Hydropunctaria/Verrucaria sp

Hydropunctaria/Verrucaria sp

Observation - Hydropunctaria/Verrucaria sp. Description: Growing from below the average high tide level where is covers large areas looking like black rock, gradually petering out in the orange zone where it is mostly to be found in crevices in the rocks. Tiny cracks and bumps in its surface, but very hard to s

Growing from below the average high tide level where is covers large areas looking like black rock, gradually petering out in the orange zone where it is mostly to be found in crevices in the rocks. Tiny cracks and bumps in its surface, but very hard to see even with my hand lens. This might be Hydropunctaria maura, but I aware that there are others that need to be considered.