Species

Back • Heterostoma duplex (Mandahl-Barth, 1950)

Heterostoma duplex (Mandahl-Barth, 1950)

  • Kingdom: Animalia
  • Phylum:
  • Class: Mollusca
  • Order: Gastropoda
  • Family: Hygromiidae
DD Data Deficient
IUCN Red List Status:
  • EX
  • EW
  • CR
  • EN
  • VU
  • NT
  • LC
  • DD
  • NE

Countries of Occurrence:
Portugal - Madeira

Archipelago(s):
Madeira

Download File IUCN Portal

Assessor/s:
Seddon, M.B.

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

Contributor/s:

Facilitators / Compilers/s:

Assessment Rationale:

Bank et al. (2002) list the species as endemic to Porto Santo. However the taxonomic issues discussed in taxonomic notes, led Cameron and Cook (1999) and subsequent unpublished surveys (Cameron, pers. comm., 2010) and Seddon (2008) to conclude that only one species Heterostoma paupercula was present on Porto Santo. No conservation action in place, but requires further research to determine the status as a valid species. It is listed as Data Deficient (DD), but if considered a valid species then it is abundant in the grasslands and open sandy areas with no specific threats, so would become Least Concern.

Geographic Range:

Bank et al. (2002) list the species as endemic to Porto Santo only. However the taxonomic issues discussed in taxonomic notes, led Cameron et al. (1996, 2006) and subsequent unpublished surveys (Cameron, pers. comm., 2010) and Seddon (2008) to conclude that only one species Heterostoma paupercula was present on Porto Santo.

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:

If considered a valid species, then it is abundant in the grasslands and open sandy areas.

Habitat and Ecology

If considered a valid species, then it is abundant in the grasslands and open sandy areas.

Major Threat(s):

If considered a valid species, then it is abundant in the grasslands and open sandy areas with no specific threats.

Conservation Actions

There are no conservation action in place, but it requires further research to determine the status as a valid species, then it is abundant in the grasslands and open sandy areas with no specific threats.