Irish lichens

Graphina anguina
Order: Ostropales       Family: Graphidaceae

Species: Graphina anguina

Growth type crustose, graphid.
Photos: On Sycamore. Macroom, Co. Cork, SW Ireland.
Specimen identified by John Douglass

Thallus whitish-grey, slightly shiny and often wrinkled or cracked. Margin of immersed apothecia often slightly elevated, carbonaceous margin flat with narrow disc. Lirellae are short, serpentine, usually star-shaped and often pruinose.
Ascus 8-spored. Colourless muriform spores, 20+ cells, 7-11 transverse septa, 25-50 x 12-16 Ám. Micro photographs below.

Throughout Ireland on slightly shaded smooth-barked trees, often in secondary woodland or coppices. Chemical reactions negative.

Similar: Graphis scripta

Graphina anguina

Graphina anguina

Microscope photographs
Graphina anguina, microscope photo

Graphina anguina, ascus and spores

Graphina anguina, muriform spores

Graphina anguina, immature spores
Graphina anguina. November 2009

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