Inocybe hebes Eyssart. & Buyck 2022, sp. nov.
Creators: name: Buyck, Bart
name: Eyssartier, Guillaume
name: Armada, François
name: Corrales, Adriana
name: Hembrom, Manoj Emanuel
name: Rossi, Walter
name: Bellanger, Jean-Michel
name: Das, Kanad
name: Dima, Bálint
name: Ghosh, Aniket
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Agaricales
Inocybaceae
Inocybe
Inocybe hebes

description: 114. Inocybe hebes Eyssart. & Buyck, sp. nov.
(Figs 7; 8)
DIAGNOSIS. — Resembles Inosperma curvipes, but differs from it in its association with trees from the African miombo woodland, its more vivid brown colours, non spermatic smell, and lageniform often subcapitate cystidia.
HOLOTYPE. — Zambia. Near Lusaka, gregarious in miombo woodland, 10.II.1996, Eyssartier 96110, (holo-, P[PC0088772]).
INDEX FUNGORUM. — IF558792.
GENBANK. — JN974997 (LSU).
ETYMOLOGY. — Named after the general form of the cap, from the latin adjective hebes, “blunt, obtuse”.
DESCRIPTION
Pileus
Measuring12-20(25) mm in diam., obtuse conico-campanulate then plano-convex to plane, ochraceous-blond, ochraceous beige to dull brown, sometimes darker at the top, fibrillose to coarsely fibrillose, sometimes with erected squamules around the centre.
Lamellae
Subhorizontal, not very close to quite distant, (1.5)2-3(4) mm broad, emarginate, pale beige then ochraceous brown, with very slightly pruinose edges.
Stipe
20-35(40) × 2-3 mm, slightly broadened at the base up to 5-7 mm, seldom cylindrical but never bulbous, pale beige sometimes with pinkish tinges at the tip, then brownish to dirty brown in the older stages, not pruinose or very finely just under the lamellae.
Flesh
Pale,sometimes with pinkish tinges in- the upper part of the stipe.
Odor
Particular, of fresh bread or brioche, sometimes honey-like.
Taste
Mild.
Spores
Nodulose, with 5-6(7) obtuse swellings, (7)8-9(10) × (5.5) 6-7(7.5) µm.
Paracystidia
Clavate, small, 15-25 × 8-10 µm.
Cheilocystidia
Lageniform often subcapitate, without or with few crystals, (40)45-55(60) × (10)13-15(18)µm, with thickened walls up to 2-3 µm, hyaline in 10% ammonia.
Pleurocystidia
Cheilocystidia-like, but slightly bigger, up to 75(90)µm long.
Pileipellis
A cutis of relatively broad hyphae, (5)8-12(15) µm. Pigment incrusting.
Clamp-connections
Present in all parts.
NOTES
The LSU sequence of our species was part of phylogenetic analyses presented in Ryberg & Matheny (2012) but its systematic position was not discussed. As far as we are aware, it is not mentioned in any other publication so far. nBLAST of this sequence does not suggest high similarities with other African species, although the most similar sequence (96.7% for 99 % coverage) is obtained from another Inocybe from African miombo woodlands: our still unpublished I. subfuscescentipes nom. prov. Inocybe curvipes P. Karst., a species described from Finland but now widely distributed throughout the world (Bougher & Matheny 2011), resembles it in a number of ways, notably in its browning stipe and spore shape, but has more vivid brown colours, spermatic smell, cylindrical or slightly swollen stipe and larger cystidia, broadly fusiform and noticeably tapered towards the apex; in addition, Inocybe curvipes associates with introduced Quercus or Pinus radiata, and also possibly Salix.
description: Published as part of Buyck, Bart, Eyssartier, Guillaume, Armada, François, Corrales, Adriana, Hembrom, Manoj Emanuel, Rossi, Walter, Bellanger, Jean-Michel, Das, Kanad, Dima, Bálint & Ghosh, Aniket, 2022, Fungal biodiversity profiles 111 - 120, pp. 23-61 in Cryptogamie, Mycologie 20 (2) on pages 32-34, DOI: 10.5252/cryptogamie-mycologie2022v43a2, http://zenodo.org/record/7828891