ITALIC 7.0

Tomasellia diffusa (Leight.) J. Lahm

Jahresber. Westfäl. Prov.-Vereins, 13: 57-85, 1885. Basionym: Melanotheca diffusa Leight. - Lich. Fl. Gr. Brit.: 467, 1871.

Synonyms:

Distribution: C - Tosc, Umb (Ravera 1999, Ravera & al. 2006), Mol (Caporale & al. 2008).

Description: Thallus crustose, not lichenized, endosubstratic and usually not evident. Ascomata perithecioid, aggregated in number of (1-)4-12 into irregularly shaped, (0.2)0.4-1(-1.5) mm wide, black pseudostromata made of dark brown hyphae, with an overlying black wall which is not continuous below the hamathecium. Hamathecium of branched, not anastomosing, non-amyloid, 1.5-2 µm thick pseudoparaphyses. Asci 8-spored, obclavate, tapering to apex, fissitunicate, with two functional wall layers, K/I-. Ascospores 1-septate with eusepta, at first hyaline but soon turning dark brown, ellipsoid to ovoid, constricted at septum, the two cells slightly unequal, 18-27 x 5-7 µm, the wall not ornamented, often with a distinct, 1-1.5 thick (in K) perispore. Spot tests: all negative. Chemistry: without lichen substances.

Note: a mainly western, rare species, most frequent on the smooth bark of Alnus.

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: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: extremely rare

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

Natural History Museum (2014). Dataset: Collection specimens. Resource: Specimens. http://dx.doi.org/10.5519/0002965 Retrieved: 15:07 19 Feb 2017 (GMT)

Natural History Museum (2014). Dataset: Collection specimens. Resource: Specimens. http://dx.doi.org/10.5519/0002965 Retrieved: 15:07 19 Feb 2017 (GMT)