Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Littorinimorpha Hydrobiidae

Scientific Name: Hemistomia minutissima
Species Authority: Ponder, 1982

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2011-07-22
Assessor(s): Clark, S.
Reviewer(s): Böhm, M. & Collen, B.
Contributor(s): Dyer, E., Soulsby, A.-M., Whitton, F., McGuinness, S., De Silva, R., Milligan, H.T., Kasthala, G., Herdson, R., Thorley, J., McMillan, K. & Collins, A.
Hemistomia minutissima has been assessed as Least Concern as although this species has a tiny distribution, it is within a protected area and is currently unaffected by threat processes. Monitoring of the population is recommended, however, as the restricted and small distribution of this species makes it vulnerable to stochastic events.
Previously published Red List assessments:
1996 Vulnerable (VU)
1994 Vulnerable (V)

Geographic Range [top]

Range Description: This species is only known from the Erskine Valley, on the southern part of Lord Howe Island, Australia (Ponder 1982). The area in which this species is distributed is less than 10 km2.
Countries occurrence:
Australia (Lord Howe Is.)
Estimated area of occupancy (AOO) - km2: 0-10
Number of Locations: 1
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no population information available for this species.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: This species is known from seepages and springs (Department of the Environment, Water, Heritage and the Arts 2009).
Systems: Freshwater

Threats [top]

Major Threat(s): The whole island where this species occurs is a protected area. Therefore it is unlikely that this species is impacted by threat processes. However, its small distribution renders this species more vulnerable to new threat processes or unforeseen stochastic events.

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place for this species, however its entire range is a UNESCO World Heritage Site. Monitoring of the known population is recommended in order to detect any significant declines in population numbers in time.

Citation: Clark, S. 2011. Hemistomia minutissima. The IUCN Red List of Threatened Species 2011: e.T9911A13026317. . Downloaded on 07 October 2015.
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