Clavascidium semaforonense (Breuss) M. Prieto

in Prieto & al., Am. J. Bot., 99: 28, 2012. Basionym: Catapyrenium semaforonense Breuss - Stapfia, 23: 112, 1990.
Synonyms: Dermatocarpella yunnana H. Harada & Li-S. Wang; Endopyrenium hepaticum f. nigratum Müll. Arg.; Placidium semaforonense (Breuss) Breuss
Distribution: C - Sar. S - Pugl.
Description: Thallus squamulose, pale to dark brown, often grey-pruinose at margins, dull. Squamules 3-7 mm broad, 0.3-0.55 mm thick, rounded to lobulate, concave to slightly convex, smooth, with an undulate, mostly up-turned margin, scattered to contiguous, not imbricate. Lower surface pale, but often becoming dark with age, attached by dichotomously branched, up to 10 mm long and up to 0.25 mm thick, robust but fragile, pale rhizines and by 3-5.5 µm thick, colourless rhizohyphae. Upper cortex paraplectenchymatous, 50-110 μm thick; medulla with elongated cells running horizontally in upper part, and subspherical cells in lower part; lower cortex poorly differentiated from the medulla, with cells not arranged in vertical rows. Perithecia frequent, laminal, immersed in the squamules, globose to pyriform, up to 0.5 mm in diam., without involucrellum. Exciple pale throughout; hymenial gel K/I+ blue; hamathecium of periphyses, interascal filaments absent. Asci 8-spored, clavate, thin-walled, I-, without a tholus. Ascospores 1-celled, hyaline, broadly ellipsoid, thin-walled, uniseriately arranged, (12-)14-18(-19) x (7-)7.5-9(-10) μm. Pycnidia black, marginal, immersed, Dermatocarpon-type. Conidia ellipsoid, 3-4.5 x 1.5-2 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a Macaronesian-Mediterranean to Irano-Turanic terricolous lichen, also known from on fine-sandy soils in open, dry Mediterranean grasslands and garrigues. See also note on the genus.
Growth form: Squamulose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: very rare
Dry mediterranean belt: rare

pH of the substrata:

12345

Solar irradiation:

12345

Aridity:

12345

Eutrophication:

12345

Poleotolerance:

0123

Altitudinal distribution:

123456


Predictive model
Herbarium samples


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (7594)
2001/12/08



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (7594)
2001/12/08


Manuel Gil
Spain, Canary Islands, Lanzarote


Manuel Gil
Spain, Canary Islands, Lanzarote