Lathraeodiscus arcticus

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Lathraeodiscus arcticus Dissing & Sivertsen, Mycologia, 80 (6): 833 (1989).

 

Basionym Lathraeodiscus arcticus Dissing & Sivertsen, Mycologia, 80 (6): 833 (1989).

Diagnosis Carposomata 0.5-3 mm lata, hemisphaerica, basi lata in solum profunde immersa. Discus pallide castaneus vel purpureo-spadiceus; margo conspicuus, elevatus, irregulariter dentatus, purpureo-castaneus; superficies exterior glabra vel furfuracea, purpureo-castanea vel fusco-vinacea. Excipulum exterius 10-20 µm crassum, e hyphis formatum capilliformibus adnatis, intertextis, 3-6 µm crassis, contento cinereo-violaceo. Excipulum medullare 100-165 µm crassum, e cellulis formatum infra globularibus vel angulatis, 6-15 µm diam, parietibus crassis, ad marginem versus sensim claviformibus. Subhymenium 50-80 µm crassum, e cellulis formatum dense intertextis, protoplasmate copiosis, uncos formantibus. Hymenium 220-260 µm altum. Asci cylindrici, operculati, 15.5-17 µm crassi, in bases pleurorhynchas longe attenuati, contento pallide vinaceo-cinereo. Paraphyses rectae, sursum sensim ad 6-10 µm incrassatae, contento homogeneo vel granulari, imprimis in summis cellulis vinaceo-cinereo. Sporae uniseriatae, 15.2-17.6-18.5 × 12.5-13.6-14.6 µm magnae, late ellipsoides vel paene subglobulares, colore nullo, guttas singulas magnas, globulares, eccentricas foventes, verrucis humilibus, rotundatis, cyanophilis, inter se bene separatis ornatae.
Holotypus die 3 Augusti anni 1985 inter Poam arcticam, Dupontiam psilosantham, Alopecurum alpinum, Distichium sp., Polytrichum alpinum, Scapaniam sp., Lamprospora spp. in solo arenoso prope flumen Endalselva vallis Adventdalen ab oppido Longyearbyen lat. bor. 78°12'', long. or. 15°50'' 5 km inter meridiem et orientem distantis insulae Spitsbergen archipelagi Svalbard sub numero S 85.67 ab auctoribus lectus, siccus in Museo Botanico Hauniensi depositus.

Type S 85.67 (C) - holotypus

MycoBank 134290

 

Literature
Dissing H., Sivertsen S. 1989. Lathraeodiscus arcticus gen. nov., sp. nov. (order Pezizales), a new discomycete from North Greenland and Svalbard. Mycologia, 80 (6): 832-836.

Classification: Pyronemataceae, Lathraeodiscus


Created on 30/05/2015.

Updated on 02/08/2023.

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