ITALIC 8.0

Porpidia zeoroides (Anzi) Knoph & Hertel

in Hertel & Knoph, Mitt. bot. Staatss. München, 20: 477, 1984. Basionym: Lecidea zeoroides Anzi - Comm. Soc. Critt. Ital., 2, 1: 17, 1864.

Synonyms: Huilia macrocarpa var. trullisata (Arnold) Hertel non Porpidia trullisata (Kremp.) Körb.; Lecidea cyclosora Lettau; Lecidea macrocarpa var. trullisata (Arnold) Mig.; Lecidea platycarpa f. trullisata Arnold

Distribution: N - Frl (TSB 7737), TAA (Dalla Torre & Sarnthein 1902, Nascimbene & al. 2022), Lomb, Piem (Isocrono & al. 2004), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020).

Description: Thallus crustose, episubstratic, thick, continuous or rimose-areolate, chalky white to rarely pale grey, sometimes delimited by a black prothallus. Medulla thick, white, I-. Apothecia lecideine, black, 0.4-3 mm across, at first more or less immersed, then sessile and constricted at base, with a concave to finally strongly convex disc, and a thick, raised, often white-pruinose, finally often excluded proper margin. Proper exciple dark brown in outer part, paler brown within, filled with crystals visible under polarized light, which do not dissolve in K; epithecium olive-brown to ochraceous brown, N+ red; hymenium colourless, 90-150 µm high; paraphyses coherent, branched and strongly anastomosing; hypothecium brown to brown-black, with crystals. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, (16-)18-26(-33) x 7-12(-14) µm, halonate. Photobiont chlorococcoid. Spot tests: thallus and medulla K- or K+ yellow, C-, KC-, P- or P+ orange. Chemistry: without lichen substances, or with stictic acid.

Note: on steeply inclined, often north-exposed faces of more or less calciferous rocks in upland areas, reaching beyond treeline in the Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

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

Serge Poumarat - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Porpidia_zeoroides.htm

Ulrich Kirschbaum https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder-x

Ulrich Kirschbaum Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder-x