Mycoporum elabens (A. Massal.) Flot. ex Nyl.

Act. Soc. linn. Bordeaux 21, 4: 417, 1857 (1856). Basionym: Rhizocarpon elabens A. Massal. - Ric. Auton. Lich. Crost.: 103, 1852
Description: Thallus crustose, thinly episubstratic, granulose, yellowish white, lichenized. Perithecia immersed into up to 1.2 mm wide, black, stromatoid preudothecia delimited by a dark-pigmented pseudoparenchymatous layer, opening through a small pore. Hamathecium of irregularly branched and anastomosing filaments resembling pseudoparaphyses but deriving from the stromatal tissue, I+ red. Asci 8-spored, obpyriform to obclavate, bitunicate, the wall much thickened in the upper part, with a distinct tholus, not amyloid. Ascospores submuriform, with up to 8 transverse septa and 1 longitudinal septum, hyaline to finally brown, narrowly ellipsoid, 22-40 x 8-12 μm, halonate only when young. Pycnidia black, globose, the wall dark-pigmented. Conidia hyaline, ellipsoid to bacilliform. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P- UV-. Chemistry: without lichen substances.
Note: a rare lichen found on the bark of conifers (Pinus, Abies); in Europe, sterile material was probably overlooked, and most records are historical; recorded from a few localities of the Alps (Switzerland, Austria), but apparently declining. To be looked for in Italy..
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual

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Predictive model

New York Botanical Garden (NY) CC BY NC 3.0 – Source:
Germany, Bavaria