Flora of New Zealand Series

A. obtusulum (Nyl.) Müll. Arg., Bull. Herb. Boissier 2, App. 1: 84 (1894).

Arthonia obtusula Nyl., Lich. N.Z.: 123 (1888).

Type: New Zealand. Sine loco? Wellington. Charles Knight, H-NYL - not seen.

Thallus whitish, thin, matt, cracked. Ascocarps black, sessile ± elongate, 0.4 mm wide. Ascospores ellipsoid, colourless, 4-locular, 21-24 × 11-13 µm.

N: Known only from the type collection.

Endemic