Bacidia parathalassica Llop & Gómez-Bolea

Mycotaxon, 72: 80, 1999.
Distribution: C - Tosc (Benesperi & al. 2013). S - Si (Llop 2002).
Description: Thallus crustose-verruculose, episubstratic, grey-green. Cortex paraplectenchymatous, inspersed with minute crystals dissolving in K but not in N. Apothecia lecideine, yellowish orange to reddish orange, becoming darker with age, (0.3-)0.4-1(-1.2) mm across, with a flat to slightly convex disc, and a raised, initially white-pruinose proper margin. Proper exciple prosoplectenchymatous, with oblong, 4-10 x 2.5-4 µm terminal cells, and abundant crystals dissolving in N but not in K: epithecium 3-7 µm high, with minute, colourless crystals dissolving in N but not in K; hymenium colourless, 60-70(-75) high; paraphyses simple or forked in upper part, adglutinated, c. 1 µm thick at mid-level, the apical cells slightly swollen, up to to 2.5-3 µm wide; hypothecium colourless to straw-coloured, K+ intensifying ye11ow. Asci 8-spored, cylindrical-clavate, surrounded by a gelatinous I+ blue coat, with a well-developed I+ blue tholus, a I+ darker blue tube and a well-developed ocular chamber, Bacidia-type. Ascospores (3-)5-7-septate, hyaline, needle-like, straight, (30-)36-52(-59) x 2-2.8(-3) µm. Pycnidia immersed, yellowish brown. Conidia simple, filiform, curved, 10-21 x 0.5-0.8 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ yellow-brown, KC-, C-, P-. Chemistry: thallus with atranorin, usually in low amounts; apothecia with the rubella-orange pigment.
Note: a recently-described, probably Mediterranean-Atlantic species related to B. fraxinea and B. rubella, but restricted to coastal, humid situations on littoral shrubs, especially Juniperus. See also note on B. fraxinea. The species is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

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

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

P.L. Nimis CC BY-SA 04
TSB 13156

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13156)