Thallus encrusting or warty, epilithic and affixed by cell adhesion. Structure pseudoparenchymatous; organisation dorsiventral; construction monomerous, consisting of a single system of branched filaments that collectively contribute to a ventrally situated core, and a peripheral region where portions of core filaments or their derivatives curve outwards towards the thallus surface, each filament composed of cells 2–6 µm in diameter and 5–22 filT1 long; a single epithallial cell terminating filaments at the thallus surface, distal walls rounded or flattened but not flared; cells of adjacent filaments joined by cell-fusions, secondary pit-connections absent; trichocytes occurring at thallus surface, arranged in horizontal fields or singly, not becoming buried within thallus.

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