Amandinea crassiuscula Giralt & Etayo
in Giralt & al., Lichenologist, 32: 522, 2000.
Synonyms:
Distribution:
Description: Thallus crustose-areolate to subsquamulose, episubstratic, 70-150 µm thick, ochraceous to grey brown, rarely with an olivaceous tinge, smooth and shiny, epruinose, the areoles 0.5-1.5 mm wide. Epinecral layer always more or less developed, (7-)10-13(-15) | µm thick; cortical layer 10-20 µm thick, the terminal cells slightly swollen, sometimes with brown pigmented caps; medulla white, I-. Apothecia lecideine (0.2-)0.4-0.7(-1) mm across, broadly sessile, with a dark brown to black, initially flat, but soon convex disc and a thin, often finally excluded margin. Proper exciple well-developed, up to 80 µm thick laterally, more or less of the aethalea-type, homogeneously brown-pigmented , K-, N+ red; epithecium brown, N-; hymenium colourless, 80-100 µm high, not inspersed with oil droplets; paraphyses 1.8-2 µm thick, simple to moderately branched, the apical cells swollen, 4-5(-6) µm wide, with a brown pigment cap; hypothecium dark reddish brown, up to 130 µm high, K-, N+ red. Asci 8-spored, clavate, Bacidia-type. Ascospores 1-septate, brown, ellipsoid with obtuse ends, not constricted at septum, (15-)17-20(-22) x (8-)8.5-10(-11) µm, Buellia-type, with a rugulate ornamentation and ontogeny of type A. Pycnidia common, flask-shaped to cuneiform, unilocular, the wall colourless (brown only near the ostiole). Conidia short-filiform, straight or curved, hyaline, 12-20 x 0.5-0.8 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.Note: an epiphytic, mainly Mediterranean species known from the Iberian Peninsula, differing from A. punctata in the thicker thallus and the much larger ascospores. To be looked for in Italy, especially in the Tyrrhenian Ecoregion.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Predictive model
Source: Giralt M., Etayo J. & Gómez-Bolea A. (2000) Lichenologist 32(6): 521-529
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Predictive model
