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Pluteus Ludwigii Fungal Planet Description Sheets 455 454 Persoonia – Volume 42, 2019 Pluteus ludwigii Fungal Planet description sheets 455 Fungal Planet 943 – 19 July 2019 Pluteus ludwigii Ferisin, Justo & Dovana, sp. nov. Etymology. Named in honour of the famous German mycologist Erhard Vellinga (1990)). Pluteus eludens recently reported from Por- Ludwig. tugal, Russia and USA, is distinguished by a pileus margin Classification — Pluteaceae, Agaricales, Agaricomycetes. rugose-venose or translucently striate, longer spores (6–8.2 × 5.2–7.3 µm), different pileipellis with variable terminal elements Basidiomata medium-sized, agaricoid. Pileus 20–30 mm, hemi- in shape, darkly pigmented cheilocystidia and cylindrical or la- spherical at first, then plano-concave to concave, with straight geniform caulocystidia (Justo et al. 2011). Pluteus phlebophorus margin sometimes reflexed, not hygrophanous, dark brown at differs in larger spore size ((5.5–)7–8(–9.5) × (4.5–)5–7 µm) centre, pallescent towards margin to light brown, surface gla- and larger terminal elements of the pileipellis (Vellinga 1990). brous, weakly to strongly venous at centre, surface occasionally Pluteus nanus differs mainly in a non-venous pileus centre and cracked demonstrating whitish context underneath. Lamellae larger spores (6.5–)7–9.5(–10) × 5.5–7 µm (Vellinga 1990). moderately crowded, free, slightly ventricose, up to 4 mm The two collections of P. ludwigii clustered in a strongly sup- broad, first whitish later pink with flocculose edge. Stipe 30–45 ported clade (maximum likelihood bootstrap support value × 2–4 mm, cylindrical, bulbous, pubescent, white all over, (MLB) = 98 %) which is sister (with no support) to a collection sometimes grey at the base. Context white. Smell and taste from Korea incorrectly determined as P. podospileus (GenBank not distinctive. Basidia 21–26 × 8–10 µm, clavate, 4-spored. KR673523) and are placed within the /cinereofuscus clade Basidiospores (5.3–)5.8–6.6(–6.9) × (4.9–)5.2–5.7(–6) µm, (MLB = 95 %). Compared to P. ludwigii, P. podospileus has a Q = (1.02–)1.09–1.21(–1.29), subglobose to broadly ellipsoid, subtomentose to squamulose at centre pileus, larger spores thick-walled, non-amyloid, cyanophilous. Cheilocystidia 50–77 5.5–7.5(–8) × (4–)4.5–6 µm and presence of narrowly conical × 19–25 µm, abundant, thin-walled, hyaline, variable in shape, to fusiform elements in the pileipellis, (20–)36–120(–200) × fusiform, narrowly utriform, subcapitate to clavate, so numerous (11–)15–35(–40) µm (Vellinga 1990). as to make the lamellar edge sterile. Pleurocystidia 70–90 × 22–32 µm, thin-walled, hyaline; shape variable from fusiform to clavate. Pileipellis a hymeniderm made up of broadly clavate 98 Pluteus ludwigii MCVE30136, holotype Italy or sphaeropedunculate elements, some mucronate, 33–51 Pluteus ludwigii MCVE30137 Italy × 20–30 µm, pigment intracellular (vacuolar), light brown or Pluteus podospileus KA121285 South Korea KR673523 brown. Stipitipellis a cutis of light brown, 4–10 µm wide hyphae. 99 Pluteus eludens MA50497 Madeira Island HM562118 Caulocystidia present only in apical part of the stipe, clavate. Pluteus eludens SF15 USA (Illinois) HM562185 Pluteus cinereofuscus Clamp connections absent in all tissues. 99 AJ229 Portugal HM562108 Habitat & Distribution — Solitary, on twigs of broadleaved Pluteus cinereofuscus AJ324 Spain HM562124 trees. So far only known from the type locality. 99 Pluteus nanus UC1859494 USA (California) KF306029 Pluteus nanus BRNM761723 Czech Rep. LN866290 LOVENIA Pluteus sapiicola SP394387 Brazil HM562146 cinereofuscus Typus. S , Nova Goricȃ, Panoveĉ Park, on twigs of broadleaved / trees, in wet shady places, 9 Sept. 2018, G. Ferisin (holotype MCVE30136, Pluteus rimosoaffinis SP416740 Brazil KM983706 ITS and LSU sequences GenBank MK834525 and MK834527, MycoBank Pluteus cf jamaicensis SP393705 Brazil FJ816662 MB830750). 95 Pluteus extremiorientalis LE262871 Russia KM658279 Additional material examined. SLOVENIA, Nova Goricȃ, Panoveĉ Park, on Pluteus multiformis AC4249 Spain HM562201 twigs of broadleaved trees, in wet shady places, 12 May 2018, G. Ferisin, Pluteus nanus UC1861232 USA (California) KC147678 MCVE30137, ITS sequence GenBank MK834526. 100 Pluteus romellii LE303660 Russia KX216326 Notes — Terminology for descriptive terms is according to Pluteus aurantiorugosus TO-AVPP212 Italy HQ654908 Vellinga (1988). Maximum-likelihood analysis of the ITS region Pluteus cubensis SP394389 Brazil HM562161 Pluteus brunneosquamulosus was performed with RAxML v. 8.2.1 (Stamatakis 2014) using the K12794 India JN603204 Pluteus fenzlii Slovakia HM562111 GTR+G model as implemented in Geneious v. 11.1.4. Pluteus 100 94 Pluteus mammillatus USA (Florida) HM562120 ludwigii is characterised by its small-sized basidiomata with a 98 Pluteus ephebeus «group» Virgin Islands AJ478 KM983675 brown and venous centre pileus, small ((5.3–)5.8–6.6(–6.9) × Pluteus tomentosulus MO163564 USA (Pennsylvania) KM983673 (4.9–)5.2–5.7(–6) µm), subglobose to broadly ellipsoid basi- Pluteus seticeps Illinois HM562199 diospores, hymeniderm with clavate or sphaeropedunculate 83 72 Pluteus podospileus AJ782 USA (Massachusetts) KM983687 elements and cheilocystidia variable in shape. Morphologically, Pluteus necopinatus FK1701 Brazil KM983693 P. ludwigii is close to P. cinereofuscus, P. eludens, P. phlebopho­ 71 Pluteus karstedtiae FK637 Brazil KM983683 rus and P. nanus. Pluteus cinereofuscus can be distinguished Pluteus hispidulus A1882 Spain KM983681 from P. ludwigii by a hygrophanous pileus with olivaceous tinges Pluteus chrysophlebius LE 303664 Russia KX216312 and larger spore size ((6.5–)7–9(–10.5) × (5–)5.5–7(–7.5) µm; Pluteus thomsonii 603 Italy JF908607 Pluteus diettrichii GM2581 Spain KM983714 100 Pluteus petasatus AJ201 Spain HM562038 Pluteus cervinus AJ82 Spain HM562035 0.03 Colour illustrations. Panoveĉ Park, Nova Goricȃ, Slovenia. Pluteus ludwigii The ITS phylogenetic tree was inferred using the Maximum likelihood (ML) basidiomata in habitat; basidiospores; pileipellis elements; pleurocystidia and method based on the GTR+G model in RAxML v. 8.2.1. Only bootstrap values cheilocystidia. Scale bars = 10 µm. The ITS phylogenetic≥ 70 % aretree was indicatedinferred using onthe the Maximum nodes likelihood (1 000(ML) methodbootstraps).based on the GTR+G model in RAxML v.8.2.1. Only ML bootstrap values ≥ 70 % are indicated on the nodes (1 000 bootstraps). Francesco Dovana & Alfredo Vizzini, Department of Life Sciences and Systems Biology, University of Turin, Viale P.A. Mattioli 25, 10125, Torino, Italy; e-mail: [email protected] & [email protected] Giuliano Ferisin, Via A. Vespucci 7, 1537, 33052 Cervignano del Friuli (UD), Italy; e-mail: [email protected] Alfredo Justo, Department of Biology, Clark University, 950 Main St, Worcester, 01610, MA, USA; e-mail: [email protected] © 2019 Naturalis Biodiversity Center & Westerdijk Fungal Biodiversity Institute.
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