Microthyrium ciliatum
The fruit bodies are dark brown to blackish, circular, one cell thick, with central ostioles for spore release. Under the microscope they appear as a series of radiating cells, evenly coloured. They rest on the surface of their host with hyphae holding them in place.
| Holly Speckle Trochila ilicina |
Phacidium lauri | Phomopsis crustosa | Microthyrium ciliatum |
|---|---|---|---|
 |
 |
 |
There are some nice comparison images of species 1, 2 and 4 here. |
| Small (<1mm) speckles on the upper side of the leaf only. | Pustules (c.1.5mm) on upper and lower surfaces of the leaf. | Immersed black conidiomata (0.5mm) on brown spots surrounded by a narrow black line. | Tiny black speckles (<0.5mm) on both sides of the leaf. |
Found growing individually and gregariously on both surfaces of dead holly leaves.
Whenever dead Holly leaves can be found.
David Nicholls
Ratby garden
03 February 2022
cf Phacidium lauri on left
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Species profile
- Species group:
- Fungi
- Kingdom:
- Fungi
- Order:
- Microthyriales
- Family:
- Microthyriaceae
- Records on NatureSpot:
- 2
- First record:
- 22/02/2014 (Thompson, Peter)
- Last record:
- 03/02/2022 (Nicholls, David)
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