Species

BackLeiostyla simulator (Pilsbry, 1923)

Leiostyla simulator (Pilsbry, 1923)

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Lauriidae
CR Critically Endangered
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:

This species was not listed in 1983 (Wells et al. 1983). Its status was reviewed in 1990 and it was thought to be threatened (Wells and Chatfield 1992). The first review placed the species as possibly Extinct, and in 1996 the species was placed as Critically Endangered (CR), following the category and criteria changes (version 2.3), as there was insufficient survey data to show it was extinct. However as noted above it has rarely been recorded in spite of all of the surveys undertaken between 1970 and 2005. It is also possible that the species is a rare form of L. spinctostoma, as the shells of this species are very variable. Seddon (2008) suggested that Data Deficient should be the assessments, as this species is very poorly known and is only known from little shell material in Museum collections. However, this species is currently considered as Critically Endangered, Possibly Extinct.

Geographic Range:

This species is very poorly known from little shell material in Museum collections. There is no map for this species (Seddon 2008), as it was described from "Madeira".

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:

This species is very poorly known, there is no population trend data.

Habitat and Ecology

This species is very poorly known, the habitats are uncertain, but likely to be rock crags and on rock ledges amongst leaf-litter.

Major Threat(s):

This species is very poorly known, so the threats are uncertain.

Conservation Actions

This species is very poorly known, so there are no conservation actions in place, although it requires surveys based on the Museum collection material to establish status and then field surveys to relocate the range and hence establish populations and conservation status. This species was not listed in 1983 (Wells et al. 1983), and reviewed again in 1990 and thought to be threatened (Wells and Chatfield 1992).