[2] The lichen has a thallus up to 5 cm (2 in) in diameter, smooth to areolate, white to cream-coloured, and water-repellent, measuring 50–100 μm thick.

[2] Ascomata are punctiform or slightly comma-shaped, perithecioid, measuring 0.05 by 0.05–0.10 mm, with a disc that is dark brown to black and epruinose.

Conidiomata appear as dark brown dots along the thallus margin, and conidia are rod-shaped, measuring 0.7 by 2.0–2.5 μm.

[2] The thallus of Enterographa aldabrensis reacts C−, K+ (yellowish), P+ (yellow), UV+ (cream-coloured) to standard chemical spot tests.

[2] Enterographa aldabrensis is recognised by its thin, pale thallus with black punctiform, immersed ascomata arranged in lines.