A rare fungus has been identified for the first time in the UK at Kingley Vale National Nature Reserve in West Sussex, following a discovery by a member of the public and confirmation through DNA analysis.
Supported by the British Mycological Society, the finding highlights the condition of protected habitats and reinforces the role of National Nature Reserves in maintaining biodiversity across England.
Rare fungus discovered at Sussex nature reserve
The Blue-Based Earthtongue fungus was found within the ancient yew woodland of Kingley Vale National Nature Reserve. The discovery was made by a member of the public exploring the site.
- First UK record of the species
- Located within protected ancient woodland
- Identified by a visiting member of the public
Kingley Vale reserve overview
| Location | West Sussex, South Downs National Park |
| Size | 150 hectares |
| Habitat | Ancient yew woodland and grassland |
| Access | Open to the public year-round |
Scientific confirmation and rarity of the species
The fungus was confirmed as Microglossum cyanobasis following DNA sequencing, with support from the British Mycological Society. Prior to this, the species had only been recorded once in Europe, in northern Spain.
- DNA sequencing used for verification
- Second recorded sighting in Europe
- Previously identified in Spain in 2009
Species identification details
| Scientific name | Microglossum cyanobasis |
| Common name | Blue-Based Earthtongue |
| Identification method | DNA sequencing |
| European records | Spain and United Kingdom |
Characteristics of the Blue-Based Earthtongue fungus
The species is small and difficult to detect, typically measuring between 45 and 55 millimetres in height. It is distinguished by a subtle bluish-green coloration near its base, which differentiates it from similar fungi.
Its tongue-shaped form and delicate structure make it easy to overlook within woodland environments. The colouring contributes to its name, reflecting the blue-toned base observed by specialists.
What the discovery reveals about habitat quality
The presence of the fungus indicates undisturbed, nutrient-poor grasslands and long-established woodland soils. These conditions are associated with stable ecosystems that have remained largely unchanged over time.
Such environments are becoming less common due to land-use change, including fertilisation, drainage and agricultural activity. The finding provides evidence of the ecological condition of the reserve.
Importance of England’s National Nature Reserves
England’s National Nature Reserves form a network of protected sites managed by Natural England and partner organisations. These areas are designed to conserve habitats and support species across a range of ecosystems.
Kingley Vale, located within the South Downs National Park, contains one of the oldest yew forests in Europe, with trees estimated to be at least 500 years old. The reserve remains accessible to the public, with guidance in place to protect its environment.
Stakeholder Comments
Rachel Guy, Kingley Vale National Nature Reserve Manager, Natural England said;
“The discovery of the Earthtongue fungus shows off high-quality habitats and highlights the value of our 224 National Nature Reserves in England. These special places of exceptional ecological value are a credit to everyone who looks after them.
“The presence of the fungus signals undisturbed, nutrient poor grasslands and long-established woodland soils. These environments are becoming increasingly rare due to fertilisation, drainage, ploughing, and land-use change”.
In a Nutshell
The identification of the Blue-Based Earthtongue at Kingley Vale National Nature Reserve provides new evidence of species presence in the UK and supports ongoing conservation efforts.
The finding reflects the condition of protected habitats and the role of monitoring and public engagement in documenting biodiversity across England’s National Nature Reserves.
Sources: Natural England, British Mycological Society.
Prepared by Ivan Alexander Golden, Founder of THX News, an independent news organisation delivering timely insights from global official sources. Combines AI-analysed research with human-edited accuracy and context.
