Inosperma boeticum Eyssart. & Buyck, 2021

Buyck, Bart, Eyssartier, Guillaume, Dima, Bálint, Consiglio, Giovanni, Noordeloos, Machiel Evert, Papp, Viktor, Bera, Ishika, Ghosh, Aniket, Rossi, Walter, Leonardi, Marco & Das, Kanad, 2021, Fungal Biodiversity Profiles 101 - 110, Cryptogamie, Mycologie 20 (5), pp. 63-89 : 73-74

publication ID	https://doi.org/ 10.5252/cryptogamie-mycologie2021v42a5
persistent identifier	https://treatment.plazi.org/id/03C88795-FFF8-FFAE-FF11-FA010CDB8341
treatment provided by	Felipe
scientific name	Inosperma boeticum Eyssart. & Buyck
status

Treatment

105. Inosperma boeticum Eyssart. & Buyck View in CoL , sp. nov.

( Figs 8 View FIG ; 9 View FIG )

DIAGNOSIS. —Differs from Inosperma bulbomarginatum in its darker pileus color and wider spores, a <98% similarity for 100% coverage in the ITS sequence data, and in its association with different host tree species in a biogeographically distinct region (the miombo of South Central Africa).

HOLOTYPE. — Zambia. Copperbelt province, along Luanshyalbenga road, in degraded miombo woodland, 03.II.1996, EG 96.082 ( PC [ PC0088774 ]!, holo-)

INDEX FUNGORUM. — IF558210.

GENBANK. — JQ801412 (nrITS, holotype), JN975027 (nrLSU, holotype).

ETYMOLOGY. — Named after the colour of the cap, from the latin word boeticus, “Spanish brown”, a dark reddish brown.

ADDITIONAL SPECIMENS EXAMINED. — Zambia. Lusaka province, near Lusaka airport, in degraded miombo woodland, under Brachystegia

sp. and Uapaca nitida , 08.II.1996, GE96.082bis (PC[PC0125161]); ibid, 10.II.1996, EG 96.082ter (PC[PC0125162])

DESCRIPTION

Pileus

(10) 15-30 (35) mm in diam., subhemispherical or conicoconvex then planoconvex with a large obtuse umbo, more rarely plane, buffy-brown, chestnut brown sometimes reddish brown, never dark, beige brownish towards the margin, with lanate appressed squamules, felty, more fibrillose towards the margin.

Lamellae

Soon horizontal, (1.5) 2-3 mm broad, emarginate, beige greyish then ochraceous, never dark; edge white, finely flocculose.

Stipe

(20) 25-40 × 3-5 (6) mm, slightly bulbous but not marginate, whitish or pale beige, a little bit plushy in the upper part. fibrillose lengthwise.

Context

White.

Taste

Mild.

Smell

Unremarkable to distinctly farinaceous.

Spores

(8) 9-10 (11) × (5) 6-6.5 µm, ellipsoid to broadly amygdaliform, often slightly reniform.

Basidia

Clavate, 4-spored, (25) 30-35 × (6) 8-10 µm.

Marginal cells

Clavate to spheropedonculate, with 1-3 short elements at the base, variable in size, (15) 20-40 (50) × (8) 10-15 (20) µm.

Pileipellis

Acutis of cylindrical hyphae, (7) 8-10 (12) µm broad, with many free extremities. Pigment parietal, brown yellowish, more or less coarsely incrusting.

Clamp connections

Present in all parts.

NOTES

The ITS and LSU holotype sequence for this species were part of phylogenetic analyses by Kropp et al. (2013) and

Ryberg & Matheny (2012), and more recently also in those by Aignon et al. (2021a, b) who included our Zambian collection in their concept of I. bulbomarginatum sensu lato. In our opinion, as well as in the opinion of these authors, the combination of molecular and morphological differences justifies the recognition of two sister species confined to different habitats in different biogeographic parts of tropical Africa, as equally demonstrated for other ectomycorrhizal genera such as Russula ( Sanon et al. 2014) and Cantharellus , a genus that has mostly strict endemics in West Africa ( Buyck et al. 2020).