Aphanopsis coenosa (Ach.) Coppins & P. James

Lichenologist, 16: 248, 1984. Basionym: Collema coenosum Ach. - Lichenogr. Univ.: 629, 1810.
Synonyms: Aphanopsis terrigena (Ach.) Nyl ex P. Syd.; Biatora comensis Anzi; Lecidea comensis (Anzi) Jatta; Lecidea humigena Taylor; Lecidea praecox Vězda; Lecidea terrigena Ach.
Distribution: N - Lomb (Anzi E. C. I. II 1123: Printzen 1995).
Description: Thallus crustose, poorly delimited, dark green to green-brown, gelatinous when wet, pseudoparenchymatous, consisting of goniocysts surrounded by hyphae, the outer ones with brown-pigmented walls. Apothecia micareoid, 0.2-0.6 mm across, with a brown to brown-black, strongly convex disc, without a distinct proper margin. Proper exciple very much reduced, of a few thread-like hyphae resembling paraphyses, colourless to brownish; hymenium colourless, with red-brown vertical streaks reacting K+ dark brown, 150-200 µm high, I- (but appearing I+ blue due to the amyloid ascal walls); paraphyses simple or rarely forked in upper part, arranged in densely entangled clusters, with conspicuous septa, 2-3.5(-4) µm thick, not surrounded by a distinct hymenial gel; hypothecium pale brown, scarcely distinguishable from the hymenium. Asci 8-spored, cylindrical-clavate, with relatively thick, multi-layered, amyloid walls, the apical dome with a broad, K/I+ blue plug flattening out at maturity, opening apically with an irregular fissure. Ascospores 1-celled, hyaline to pale brown when overmature, broadly ellipsoid, sometimes apiculate at one or both ends, 25-38 x 13-18 µm, thin-walled, often guttulate. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on humid, bare, clayey or fine-grained sandy soil on track sides or ditch margins in deciduous woodlands, with optimum in the montane belt. Easy to overlook, but certainly not common in Italy.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: extremely rare
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
Herbarium samples

P.L. Nimis CC BY-SA 4.0
TSB 13672

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13672)