IUCN SSC Mid-Atlantic Island Invertebrates Specialist Group


BackNapaeus isletae Groh & Ibanez, 1992

Napaeus isletae Groh & Ibanez, 1992

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Enidae
CR Critically Endangered
IUCN Red List Status:

Countries of Occurrence:
Spain - Canaries


Groh, K. & Alonso, M.R.

Seddon, M.B., Neubert, E. & Cuttelod, A.

Alonso, M.R.

Facilitators / Compilers/s:

Assessment Rationale:

This species is considered as Critically Endangered (CR) B2ab(iii), as it has a restricted range (one location and area of ocucpancy of 4 km2) with a small population which is currently threatened as a result of military activities, as it lies within a military training area. If the military training area designation is removed, future threats will come from urban expansion. Recommended conservation actions include the designation of a 'reserva natural' for the species. 

The criteria for the assessment now reflect the small range and the criteria used in 1996 were incorrect.

Geographic Range:

This species is endemic to the Canary Islands, where it is only found in Gran Canaria, on the peninsula of La Isleta at 3 sites: Monte Faro, Montana del Vigio and Malpais [UTM 28RD5510].

Spain - Canaries
Extent of Occurrence (EOO):
Area of Occupancy (AOO):
4 (km2)
Elevation Lower Limit:
120 (m)
Elevation Upper Limit:
238 (m)
Biogeographic Realms:
Endemic Canaries


Population trend information is not available. There are very few live specimens known (Groh, pers. comm., 2010).

Habitat and Ecology

This ground-dwelling species is found in typical lowland Canary island vegetation.

Major Threat(s):

The major threat comes from habitat destruction as the result of military activities within the military range. In the future there are proposals to remove the military range and use the site for urban expansion.

Conservation Actions

The habitat requires conservation in order to protect the species. Further data would be required for long-term monitoring of the habitat trends. This species is listed as Critically Endangered on the Spanish Red List by Verdu and Galante (2009) and is on the register of Endangered Species for Canary Islands. Actions recommended include the provision of a protected area from Monte del Faro to Montana Colorada.