Cobalt Crust - Terana coerulea

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Alternative names
Pulcherricium caeruleum
Description

A resupinate to slightly reflexed crust, variable in colour from bright blue to greyish- or blackish- blue.    It has a white fringed margin 

Identification difficulty
Recording advice

Photograph on the host; note species

Habitat

On deciduous wood, typically Ash

When to see it

All year round.

UK Status

Infrequent or occasional in England and Wales and very rarely recorded in Scotland and Ireland.

VC55 Status

Infrequent in Leicestershire and Rutland.

  • katesfungi
    Leighfield by River Chater
    18 February 2025
  • katesfungi
    Leighfield by River Chater
    18 February 2025
  • AnnFinn
    Market Bosworth Country Park
    25 November 2019
  • mttnx
    Great Merrible Wood
    25 January 2025
  • martindgrimes
    Barnsdale
    18 January 2017
  • mttnx
    Great Merrible Wood
    25 January 2025
  • mttnx
    Great Merrible Wood
    22 December 2025

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species data profile ?

Species profile

Common names
Cobalt Crust
Species group:
fungus
Kingdom:
Fungi
Order:
Polyporales
Family:
Phanerochaetaceae
Records on NatureSpot:
6
First record:
18/01/2017 (Grimes, Martin)
Last record:
22/12/2025 (N, Matt)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records

  • mttnx
    Great Merrible Wood
    22 December 2025