IUCN SSC Mid-Atlantic Island Invertebrates Specialist Group


BackOxychilus volutella L. Pfeiffer, 1856

Oxychilus volutella L. Pfeiffer, 1856


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

Countries of Occurrence:
Portugal - Azores


Seddon, M.B.

Cameron, R., Teixeira, D., Groh, K. & Allen, D.J.


Facilitators / Compilers/s:

Assessment Rationale:

This species is endemic to the Azores Islands (Portugal), where it is only known from a single island, San Miguel (Cameron et al. 2007, Frias Martins 2008). The species has a restricted range, however it is currently not facing any threats, although there is habitat disturbance. The species is assessed as Least Concern (LC). 

Geographic Range:

This species is endemic to the Azores Archipelago (Portugal), where it is only recorded from San Miguel Island (A.M. Frias Martins pers. comm. 2016). The species is known from five widely scattered locations at a range of altitudes on the island (R.A.D. Cameron pers. comm. 2016). Previous records (e.g. Frias Martins 2008) from other islands in the Archipelago are incorrect. Backhuys (1975) also shows the species to be present on more islands, but this is based on information from the 19th century.

Portugal - Azores
Extent of Occurrence (EOO):
800-1000 (km2)
Area of Occupancy (AOO):
Elevation Lower Limit:
0 (m)
Elevation Upper Limit:
1000 (m)
Biogeographic Realms:
Endemic Azores


There is no information on the population trend, however the species is present at scattered locations over the island.

Current Population Trend: Unknown 

Habitat and Ecology

This is a forest species mainly found on the forest floor. It is tolerant of some disturbance.

Systems: Terrestrial 

Major Threat(s):

The species is currently not facing any threats although there is habitat disturbance. 

Conservation Actions

No conservation actions are known for this species. Some sites lie within a protected area. Monitoring of the species distribution and population trend are recommended.