Lecidella effugiens (Nilson) Knoph & Hertel

in Knoph, Bibl. Lichenol., 36: 96, 1990. Basionym: Lecidea effugiens Nilson - Flechtenveget. Sarekgeb.: 27, 1907.
Synonyms: Lecidea albidicinerella Vain. nom. nud.; Lecidea incongruella Vain.; Lecidella albidicinerella (Vain.) Hertel; Lecidella incongruella (Vain.) Hertel & Leuckert
Distribution: N - TAA (Hertel & Schuhwerk 2010). C - Sar.
Description: Thallus crustose, episubstratic, areolate, up to 1 mm thick, grey, whitish or yellowish white, sometimes delimited by a thin dark prothallus, the areoles usually scattered, convex to almost bullate, 0.1-0.2(-0.3) mm wide. Cortex up to 15 µm thick, usually overlain by an epinecral layer; medulla white, I-. Apothecia lecideine, black, constricted at base, 0.4-0.7(-1.3) mm across, with a flat to finally convex, epruinose disc, and a thin, finally often excluded proper margin. Proper exciple greenish black to colourless in outer part, reddish brown within, filled with crystals soluble in K; epithecium green to blackish green, 10-15 µm high; hymenium colourless, 50-70 µm high, not inspersed with oil droplets; paraphyses easily made free in K, simple, rarely branched or anastomosing, 1.5-2 µm thick at mid-level, the apical cells to 5 µm wide; hypothecium pale reddish brown to brown. Asci 8-spored, clavate, with an intensely K/I+ blue tholus penetrated by a faintly amyloid, broadly cylindrical axial mass, and a poorly developed ocular chamber, the wall K/I-, surrounded by a K/I+ blue outer layer, approaching the Lecanora-type. Ascospores 1-celled, hyaline, broadly ellipsoid, 10-16 x 6-9 µm, with a thick, smooth wall, not halonate. Photobiont chlorococcoid. Spot tests: thallus K- or rarely K+ yellow, C- or C+ orange-red, KC- or KC+ orange-red, P- or rarely P+ yellow. Chemistry: atranorin, chloroatranorin, aotearone, 2,5,7-trichloro-3-O-methylnorlichexanthone, 3-O-methylasemone, 3-O-methylthiophanic acid, 5,7-dichloro3-O-methylnorlichexanthone, isoarthothelin, and thiophanic acid.
Note: on more or less calcareous or base-rich siliceous rocks, with optimum near or above treeline; a member of the L. asema complex, probably more widespread in the Alps and to be looked for in the Apennines.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

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

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model

Garry Neil – CC BY-SA NC - Source: https://lichenportal.org/cnalh/taxa/index.php?taxon=53981&clid=1125
USA, Arizona
TSB 26844