Scytinium turgidum (Ach.) Otálora, P.M. Jørg. & Wedin
Fungal Divers., 64, 1: 291, 2013. Basionym: Collema turgidum Ach. - Lichenogr. Univ.: 634, 1810.
Synonyms: Collemodium turgidum (Ach.) Nyl.; Leptogium turgidum (Ach.) Cromb.
Distribution: N - Ven, TAA (B 60 0197069), Lomb, Piem, Emil (Fariselli & al. 2020). C - Tosc (Ravera & al. 2023b), Abr. S - Camp, Pugl (S-L35897).
Description: Thallus subfoliose, rather thick, gelatinous when wet, the central parts of densely packed, warted to subcylindrical lobes, the margins distinctly lobed, forming regular to irregular rosettes. Lobes small, (0.1-)0.2-1 mm wide and to 2.5 mm long, sometimes ascending and appearing shrubby, dark olive-or red-black, somewhat shiny, strongly wrinkled to plicate, with down-turned margins, often densely granular-isidiate, the isidia 60-100 μm in diam. Upper and lower cortex composed of a single layer of angular cells, the layer inbetween of intertwined hyphae and loosely arranged chains of Nostoc. Apothecia absent to numerous, 0.5-3 mm across, with an initially concave, then flat, brown disc and a swollen, entire or slightly granular-isidiate thalline margin. Epithecium brownish; hymenium and hypothecium colourless; paraphyses coherent, mostly simple, the apical cells slightly swollen. Asci 8-spored, narrowly clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores at first 3-septate, then submuriform, with 4-5 transverse septa and 1 longitudinal septum, hyaline, ellipsoid, often apiculate at one or both ends, 20-34 x (8-)10-14 μm. Photobiont cyanobacterial (Nostoc, the cells in short chains). Spot tests: all negative. Chemistry: without lichen substances. Note: on calcareous rocks in surfaces with some water seepage after rain. The sample in B was identified by H. Sipman. According to Jørgensen (in litt.) this species could prove to be just a growth form of S. schraderi, one where the fruticose part is poorly developed.
Growth form: Crustose
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
On otherwise dry surfaces with short periods of water seepage after rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: very rare
Padanian area: absent
Humid submediterranean belt: very rare
Humid mediterranean belt: very rare
Dry mediterranean belt: very rare
Predictive model
Herbarium samples
Source: http://fungi.myspecies.info/all-fungi/scytinium-turgidum - CC BY-SA NC
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Rocky Mountains, Bullmoose Mountain, near Tumbler Ridge Date: 2014-06-07 Terricolous on cliff ledge, subalpine
Harrie Sipman – Source http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis
Growth form: Crustose
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
On otherwise dry surfaces with short periods of water seepage after rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: very rare
Padanian area: absent
Humid submediterranean belt: very rare
Humid mediterranean belt: very rare
Dry mediterranean belt: very rare
Predictive model
| Herbarium samples |
Index Fungorum
GBIF
Source: http://fungi.myspecies.info/all-fungi/scytinium-turgidum - CC BY-SA NC
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Rocky Mountains, Bullmoose Mountain, near Tumbler Ridge Date: 2014-06-07 Terricolous on cliff ledge, subalpine
