Enchylium polycarpon (Hoffm.) Otálora, P.M. Jørg. & Wedin subsp. corcyrense (Arnold)

Provisionally placed here, ICN Art. 36.1b.. Basionym: Lathagrium orbiculare var. corcyrense Arnold - Flora, 70: 152, 1887.
Synonyms: Collema polycarpon Hoffm. subsp. corcyrense (Arnold) Pišút; Collema polycarpon var. corcyrense (Arnold) Degel.; Collema ragusanum Zahlbr.; Collema salevense (Müll. Arg.) Zahlbr.; Collema stygium var. stygioides Flagey; Lathagrium akralense Flagey; Lathagrium flaccidulum; Lathagrium salevense; Synechoblastus salevensis
Distribution: N - VG (TSB 6529), Lomb, Piem, Lig. C - Laz (Nimis & Tretiach 2004), Sar. S - Camp (Nimis & Tretiach 2004), Pugl, Si (Nimis & al. 1994).
Description: Thallus foliose, homoiomerous, gelatinous when wet, forming 3(-5) cm wide rosettes, deeply lobed. Lobes radiating, elongated, 2-6 mm wide, 0.4-0.5(-0.6) mm thick (when wet), contiguous, adpressed for most of their length, ascending towards the center, often channeled towards apices, the tips much swollen and plicate. Upper surface dark brown, dull, sometimes with globose isidia. Lower surface usually paler, with tufts of white hapters. Apothecia often present, but less abundant than in the typical subspecies, mainly marginal, sessile to stipitate, 1-3 mm wide, with a plane to slightly convex, red-brown disc and a rather thin thalline margin. Proper exciple rather thin, subpara- to small-celled (up to 8.5 µm) euparaplectenchymatous; hymenium hyaline, 65-106 µm tall. Asci 8-spored, subcylindrical to narrowly clavate, the apex thick, with a I+ blue apical dome and a I+ blue annulus projecting downwardly. Ascospores 3-septate, hyaline, broadly fusiform, pointed at at least one end, (18-)20-26(-28) x (5-)6-9(-10) µm, Pycnidia laminal or marginal, immersed in warts, globose, pale. Conidia straight or slightly curved, bacilliform, usually with swollen ends, 5-7 x 1-1.5 µm. Photobiont cyanobacterial (Nostoc), in long chains. Spot tests: all negative. Chemistry: without lichen substances.
Note: more thermophytic and more southern than the typical subspecies, this taxon is worthy of further study.
Growth form: Foliose, broad lobed
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: extremely rare
Submediterranean belt: rare
Padanian area: very rare
Humid submediterranean belt: rather rare
Humid mediterranean belt: rather rare
Dry mediterranean belt: rare


pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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P.L. Nimis CC BY-SA 4.0
TSB 6529



Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017