Cylindrical Whorl Snail (Truncatellina cylindrica)
Key Details
| Taxonomic Groups: | Invertebrate > mollusc > Mollusc (non-marine) |
| Red List Status: | Endangered (Not Relevant) [EN(nr)] |
| D5 Status: | Included in the baseline Red List Index for England (Wilkins, Wilson & Brown, 2022) |
| Section 41 Status: | (not listed) |
| Taxa Included Synonym: | (none) |
| UKSI Recommended Name: | Truncatellina cylindrica |
| UKSI Recommended Authority: | (A. Férussac, 1807) |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Seddon et al., 2014 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | All of the GB population is in England, though there are historic sites in Scotland. The snail occurs in about 5 widely separated sites in England; the current status at all is unknown. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | A species of dry calcareous grassland. It occurs at very few sites, but its current status is unknown. |
| Question 3: | At a landscape scale, would the species benefit from untargeted habitat management to increase habitat mosaics, structural diversity, or particular successional stages? |
| Response: | No |
| Justification: | Site specific action seems key action. |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 3. National Monitoring Plan agreed and implemented |
| Recovery potential/expectation: | Low - Relict or natural rarity |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | No systematic attempt has been made to assess if the species is currently present at any of the recorded sites. |
Key Actions
Key Action 1
Proposed Action: Survey of previously known sites is needed to assess current status and consider updating the Red List.
Action targets: 3. National Monitoring Plan agreed and implemented
Action type: Status survey/review
Duration: 2 years
Scale of Implementation: ≤ 5 sites
High priority sites: Potton, Beds'; Barnham Cross Common, Thetford, Norfolk; Went Valley Yorks. The Conchological Society hold specific site details.
Comments:
Key Action 2
Proposed Action: Assess management and threats at occupied sites. Not clear why species is so restricted if habitat is short , dry calcareous grassland.
Action targets: 4. Autecology and pressures understood
Action type: Scientific research
Duration: 2 years
Scale of Implementation: ≤ 5 sites
High priority sites: Potton, Beds'; Barnham Cross Common, Thetford, Norfolk; Went Valley Yorks. The Conchological Society hold specific site details.
Comments:
Acknowledgment:
Data used on this website are adapted from Threatened species recovery actions 2025 baseline (JP065): Technical report and spreadsheet user guide (Natural England, 2025). Available here.