Caloplaca crenulatella

Caloplaca crenulatella. A relatively recently described species that has only frequently found on concrete, but it is apparently quite common. It is best distinguished by jizz; it has rather obvious scattered yellow bits of thallus more or less concolorous with the apothecia, and will be learnt fairly rapidly if hunted for on concrete. This photograph was taken on the south side of Gorey Church in Jersey.

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