ITALIC 8.0

Heteroplacidium zamenhofianum (Clauzade & Cl. Roux) Cl. Roux

in Roux & al., Bull. Soc. linn. Provence, 60: 172, 2009. Basionym: Verrucaria zamenhofiana Clauzade & Cl. Roux - Bull. Soc. Bot. Centre-Ouest, n. sér., nr. spéc. 7: 823, 1985.

Synonyms: Dermatocarpon compactum sensu Clauzade & Rondon

Distribution: N - Frl (vidi!), Ven (Nimis 1994), TAA (Nascimbene & al. 2022), Piem (TSB 34795), VA (TSB 29429), Lig.

Description: Thallus crustose, areolate-subsquamulose, dark brown to almost black, 0.2-0.7 mm thick, parasitic on Staurothele areolata. Areoles 0.6-1.5 mm wide, finely crenulate-lobulate, crowded and fitting together like a puzzle, or with slightly overlapping margins, smooth and slightly glossy. Upper cortex well delimited, 20-25 µm thick, the uppermost cell layer with brown pigment, sometimes overlain by a very thin epinecral layer; medulla subparaplectenchymatous; lower cortex limited to the marginal part of areoles, 20-40 µm thick, paraplectenchymatous, pale brown, with granular inspersions, below with colourless, 3-4.5 µm thick rhizohyphae. Perithecia totally immersed; exciple subglobose, 0.18-0.3 mm across, the exciple colourless; involucrellum lacking; paraphyses absent, substituted by simple periphyses; hymenial gel hemiamyloid. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, Verrucaria-type. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, 10-12 x 9-10 µm. Pycnidia immersed, inconspicuous, of the Dermatocarpon-type. Conidia bacilliform, 5-7 µm long. Photobiont chlorococcoid (Myrmecia). Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species with a crustose, dark brown thallus with incised to sublobate areoles, growing on taxa of the Staurothele areolata-group on slightly inclined to subhorizontal surfaces of calcareous rocks in upland areas; widely distributed in Europe and North America, as well as in the Alps, it is easy to overlook due to the thalli of host and parasite being concolorous. To be looked for in the Central Apennines.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Staurothele areolata

Commonnes-rarity: (info)

Alpine belt: rather common

Subalpine belt: rather rare

Oromediterranean belt: absent

Montane belt: absent

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

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

Herbarium: TSB (19702)
2001/12/03
on the host, Staurothele areolata

P.L. Nimis CC BY-SA 4.0

TSB 19702