Craspedopoma trochoideum 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Architaenioglossa Craspedopomatidae

Scientific Name: Craspedopoma trochoideum Lowe, 1860
Craspedoma trochoideum Lowe, 1860 [orth. error]

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2010-09-30
Assessor(s): Seddon, M.
Reviewer(s): Cameron, R., Groh, K. & Cuttelod, A.

Seddon (2008) assessed this species as Least Concern (version 3.1) noting that species meets the range criteria for Vulnerable B1, but the presence in suitable habitats in at least 10 different valleys on the island in habitats that are protected, suggests that a lower category is merited for the species.  Hence given the presence in these valleys throughout northern Madeira and the low level of threats, the species is given a confirmed assessment as Least Concern (LC). 

Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to Madeira. It is only known living on the northern side of the island where it occurs from coast to intermediate elevations. Wollaston (1878) noted that this was the rarest of the Craspedopoma species on Madeira.  However recent surveys show that it is present in many more sites and that two other species C. monziana and C. lyonnetianum are both rarer species.
Countries occurrence:
Portugal (Madeira)
Additional data:
Number of Locations:14
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is present in suitable habitats in more than 10 different valleys on the island in areas that are protected,which suggests that it is reasonably widespread.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is found in damp shaded wooded areas amongst leaf litter and mosses, and on the underside of stones.

Use and Trade [top]

Use and Trade: This species is not used.

Threats [top]

Major Threat(s): The inland sites are fairly intact, with only the coastal habitats show signs of habitat degradation.  This is due to urbanisation, clearance and disturbance along the roadsides.

Conservation Actions [top]

Conservation Actions: The species is found in protected areas, suggesting there are some measures in place for its conservation.

Citation: Seddon, M. 2011. Craspedopoma trochoideum. The IUCN Red List of Threatened Species 2011: e.T5485A11215635. . Downloaded on 23 May 2018.
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