Arthonia indistincta C.Knight & Mitt.
A. myophaena Krempelh., Verhandl. zool.-bot. Ges. Wien 26: 459 (1876).
Lectotype: New Zealand. Sine loco (prob. Auckland). Dr. Charles Knight, 1858, BM!
A. myophaena. Type: New Zealand. Sine loco. Charles Knight. M - not seen.
Thallus yellow-brownish or olivaceous to greyish-black, thin, matt or minutely cobwebby or faint pruinose, areolate-cracked, cracks often in parallel lines. Ascocarps numerous, very minute, irregular, subpunctiform to elongate-oblong, often in parallel lines, simple or branched, margin ragged and obscure, to 2 mm long, innate not raised above thallus. Ascospores 3-septate, oblong, constricted centrally, 27-28 × 9-10 µm.
N: ?Auckland. Five collections of Charles Knight in BM.
Endemic
