ITALIC 8.0

Thalloidima physaroides (Opiz) Kistenich, Timdal, Bendiksby & S.Ekman

Taxon, 67: 897, 2018.. Basionym: Lecidea physaroides Opiz - Lotos, 6: 158, 1856.

Synonyms: Bacillina antipolitana Nyl.; Biatorina lurida (Bagl. ex Arnold) Jatta; Thalloidima luridum Bagl. ex Arnold; Toninia alluviicola M. Choisy; Toninia lurida (Bagl. ex Arnold) H. Olivier; Toninia physaroides (Opiz) Zahlbr.

Distribution: N - Ven, Emil (Nimis & al. 1996, Fariselli & al. 2020), Lig (Watson 2014). C - Tosc (Loppi & al. 1998, Putortì & al. 1999c), Marc (Nimis & Tretiach 1999), Umb (Ravera & al. 2006), Laz, Abr (Nimis & Tretiach 1999), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar. S - Camp (Garofalo & al. 1999, Aprile & al. 2003b), Pugl (Nimis & Tretiach 1999), Bas (Potenza 2006, Potenza & al. 2010, Potenza & Fascetti 2012), Cal (Puntillo 1996).

Description: Thallus squamulose to subfruticose, the squamules 1-2(-3) mm broad, to several mm long, scattered to usually contiguous and forming cushions, convex and bullate when young, then often becoming elongate and columnar, simple or branched above, dark grey to dark greyish green, weakly pruinose to epruinose, with numerous, punctiform to slightly elongated, white pseudocyphellae. Upper cortex 15-50 µm thick, including an up 20 µm thick epinecral layer (often thin or absent); algal layer continuous; medulla white, lacking crystals. Apothecia very rare, lecideine, rounded, sessile, strongly constricted at base, up to 6(-8) mm across, with a black, faintly pruinose to usually epruinose, flat to convex, smooth disc, and a distinct, smooth, concolorous proper margin. Proper exciple dark grey in outer part, pale grey to colourless within, the pigmented parts K+ and N+ violet; epithecium grey, K+ and N+ violet; hymenium colourless, 60-70 µm high; paraphyses coherent, simple or sparingly branched and anastomosing in upper part, thin-walled, the apical cell distinctly swollen and covered by a gelatinous pigment cap; hypothecium pale brown to colourless. Asci 8-spored, clavate, surrounded by a gelatinous I+ blue coat, with a well-developed I+ blue tholus with a I+ darker blue tube and a well-developed ocular chamber, Bacidia-type. Ascospores 1-septate, hyaline, fusiform, 11-19 x 3.5-5 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances or with traces of fatty acids; Sedifolia-grey pigment in apothecia.

Note: a mainly temperate species, most common on soil developing from calciferous sandstone, often amongst mosses and associated to cyanobacterial lichens when young, rare in limestone areas.

Growth form: Squamulose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: very rare

Dry mediterranean belt: rare

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (14164)
2001/12/01

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (14164)
2001/12/01
detail of pseudocyphellae

P.L. Nimis CC BY-SA 04

TSB 4659

P.L. Nimis CC BY-SA 04

TSB 14164

P.L. Nimis CC BY-SA 04

TSB 14164

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Thalloidima_physaroides.htm

France, sur sol calcaire - session AFL 2010 - Hérault

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Thalloidima_physaroides.htm

France, sur sol calcaire - session AFL 2010 - Hérault

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Thalloidima_physaroides.htm

France, sur sol calcaire - session AFL 2010 - Hérault