ITALIC 7.0

Thelocarpon citrum (Wallr.) Rossman

Stud. Mycol., 42: 221, 1999. Basionym: Sphaeria citrum Wallr. - Fl. Crypt. Germ., 2: 788, 1833.

Synonyms: Thelocarpon arenicola Vain.; Thelocarpon herteri J. Lahm; Thelocarpon vicinellum Nyl.

Distribution: N - TAA (Nascimbene & al. 2022).

Description: Thallus crustose, not lichenized, consisting of scattered, globose to conical, bright yellow-pruinose, small, up to 0.3-0.4 mm wide and up to 0.4(0.5) mm tall fruiting warts. Ascocarps frequent, perithecioid, immersed in the warts, with a concave, not exposed disc, opening through a small apical pore. Exciple 20-25 μm thick in upper part, 15-18 μm in lower part, colourless, without algae; hymenial gel I-; paraphyses slender, simple, not apically thickened, as long as the asci. Asci many-spored, globose to flask-shaped, tapering to apex, persistent, the wall uniformly thin, I+ dark blue. Ascospores 1-celled, hyaline oblong-obtuse, thin-walled, 4-5 x 1-2 μm. Pycnidia, rare, immersed in the warts, with a colourless wall. Conidia oblong-obtuse, simple. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: yellow pruina with pulvinic acid derivatives.

Note: an ephemeral species of disturbed habitats, with optimum near treeline. T. vicinellum was described from Italy, on decaying algae on porphyritic stones in a damp, shaded place; the relationships with T. superellum need to be clarified.

Growth form: Fungus

Substrata: rocks, soil, terricolous mosses, and plant debris

Reproductive strategy: mainly sexual

Pioneer species

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely 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

Index Fungorum GBIF