ITALIC 8.0

Harpidium rutilans Körb.

Syst. Lich. Germ.: 157, 1855.

Synonyms: Zeora rutilans Flot. nom. nud.

Distribution: N - TAA. S - Si.

Description: Thallus crustose, episubstratic, dark reddish brown, areolate, the areoles contiguous, angular, 0.2-0.5(-0.9) mm wide, the peripheral ones slightly elongate, up to 1.1 mm long, forming small, subplacodioid, up to 1 cm wide rosettes, without a distinct pro- or hypothallus. In section the thallus is homoiomerous and pseudoparenchymatous throughout, often overlain by a thin epinecral layer, 130-140 mm thick, the hyphae with more or less isodiametrical, 5-8 mm wide cells. Apothecia pycnoascocarps (developing from pycnidia), lecanorine-aspicilioid, 0.1-0.3 mm across, at first punctiform, then with an expanded disc, immersed in the areoles (usually 1 per areole) with a dark reddish brown, sometimes marginally slightly pruinose disc, and a very thin, finally often excluded thalline margin. Proper exciple poorly developed; epithecium pale reddish brown, K/I+ blue; hymenium colourless, 40-50 mm high, K/I+ blue; paraphyses strongly moniliform, branched in upper part, the apical cells not swollen; hypothecium colourless, opaque, 40-45 mm thick. Asci 8-spored, subglobose, unitunicate-rostrate, the wall composed of an outer, non-expansible and an inner, expansible layer surrounding the protoplast as an amyloid collar, which expands during spore release into a long, tapering rostrum, the outer wall layer strongly amyloid. Ascospores 1-celled, hyaline, narrowly ellipsoid, reniform, allantoid to lunate, rarely shortly sigmoid, twisted, (8–)9.5–15(–17) × (3–)3.5–6(–6.5) μm. Photobiont chlorococcoid. Spot tests: Thallus K-, C-, KC-, P-, UV-, I+ reddish. Chemistry: without lichen substances.

Note: on steeply inclined surfaces of siliceous rocks with periodical water seepage after rain, both in the Mediterranean Region and in dry-warm Alpine valleys; perhaps overlooked, but certainly not common.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: very 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

P.L. Nimis CC BY-SA 4.0

TSB 16615

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

Herbarium: TSB (16615)
2001/11/24

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

Herbarium: TSB (16615)
2001/11/24