Lecidea thomsonii Zahlbr.
Type: New Zealand. Southland, Bluff, on coastal rocks, 8/1933. J.S. Thomson 185, W - not seen.
Thallus pale ochraceous or dingy yellowish-brown, 0.1 mm thick, roughened, continuous or minutely cracked, obscurely delimited. Apothecia ± scattered, sessile, rounded, black, epruinose, 0.8 mm diam., plane to subconvex, margins narrow, persistent, slightly raised, entire, white or pale at first then black. Hymenium colourless, 90-100 µm tall, with a greenish-black epithecium above. Paraphyses filiform, dense, slightly constricted at apices. Hypothecium dense, brown-black. Ascospores broadly ellipsoid, 11-12 × 6-7 µm.
S: Southland. Known only from the type collection.
Endemic
The type specimen (W) is from compacted soil. Material of this taxon from Thomson's herbarium (CHR; OTA) is associated with Rinodina thiomela.
