Polyblastia dermatodes Verrucariaceae
Polyblastia dermatodes

Growth type crustose. Identified by Brian Coppins
Chemical results negative. BLS conservation evaluation: LC NS

Frequent on limestone and other calcareous rocks

Endolithic white or greyish thallus with immersed perithecia in well-defined pits. Spores submuriform 25-50 x 12-25 µm with 3-4 transverse and 1-2 longitudinal septa (6-14 cells visible in section). Micrographs below.

Very difficult to separate from Thelidium incavatum which has spores that are usually 3-septate with only very occasional longitudinal septa. Both species are under revision as they are possibly synonymous.


Polyblastia dermatodes

Polyblastia dermatodes

Microscope photographs
Polyblastia dermatodes

Polyblastia dermatodes

Polyblastia dermatodes
Polyblastia dermatodes
Wimborne, Dorset. February 2017

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