Placidiopsis custnani (A. Massal.) Körb.
Parerga Lichenol.: 305, 1863. Basionym: Placidium custnani A. Massal. - Lotus, 6: 78, 1856.
Synonyms: Catapyrenium custnani (A. Massal.) Jatta; Dermatocarpon crenulatum (Nyl.) Mig.; Endocarpidium custnani (A. Massal.) Müll. Arg.; Endocarpon cinereum var. cartilagineum Nyl.; Paraplacidiopsis crenulata (Nyl.) Servít; Placidiopsis cartilaginea (Nyl.) Vain.; Placidiopsis crenulata (Nyl.) Zschacke; Verrucaria crenulata (Nyl.) Nyl.
Description: Thallus squamulose, the squamules crenate-lobulate, scattered to usually contiguous, pale olive brown to brown, olive-green when wet, up to 2-3(-4) mm wide, 0.2-0.4(-0.5) mm thick, the margins ascending and down-rolled; lower surface dark brown to black, paler towards margins. Upper cortex very thin, paraplectenchymatous, composed of 1-2 layers of globose cells, overlain by an up to 30 µm thick epinecral layer; medulla white, of thin-walled, globose cells; lower cortex not developed. Rhizohyphae brown, in the central part usually aggregated into a stout, rhizine-like holdfast. Perithecia black, broadly pyriform to globose, 1-5 per squamule, 0.2-0.23 mm across, immersed, without involucrellum. Exciple blackish brown in upper part, pale below, of tangentially arranged cells; periphyses present around the ostiole, 20-30 x 2-3 μm, interascal filaments absent; hymenial gel hemiamyloid. Asci 8-spored, clavate, thin-walled, the apical region slightly thickened, with a small ocular chamber, K/I-, 50-70 x 10-14 μm. Ascospores 1-septate, hyaline, ellipsoid to fusiform, (12-)14-20(-22) x 5.5-7.5 μm, thin- and smooth-walled, biseriately arranged in the asci. Photobiont chlorococcoid (Diplosphaera). Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
P.L. Nimis CC BY-SA 4.0
GZU - Vezda Lich.Sel.Exs. (951)
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: GZU - Vezda Lich.Sel.Exs. (951)
2003/04/28
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: GZU - Vezda Lich.Sel.Exs. (951)
2003/04/28
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
P.L. Nimis CC BY-SA 4.0
GZU - Vezda Lich.Sel.Exs. (951)
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: GZU - Vezda Lich.Sel.Exs. (951)
2003/04/28
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: GZU - Vezda Lich.Sel.Exs. (951)
2003/04/28
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Placidiopsis_custnani.htm
France, 8/7/2011 - Miribel Jonaje - Rhöne
