Species

BackOxychilus minor Riedel, 1964

Oxychilus minor Riedel, 1964

Snail

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

Countries of Occurrence:
Portugal - Azores

Archipelago(s):
Azores

Reviewer/s:
Groh, K. & Seddon, M.B.

Contributor/s:

Facilitators / Compilers/s:


Assessment Rationale:

The present species is endemic to the Azores Archipelago (Portugal) in the Atlantic Ocean. It is only known from Pico and Faial (Frias Martin 2008, Atlas data) from 11 to 20 locations. The species is found in habitats with non-native Aegopinella nitidula on Pico and similarly to other species of its genus (A.M. Frias Martins pers. comm. 2016) it could be negatively affected by this or other non-native species. It is not though to be affected by any other threats. As yet there is insufficient data to assess the impact of Aegopinella nitidula on the population, and hence the species is assessed as Least Concern (LC). If a monitoring programme shows that the populations are in decline, then it should be assessed as threatened or Near Threatened.

Geographic Range:

This species is endemic to the Islands of Azores (Portugal) in the Atlantic Ocean, where it is only known from Pico and Faial (Frias Martins 2008, Atlas data). On Pico it is recorded from nine to ten locations and on Faial from two locations (Frias Martins 2008, Atlas data

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

Population:

There are insufficient data to estimate the total population size of this species.

Current Population Trend: Unknown 

Habitat and Ecology

The species is found in forested habitats, where it is typically living in leaf litter at the base of large trees, under and upon logs and by large rocks.

Systems: Terrestrial

Major Threat(s):

The species is found in habitats with the non-native snail Aegopinella nitidula on Pico, and similarly to other species of its genus (A.M. Frias Martins pers. comm. 2016) it could be negatively affected by this or other non-native species. On Faial, Aegopinella nitidula is present on the western side of the island and not in the habitats where the present species occurs.

Conservation Actions

There are no conservation actions known for this species. A monitoring programme is required to evaluate whether any populations are in decline as a result of the non-native species on Pico and Faial.