A Tylophorone hibernico sporodochiis stipitatis pendentibus et thallo C– differt.
Type: Canary Islands, Tenerife, S of Garachico, W of San Juan del Reparo, 565 m, volcanic rock, 2007, D. Ertz 10880 & P. Diederich (BR–holotype; herb. Diederich–isotype).
Description: Thallus crustose, superficial, felty, white, ecorticate; hyphae irregularly branched, hyaline, mainly 1.5–2 µm diam., forming numerous convex to subglobose, pale cream sporodochia 0.4–1 mm diam., produced on white, elongate, straight, simple or exceptionally bifurcate, hanging stipes with a rough surface, 0–1.5 mm long and 0.4–0.6 mm diam. Sporodochial conidia hyaline, smooth, 0–1-septate, with rounded or truncate apices, simple conidia (4.5–)5.5–7.5(–8.5) × (3–)3–4(–4.5) µm (n=50), 1-septate conidia (7–)8.5–12.5(–15) × (3–)3–4(–4.5) µm (n=60). Prothallus whitish, byssoid, 0.5–1 mm wide. Photobiont Trentepohlia. Ascomata and pycnidia unknown.
Chemistry: thallus and stipes of sporodochia C–, K–, KC–, P–, UV–. Sporodochia C+ red, K+ yellowish, KC+ red, P–, UV–. TLC: lecanoric acid, cf. roccellic acid and a colourless substance becoming pale olivaceous or brownish, UV+ green after heating.
Etymology: the stipitate, hanging sporodochia strongly resemble stalactites.
Notes: The new species is easily distinguished from all other known Tylophoron species with Blarneya-type sporodochia by the stipitate sporodochia and the white, felty C– thallus. It is known only from the type locality on underhangs of volcanic rocks in Tenerife (Canary Islands).
from: Ertz, D., Bungartz, F., Diederich, P. & Tibell, L. (2011) Molecular and morphological data place Blarneya in Tylophoron (Arthoniaceae). The Lichenologist. 43(4): 1–12.