BackStaurodon seminulum (R.T. Lowe, 1852)

Staurodon seminulum (R.T. Lowe, 1852)

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Vertiginidae
LC Least Concern
IUCN Red List Status:

Countries of Occurrence:
Portugal - Madeira


Seddon, M.B.

Cameron, R., Groh, K., Cuttelod, A. & Neubert, E.


Facilitators / Compilers/s:

Assessment Rationale:

Although the area of occupancy (AOO = 110 km2) meets the threshold for Endangered B2, the number of localities (>29) suggests that, at present, this species does not meet the other criteria of declining range. Given that many of the sites are close to the coast, and hence on land that may be used for development in the future, the species should be reviewed periodically to assess changes in the status. For the moment, it is considered as Least Concern (LC).

Geographic Range:

This species is endemic to the Madeiran islands; it is found living on the main island of Madeira and recorded as a Quaternary fossil from Porto Santo. It is known from more than 30 sites over the island, and is viewed as most common towards the lower-lying areas near the coast (Seddon 2008).

Portugal - Madeira
Extent of Occurrence (EOO):
Area of Occupancy (AOO):
100 (km2)
Elevation Lower Limit:
Elevation Upper Limit:
Biogeographic Realms:
Endemic Madeira


There is no recent data on population trends, but believed to be stable.

Habitat and Ecology

This species is found undersides of stones and on walls, on rocky slopes and crags amongst grasses and herbs, up to 400 m asl.

Major Threat(s):

It is considered not to be threatened at present due to the availability of habitat and lack of decline in quality of habitat over the range, as it is present on the less developed western and northern coasts. Around urbanizations the species is possibly declining, as habitats are lost due to hotel and residential developments.

Conservation Actions

The species should be reviewed periodically to assess changes in the status.