Slideshow image
Lecidoma demissum (Rustr.) Gotth. Schneider & Hertel
Family: Lecideaceae
[Biatora atrorufa (Dicks.) Fr.,  more]
Lecidoma demissum image
Stephen Sharnoff  
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified | squamulose (squamulous) [th] upper surface: grey(ish) brown | blue(ish) brown (violet brown) [th marginal and upper surface] specific structures: absent ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (median) 1.5 (max) 2.0 ascoma: immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex [ascm, if apoth] disc, mazaedium: brown(ish) black | red(dish) brown (if pale: orange brown) [ascm] paraphyses/-oids: present [ascm] epihymenium, epithecium: red(dish) brown (pale: orange brown) asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent | present [asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc) ascospores: (median) 8.0 [asp] length [µm]: (low) 11.0 (high) 17.0 [asp] width [µm]: (low) 5.0 (high) 7.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent secondary metabolites: absent primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: soil, clay, humus, turf, detritus, dead leaves.