ITALIC 7.0

Porina leptosperma Müll. Arg.

Flora, 66: 333, 1883.

Synonyms: Phylloporina leptosperma (Müll. Arg.) Müll. Arg.

Distribution: S - Cal (Puntillo & Vezda 1994, Puntillo 1995, 1996, 2000).

Description: Thallus crustose, thinly episubstratic, smooth, grey to grey-green, continuous or forming dispersed, up to 6 mm wide patches, without a distinct prothallus. Perithecia 0.1-0.15 mm across, globose, strongly constricted at base, dark reddish brown, somehow shiny, rarely partly covered by hyphal tissue. Involucrellum 10-12 μm thick, yellowish red, K+ orange (Porina-yellow pigment), not extending down to the substrate; algal cells present in a layer between the involucrellum and the perithecial wall; exciple prosoplectenchymatous, colourless or pale yellow, more or less indistinct in upper part, 8-12 μm thick at base; paraphyses richly branched and anastomosing, c. 1 µm thick; hymenial gel I-, K/I-. Asci 8-spored, obclavate, thin-walled throughout, functionally unitunicate, dehiscent by rupture of the apex, with no extruded inner layers and an apical ring structure, I-, K/I-. Ascospores 3-septate, hyaline, subfusiform to almost bacilliform with subobtuse ends, 15-20 x 3-4 µm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus without lichen substances.

Note: an obligately foliicolous lichen with tropical-subtropical affinities; the Italian material is from cladodes of Ruscus near a creek in a warm-humid forest. It is included as “Critically Endangered” in the Italian red list of epiphytic lichens (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: leaves

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: extremely 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

Index Fungorum GBIF

Domenico Puntillo - CC BY-SA 4.0

Italia

Author: André Aptroot - Source: http://www.tropicallichens.net/ CC BY-SA-NC