ITALIC 8.0

Acarospora trachytica Jatta

N. Giorn. Bot. Ital., 14: 127, 1882.

Synonyms:

Distribution: S - Camp (Ricciardi & al. 2000, Knudsen & Nordin 2015).

Description: Thallus crustose, episubstratic, rimose-areolate, the areoles 1-2 mm wide, up to c. 0.7 mm thick, white to pinkish white, turning green when wet, rugulose, broadly attached, without a distinct lower surface. Cortex paraplectenchymatous, 30-40 μm thick, with an up to 40 μm thick epicortex, the cells inspersed with minute granules; algal layer even, continuous; medulla white, heavily inspersed with crystals. Apothecia round, up to 1 mm across, usually one per areole, with an epruinose, flat to convex, reddish brown to reddish black disc, without a distinct thalline margin. Proper exciple indistinct; epithecium brownish; hymenium colourless, 100-120 μm high, the hymenial gel euamyloid, IKI+ persistently dark blue; paraphyses 2-2.5 μm thick at base, the apical cells hardly swollen; subhymenium deep up to 150 μm high; hypothecium indistinct. Asci 50-100-spored, clavate, the apical dome K/I-, 75-90 x 18-24 μm. Ascospores 1-celled, hyaline, globose and 4-6 μm in diam., or subglobose and 4-6 x c. 4 μm. Pycnidia visible as pink dots. Conidia simple, hyaline, c. 2 x 1 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K+ yellow turning red (needle-like crystals), C-, KC-, P+ yellow, UV-. Chemistry: norstictic acid.

Note: the lectotype in UPS is on light trachyte pigmented with a red mineral, and the second syntype is on calcareous tufa (Jatta 1882). The species is currently known only from coastal Italy in the region of Naples. For a detailed description of this long-forgotten, but well-distinct species see Knudsen & Nordin (2015).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than 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: extremely rare

Dry mediterranean belt: very rare

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

K. Knudsen & A. Nordin, Opuscula Philolichenum, 14: 90-92,

Italy
2015
HOLOTYPE (UPS)

Source of image: K. Knudsen & A. Nordin, Opuscula Philolichenum, 14: 90-92, 2015

Italy
HOLOTYPE (UPS)