ITALIC 8.0

Opegrapha pulvinata Rehm

in Lojka, Verh. zool.-bot. Ges. Wien, 19: 500, 1869.

Synonyms: Leciographa pulvinata (Rehm) Arnold; Trematosphaeria dermatocarponis Werner; Trematosphaeria lophiostoma Werner & M. Choisy

Distribution: N - TAA (Thor & Nascimbene 2007, Hafellner 2009, Brackel 2016), Piem (Brackel 2016). S - Cal (Puntillo 1996, Brackel 2016).

Description: Thallus inapparent, not lichenized, parasitic on the thalli of foliose or squamulose pyrenocarpous lichens, rarely of Staurothele. Apothecia lirelliform, black, partly immersed in the host thallus or finally adnate, 0.2-0.5 x 0.1-0.3 mm, straight or curved, with a slit-like disc, and a sometimes white-pruinose raised margin, aggregated in up to 3(-4) mm wide, dense clusters. Proper exciple black, carbonized, extending below the hymenium, K+ brownish; hymenium colourless to pale yellowish green, 100-110 µm high, I+ persistently blue in upper part; paraphysoids branched and anastomosing, 2.5-3 µm thick, the apical cells hardly swollen; hypothecium pale brown, 12-25 µm high; hypothecium black. Asci 8-spored, broadly club-shaped, the inner layer of endoascus amyloid in upper part, with a reduced I+ blue ring surrounding a small ocular chamber, Varia-type. Ascospores 3-septate, at first hyaline, then soon pale brown, ellipsoid to oblong-ovoid, straight, 18-26 x 6-8 µm, surrounded by a thick gelatinous sheath. Pycnidia black, immersed. Conidia bacilliform, straight, 5-7 x 1 µm. Photobiont absent. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a lichenicolous fungus growing on foliose to squamulose pyrenocarpous lichens (Dermatocarpon, Catapyrenium s.lat. and Endocarpon), more rarely on Staurothele, probably overlooked, and somehow more frequent in Italy.

Growth form: Lichenicolous fungus

Substrata: soil, terricolous mosses, and plant debris

Reproductive strategy: mainly sexual

paras

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: very rare

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

P.L. Nimis CC BY-SA 4.0

TSB 17071

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

Herbarium: TSB (17071)
2001/12/15
on the host, Catapyrenium sp.

P.L. Nimis CC BY-SA 4.0

TSB 17071