ITALIC 8.0

Acarospora crozalsii B. de Lesd.

Bull. Soc. bot. Franc., 70: 280, 1923.

Synonyms:

Distribution: N - Lig (Sbarbaro 1956, Knudsen & al. 2024).

Description: Thallus crustose, episubstratic, continuously areolate, the areoles often sterile, irregular, angular, separated by deep fissures, mostly (0.5-)1(-2) mm wide, 0.3-0.5 mm thick, flat, usually reddish-brown, epruinose, the lateral surface in upper part brown to black. Epicortex thin, uneven, c. 10 μm thick; cortex 25-40(-60)μm thick, the upper layer red-brown, one-cell thick, the lower layer hyaline, the cells round and 2–4 μm wide, or ellipsoid and c. 4 x 2 μm; algal layer 60-100 μm thick, even, the algal cells mostly 10-15 μm wide; medulla c. 200 μm thick, obscure with mostly 2 μm wide substrate crystals, continuous with the endolithic hypothallus. Apothecia scattered, usually one per areole, flat, even with the upper surface, sometimes reducing an areole to a thalline margin, or rarely elevated in a narrow thalline margin, or sometimes apothecia lower than upper surface, the disc reddish-brown, epruinose, 0.5-1 mm across, round. Proper exciple indistinct, to 10 μm wide, merging into cortex; epithecium reddish-brown, c. 10 μm high; hymenium colourless, usually c. 100 μm high, the hymenial gel euamyloid, IKI+ persistently dark blue; paraphyses 1-2 μm thick at mid-level, the apical cells unexpanded in gel caps with pigment mark, or not in gel caps; subhymenium V-shaped, up to 70 μm high, euamyloid, IKI+ dark blue; hypothecium indistinct, c. 10 μm high, framing the subhymenium, continuous with parathecium. Asci 100-200-spored, 60-70 x 15-18 μm, Ascospores 1-celled, hyaline, ellipsoid, 3-4.5 x 1.5-2 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: unknown, but probably without lichen substances.

Note: a Mediterranean silicicolous species described from Southern France and also known from Algeria, which was treated as a possible synonym of A. complanata by Nimis (1993, 2016). For further details see Knudsen & al. (2024).

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: absent

Humid mediterranean belt: very 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

Herbarium samples

Acarospora crozalsii - photo (J. Kocourková) of sample C0095507F, Field Museum (NH): Spotorno, supra il „Monte“, 9.12.1951, leg. C. Sbarbaro.

Acarospora crozalsii - photo (J. Kocourková) of sample C0095507F, Field Museum (NH): Spotorno, supra il „Monte“, 9.12.1951, leg. C. Sbarbaro.

Acarospora crozalsii - photo (J. Kocourková) of sample C0095507F, Field Museum (NH): Spotorno, supra il „Monte“, 9.12.1951, leg. C. Sbarbaro.

United States National Herbarium - Smithsonian (US:Lichens) Collector: C. Sbarbaro Locality: Spotorno, Liguria, Italy - CC BY-NC 3.0 - Source: Consortium of Lichen Herbaria (2023) http//:lichenportal.org/portal/index.php. Accessed on May, 30, 2024.

United States National Herbarium - Smithsonian (US:Lichens) Collector: C. Sbarbaro Locality: Spotorno, Liguria, Italy - CC BY-NC 3.0 - Source: Consortium of Lichen Herbaria (2023) http//:lichenportal.org/portal/index.php. Accessed on May, 30, 2024.