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Dermatocarpon miniatum

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description Dermatocarpon miniatum Overview

Dermatocarpon miniatum is an umbilicate foliose lichen that grows attached to rock by a central point. It has a leathery thallus that may appear reddish brown, with the outer portions extending away from the attachment point. The species is commonly found on calcareous rocks in the Northern Hemisphere and may occur on rock surfaces that become periodically wet, including habitats near streams and other exposed water sources.

help Dermatocarpon miniatum FAQ

What does umbilicate mean in Dermatocarpon miniatum?

Umbilicate means the lichen is attached to rock by a single central holdfast, like an umbrella attached at its center. The leathery lobes extend outward from that attachment point.

Where does Dermatocarpon miniatum grow?

It is commonly found on damp, sheltered calcareous rock, including limestone outcrops, rock fissures, and some sea cliffs. It can form gray-brown or reddish-brown leathery patches close to the stone.

How can I distinguish Dermatocarpon miniatum from Umbilicaria?

Dermatocarpon miniatum often has tiny dark perithecia or black dots on its upper surface and a smooth lower surface. Umbilicaria species are more commonly associated with siliceous upland rock and often have larger, more obvious apothecia.

Is Dermatocarpon miniatum a crustose or foliose lichen?

It is an umbilicate foliose lichen, even though its tough body can look fairly flat against the rock. Its broad lobes and central attachment separate it from a crustose lichen that forms a continuous paint-like crust.

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