lecidella lichen
Lecidella euphorea
Description 2
Thallus: crustose, granulose, rimose to areolate, 0.30.5(-1.2) mm thick; prothallus: absent or present, black; surface: whitish to yellowish gray or yellowish to grayish white, smooth, dull, without soredia or isidia; Apothecia: moderately abundant, orbicular, semi-immersed to sessile, slightly constricted at base, 0.8-1.2 mm in diam.; disc: black, plane to convex to strongly convex when old, epruinose; margin: distinct from the beginning, up to 0.1 mm thick, becoming excluded; exciple: bluish to greenish black, without algal cells; parathecium: reddish brown to rarely yellowish brown, without crystals; epihymenium: blackish green to bluish green, rarely hyaline only when yellowish crystals are present, with or without crystals; hymenium: hyaline, 55-75-100 µm tall, not inspersed; paraphyses: simple, rarely anastomosing or branched, not or slightly thickened apically; hypothecium: reddish brown to rarely yellowish brown; asci: clavate, lecanoral, 8spored; ascospores: hyaline, simple, broadly ellipsoid, ellipsoid to ovoid, 7-16 x 4.5-10 µm; wall: thick and smooth, not halonate; Pycnidia: not seen; Spot tests: thallus surface: K+ yellow, KC+ yellow, C+ orange, P+ yellow; Secondary metabolites: 2,5,7-trichloro-3-O-methylnorlichexanthone, 3-O-methylasemone (=4,5,7-trichloro-3O-methylnorlichexanthone), 3-O-methylthiophanic acid (=2,4,5,7-tetrachloro-3-O-methylnorlichexanthone), 5,7-di chloro-3-O-methylnorlichexanthone, atranorin, isoarthothelin (=2,5,7-trichloronorlichexanthone), and thiophanic acid (=2,4,5,7-tetrachloronorlichexanthone).; Substrate and ecology: on wood or bark in the alpine zones; World distribution: temperate parts of Asia, Europe, and North America; Sonoran distribution: widespread in Arizona, southern California, Baja California, Chihuahua and Sinaloa.; Notes: Lecidella euphorea can be distinguished from L. elaeochroma by its usually smaller apothecia, narrower exciples, thinner hypothecium and smaller spores. Lidella euphorea has in the Sonoran region often an inspersed epihymenium (crystals) which cannot be observed in L. elaeochroma. Lecidella elaeochroma has often an inspersed hymenium, not crystalline, whereas L. euphorea has no inspersion in the hymenium but often has a crystalline inspersion in the epihymenium.
Fuentes y créditos
- (c) André Aptroot, algunos derechos reservados (CC BY-NC-SA), http://www.tropicallichens.net/photopath/lecidella-euphorea-taiwan.jpg
- (c) Lichen Unlimited: Arizona State University, Tempe., algunos derechos reservados (CC BY-NC-SA), http://eol.org/data_objects/10548454
