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Verrucaria calkinsiana Servit  
Family: Verrucariaceae
Verrucaria calkinsiana image
Gerhard Neuwirth  
Verrucaria calkinsiana image
Troy McMullin  
Verrucaria calkinsiana image
Othmar Breuss  
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image
Verrucaria calkinsiana image