Sunday, May 2, 2021

[Fungi • 2020] Inocybe woglindeana (Agaricales: Inocybaceae) • A New Species of the Genus Inocybe, thriving in Exposed Habitats with Calcareous Sandy Soil

Inocybe woglindeana Bandini, Vauras & Weholt

in Bandini, Vauras, Weholt, Oertel & Eberhardt, 2020. 

 We describe a smooth-spored species of Inocybe, the basidiomes of which have been encountered growing with Salix in exposed habitats, often with calcareous sandy soils in Germany and Fennoscandia. The species is presented with a detailed description, photographs and microdrawings. Its relationship to similar taxa growing in the same environments is illustrated with ITS and LSU data. Morphologically the species would be keyed out as a member of I. sect. Tardae. For comparison, the types of somewhat similar species occurring in similar habitats as I. woglindeana, i.e. I. subpelargonium, I. rufuloides, I. inodora, I. neorufula and I. variispora, were examined morphologically; from the latter ITS and mtSSU V6 data were obtained. Molecular data supported a very close relationship between I. woglindeana and I. variispora. The two species are also morphologically similar, but differ in colour of pileus, in shape and details of hymenial cystidia, and also in their host and habitat. None of the other species, represented by our own collections or sequences from the public domain, are phylogenetically closely related to I. woglindeana.

Key words: Agaricales, Inocybaceae, Inocybe, Taxonomy, Type studies, Europe, Molecular systematics, ITS, LSU

Inocybe woglindeana Bandini, Vauras & Weholt
a: coll. DB12-5-13-2, Holotype, scale bar: 1 cm. b: coll. DB25-5- 13-1, scale bar: 1 cm. c: Cheilocystidia (coll. DB25-5-13-1), scale bar: 10 µm. d: Microscopic characters (coll. DB12-5-13-2), Ca = Caulocystidia, Cpa = Cauloparacystidia, Ch = Cheilocystidia, Pa = Paracystidia, Pl = Pleurocystidia, Sp = Spores;
scale bar spores: 10 µm, scale bar cystidia: 50 µm. e: Spores (coll. DB25-5-13-1), scale bar: 10 µm; photographs and drawing D. Bandini.

Inocybe woglindeana Bandini, Vauras & Weholt sp. nov.

DIAGNOSIS: Most basidiomes fairly small with ochraceous to ochraceous brownish felty-lanose pileus, when young usually with ample whitish velipellis and cortina, a stipe that is sparsely pruinose only at the extreme apex, spores that on average are longer than 10 µm, hymenial cystidia that are mostly ventricose with rather thin walls and often with a truncate or roundish base. It grows on exposed locations, mostly with Salix and also Populus nearby. The most similar species morphologically as well as molecularly is I. variispora. From this and other species it differs by the above-named combined characteristics and by ITS sequence data.

ETYMOLOGY: woglindeana”, after Woglinde the Rhinemaiden in the “Ring der Nibelungen” of Richard Wagner, because the holotype of the species was collected on the border of a lake next to the river Rhine. 

Ditte Bandini, Jukka Vauras, Øyvind Weholt, Bernd Oertel and Ursula Eberhardt. 2020. Inocybe woglindeana, A New Species of the Genus Inocybe, thriving in Exposed Habitats with Calcareous Sandy Soil. Karstenia. 58 (1); 41-59. DOI: 10.29203/ka.2020.488