Gregorella humida (Kullh.) Lumbsch
in Lumbsch & al., Lichenologist, 37: 300, 2005.. Basionym: Biatora humida Kullh. - Not. Sällsk. Fauna Fl. Fenn. Förh., Ny Ser., 11: 274, 1871.
Synonyms: Lecidea humida (Kullh.) Th. Fr.; Leprocollema europaeum H. Magn.; Moelleropsis humida (Kullh.) Coppins & P.M. Jørg.
Distribution:
Description: Thallus crustose, olivaceous brown, dull grey-brown to almost black when dry, subgelatinous when wet, entirely consisting of 30-60 µm wide, corticate (covered by a layer of small, isodiametric cells), granular goniocysts. Apothecia biatorine, up to 0.3-0.4(-0.5) mm across, sessile, with a convex, colourless to medium brown (when dry) disc, and a thin, soon excluded proper margin. Proper exciple poorly developed, of long-celled, thin-walled hyphae; epithecium poorly delimited from hymenium; hymenium colourless, K/I-; paraphyses simple or sparingly branched, slender, 1-1.5 µm thick, easily made free, simple to sparingly branched in upper part, the apical cells not swollen; hypothecium colourless. Asci 8-spored, clavate, apically thickened, without any amyloid apical structures, approaching the Trapelia-type. Ascospores 1-celled, hyaline, ellipsoid, (12-)14-20(-25) x 7-10 µm, thin-walled, sometimes with a single pseudo-septum and appearing 2-celled, not halonate. Photobiont cyanobacterial (Nostoc, the cells in short chains). Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.Note: a rather ephemeral, short-lived species, pioneer on soil and debris, e.g. on dump heaps and margins of white roads; widespread in the boreal to temperate zones of Europe, but rare, but perhaps overlooked. Known from a single locality in the Alps (Austria); to be looked for in Italy .
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Pioneer species
Predictive model
P.L. Nimis CC BY-SA 04
TSB 32706
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32700)
2003/03/05
Pier Luigi Nimis - CC BY-SA 4.0
TSB 32706
P.L. Nimis CC BY-SA 04
TSB 32706
P.L. Nimis CC BY-SA 04
TSB 32706
P.L. Nimis CC BY-SA 04
TSB 32706
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Pioneer species
Predictive model
Index Fungorum
GBIF
P.L. Nimis CC BY-SA 04
TSB 32706
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32700)
2003/03/05
Pier Luigi Nimis - CC BY-SA 4.0
TSB 32706
P.L. Nimis CC BY-SA 04
TSB 32706
P.L. Nimis CC BY-SA 04
TSB 32706
