This species is endemic to the Madeiran Islands (Portugal), where it is restricted to Porto Santo and adjacent islets of Ilhéu de Baixo and Ilhéu de Cima. On coastal areas it is found at four separate localities on the main island of Porto Santo, but its presence on Baixo and Cima is uncertain and as such it may have between 4 and 10 locations. The main threat is habitat degradation and loss, as some of these habitats are threatened by development for tourism purposes, especially around coastal bays. The island and its land snail fauna are recognized by the regional government as requiring conservation actions and currently work is ongoing to produce management plans. It is currently listed as Vulnerable, based on number of locations and level of threats, where tourism development is potential future threat (D2), but past and continuing declines in the quality of habitat qualifies the species under the B criterion.

Geographic Range:

This species is endemic to the Madeiran Islands (Portugal), where it is restricted to Porto Santo and adjacent islets of Ilhéu de Baixo and Ilhéu de Cima. Wollaston (1878) commented that this “form” as he recorded it, was common on Baixo and Cima. Based on a small area of occupancy of 16 km2, this species has found at four separate localities, all within coastal habitats on the main island of Porto Santo, but its presence on Baixo and Cima is uncertain, hence it may be present at 4 to 10 locations.

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

Population:

There are no population abundance data for this species, although there are regular records over the last 25 years (Seddon 2012, pers. comm.)

Habitat and Ecology

The species is typically found in contact with bare earth underneath stones and logs.

Major Threat(s):

The main threat is habitat degradation and loss. Some of these habitats are potentially threatened by development for tourism purposes, with development around coastal bays. Whereas other sites lay within fields where changes in agricultural practice, including intensification of production, use of fertilisers and pesticides, as well as increased frequency of fires, all disrupt the habitats.

Conservation Actions

The island and its land snail fauna are recognized by the regional government as requiring conservation actions and currently work is ongoing to produce management plans.