Scaly breck lichen (Squamarina lentigera)
Key Details
| Taxonomic Groups: | Fungus or lichen > lichen > Lichen |
| Red List Status: | Critically Endangered (Not Relevant) [CR(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: | Squamarina lentigera |
| UKSI Recommended Authority: | (Weber) Poelt |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Woods & Coppins, 2012 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | Critically Endangered. Likely extinct, but recent historic sites few, all in Breckland. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | Likely extinct but awaiting eDNA analysis, and potential to translocate is being investigated. Requires specific conditions/niche. |
| 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: | This species would not benefit from untargeted management |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 6. Recovery solutions trialled |
| Recovery potential/expectation: | Low - Extinction debt |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | Quite probably extinct in England/GB and therefore likely to require translocation efforts using continental material. Possible that material will be found with eDNA analysis although seems a long shot. |
Key Actions
Key Action 1
Proposed Action: Survey Breckland sites where previous recovery attempted, e.g. Elveden estates, NWT, RAF Barnham, including assessing the impact of conservation interventions.
Action targets: 6. Recovery solutions trialled
Action type: Targeted monitoring
Duration: 2 years
Scale of Implementation: ≤ 5 sites
High priority sites: Deadman's Grave, Little Heath Barnham, Weeting Heath, Lakenheath Warren, RAF Barnham
Comments: This management work - apparently targeted at recovery of this species (and others) - has never been surveyed for this (or any) lichen species.
Key Action 2
Proposed Action: Investigate translocation feasibility and develop protocol as required.
Action targets: 5. Remedial action identified
Action type: (Re-)introduction
Duration: >10 years
Scale of Implementation: ≤ 5 sites
High priority sites: Deadman's Grave, Little Heath Barnham, Weeting Heath, Thetford Heath
Comments:
Key Action 3
Proposed Action: Trial techniques for in vitro cultivation of this species.
Action targets: 6. Recovery solutions trialled
Action type: Scientific research
Duration: 6-10 years
Scale of Implementation: National
High priority sites:
Comments: Especially relevant to crustose terricolous lichens too rare to ethically collect from the wild.
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.