IUCN SSC Mid-Atlantic Island Invertebrates Specialist Group

Species

BackGeomitra watsoni (J.Y. Johnson, 1897)

Geomitra watsoni (J.Y. Johnson, 1897)

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Hygromiidae
DD Data Deficient
IUCN Red List Status:

Countries of Occurrence:
Portugal - Madeira

Archipelago(s):
Madeira

Assessor/s:
Seddon, M.B.

Reviewer/s:
Cameron, R., Groh, K., Cuttelod, A. & Neubert, E.

Contributor/s:

Facilitators / Compilers/s:


Assessment Rationale:

It is unknown whether this overlooked species is still present on offshore islets. The threats and population size and trend are unknown. Therefore this species is considered as Data Deficient (DD).

Geographic Range:

This species is endemic to the Madeiran island. It is found on the Ilheu dos Embarcadores off the Pta da Sao Lourenco, East Madeira (Seddon 2008). Groh (pers. comm., 2010) has recorded two fresh shells from the peninsula but the origin is uncertain. Quaternary fossils from deposits at Canical on the Pta da Sao Lourenco are abundant.

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

Population:

It is unknown whether the species is still present on offshore islets, where it was last recorded in 1896, but Groh recorded two fresh-looking shells from the mainland, although their origin is uncertain, as these could have been transported by gulls.

Habitat and Ecology

The habitat is nknown, but likely to be rocks within grassland and rocky slopes.

Major Threat(s):

The main threats are unknown, as the status on these islets is uncertain.

Conservation Actions

A survey on the offshore islets is required to determine whether this species is still extant.