The type specimen was collected in 1973 from Cinque Cases, Aldabra, where it was found growing on dead Pemphis.

[2] Cratiria sorediata has a slightly shiny, corticate thallus that is smooth and pale ochraceous grey, covering an area of up to 3 cm (1.2 in) in diameter.

Soredia are formed in roundish, shallow soralia, later covering much of the thallus, and are ochraceous yellow in colour.

[2] Apothecia (fruiting bodies) of Cratiria sorediata are sessile, round to wavy in outline, saucer-shaped, and measure 0.3–0.5 mm in diameter.

The margin of the apothecium is prominent, raised above the disc; it is black and shiny, measuring about 0.1 mm wide.