ITALIC 8.0

Mycomicrothelia macularis (Hampe ex A. Massal.) Keissl.

Rabenh. Krypt.-Flora, 9, 1, 2: 36, 1936. Basionym: Microthelia macularis Hampe ex A. Massal. - Miscell. Lichenol.: 58, 1856.

Synonyms: Didymosphaeria analeptoides (Bagl. & Carestia) Rehm; Melanospora macularis (Hampe ex A. Massal.) Körb.; Microthelia analeptoides Bagl. & Carestia; Tomasellia macularis (Hampe ex A. Massal.) Blomb. & Forssell; Verrucaria analeptoides (Bagl. & Carestia) Hue

Distribution: N - Piem (Isocrono & al. 2004).

Description: Thallus crustose, fully endosubstratic and very poorly evident. Perithecia black, circular to elliptical in surface view, 0.1-0.2 mm across, abundant, sometimes crowded and then occasionally confluent, projecting only with the ostiole, with a dark brown, mainly 9-12 µm thick involucrellum reacting K+ olive-green, extending laterally and forming a distinct, up to 50 µm wide, dark brown to black fringe around the perithecium, formed of incorporated bark cells and radially oriented, 2-3 µm thick, rather uneven, irregularly branched, smooth-walled cells. Exciple often poorly developed to absent in lower part, 2-8 µm thick, composed of 1-5, 2-3 µm wide layers of interwoven hyphae, compacted, more or less brown. Hamathecium of branched and anastomosing, persistent, filiform, rather sparse, 2-3 µm thick pseudoparaphyses; hymenial gel I-. Asci 8-spored, elongate-clavate, with two functional wall layers, fissitunicate, with an internal apical beak, K/I-. Ascospores, 1-septate and constricted at septum, brown, ellipsoid, the upper cell slightly longer and broader, the ends rounded, 11-18 x 4-7 µm, the wall warted, with a c. 2 µm thick gelatinous sheath swelling in K. Pycnidia black, immersed, 30-50 µm across, with only the deeply pigmented ostiole visible, the walls pseudoparenchymatous with pale brown cells; conidiogenous cells simple, hyaline, elongate-ampulliform, phialidic, 5-8 x 2-3 µm. Conidia bacilliform, hyaline, 5-8 x 0.7-1.5(-2) µm. Photobiont: usually absent or thallus hyphae loosely associated with Trentepohlia. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a non-lichenized species growing on twigs of shrubs, mostly of Daphne and Ribes; probably more widespread in the Alps.

Growth form: Fungus

Substrata: bark

Reproductive strategy: mainly sexual

Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very 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

Felix Schumm - CC BY-SA 4.0

[Laurila7077], Finland, Prov. Kuusamo, Par. Salla, ad flumen Kutsajok in ripa accidentali locus Nivajanvi (ad insulam), ad corticem Daphnis mezerei in graminosa riparia. Leg. M. Laurila (no 7077, plantae fennicae), 25.07.1937, det. A. Aptroot

Felix Schumm - CC BY-SA 4.0

[Laurila7077], Finland, Prov. Kuusamo, Par. Salla, ad flumen Kutsajok in ripa accidentali locus Nivajanvi (ad insulam), ad corticem Daphnis mezerei in graminosa riparia. Leg. M. Laurila (no 7077, plantae fennicae), 25.07.1937, det. A. Aptroot

Felix Schumm - CC BY-SA 4.0

[Laurila7077], Finland, Prov. Kuusamo, Par. Salla, ad flumen Kutsajok in ripa accidentali locus Nivajanvi (ad insulam), ad corticem Daphnis mezerei in graminosa riparia. Leg. M. Laurila (no 7077, plantae fennicae), 25.07.1937, det. A. Aptroot

Felix Schumm - CC BY-SA 4.0

[Laurila7077], Finland, Prov. Kuusamo, Par. Salla, ad flumen Kutsajok in ripa accidentali locus Nivajanvi (ad insulam), ad corticem Daphnis mezerei in graminosa riparia. Leg. M. Laurila (no 7077, plantae fennicae), 25.07.1937, det. A. Aptroot

Source: Keissler K. von 1938. Pyrenulaceae, Mycoporaceae, Coniocarpineae. In: Rabenhorst G L: Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. 2nd, IX, Die Flechten, Abt. 1, 2. Gebr. Borntraeger, Leipzig, pp. 1-846.

Source: Keissler K. von 1938. Pyrenulaceae, Mycoporaceae, Coniocarpineae. In: Rabenhorst G L: Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. 2nd, IX, Die Flechten, Abt. 1, 2. Gebr. Borntraeger, Leipzig, pp. 1-846.