Taxonomy and phylogenetic analysis reveal one new genus and three new species in Inonotus s. l. (Hymenochaetaceae) from Brazil Author X, Vitor Author Lima, avier de Author T, Virton Rodrigo Author Oliveira, argino de Author C, Nelson Author Lima-Júnior, orreia de Author C., José Ribamar Departamento de Micologia, Centro de Biociências, Universidade Av. da Engenharia s / n, Recife, Pernambuco Author Oliveira-Filho Federal de Pernambuco, 50740 - 570 (Brazil) Author Santos, Carla Author Lima, Nelson CEB-Centre of Biological Engineering, Micoteca da Universidade do Minho (MUM), University of Minho, Braga (Portugal) Author Gibertoni, Tatiana Baptista Departamento de Micologia, Centro de Biociências, Universidade Federal de Pernambuco, Av. da Engenharia s / n, Recife, Pernambuco 50740 - 570 (Brazil) text Cryptogamie, Mycologie 2022 2022-01-21 20 1 1 21 journal article 255186 10.5252/cryptogamie-mycologie2022v43a1 402fdfbb-d515-491a-923b-eb2726c3722a 1776-100X 7828806 KEY TO INONOTUS S.L. 1. Hyphal system monomitic throughout; setal hyphae present or absent................................... Inonotus P.Karst. — Hyphal system dimitic in the tube; setal hyphae absent ................................................................................. 2 2. Context and tube trama dimitic; hymenial setae strongly ventricose and dark; dark line present, soon exposed as a dark crust ............................................................................................ Sclerotus Xavier de Lima , gen. nov. — Context mono-dimitic; tube trama dimitic; dark line in the context present or absent, if present, bellow the mat/tomentum; hymeniael setae variable, rarely absent ....................................... Sanghuangporus / Tropicoporus KEY TO INONOTUS IN BRAZIL 1. Any kind of setae absent.............................................................................................................................. 2 — Setae present in hymenium or/and in tube trama ........................................................................................ 8 2. Resupinate species ....................................................................................................................................... 3 — Pileate species .............................................................................................................................................. 4 3. Pores 3-4/mm ........................................................................................................... I. venezuelicus Ryvarden — Pores 7-8/mm ........................................................................................................... I. costaricensis Ryvarden 4. Pores 7-8/mm ........................................................................................ I. luteoumbrinus (Romell) Ryvarden — Pores 1-6/mm ............................................................................................................................................. 5 5. Pores irregular, 1-3/mm................................................................................. I. dentatus Decock & Ryvarden — Pores regular, round to angular.................................................................................................................... 6 6. Basidiospores 7-8 x 6-7 Μm ........................................................................................ I. neotropicus Ryvarden — Basidiospores up to 6 Μm in longest dimension ........................................................................................... 7 7. Pore surface yellow to rusty brown; basidiospores hyaline to pale yellow........ I. splitgerberi (Mont.) Ryvarden — Pore surface dull purplish brown; basidiospores rusty brown ............................................. I. porrectus Murrill 8. Tramal setae present; hymenial absent or present......................................................................................... 9 — Tramal setae absent; hymenial present ....................................................................................................... 19 9. Hymenial setae absent ............................................................................................................................... 10 — Hymenial setae present.............................................................................................................................. 13 10. Pores 3-4/mm .................................................................................................. I. patouillardii (Rick) Imazeki — Pores 7-10/mm ......................................................................................................................................... 11 11. Tramal setae 6-8 Μm wide......................... I. parvisetus V.R.T. Oliveira, Xavier de Lima & Gibertoni , sp. nov. — Tramal setae wider, up to 35 Μm................................................................................................................ 12 12. Basidioma applanate to slightly convex, brown...................................... I. amazonicus Gibertoni & Ryvarden — Basidioma trequitreous, yellowish................................................... I. brasiliensis Xavier de Lima & Ryvarden 13. Pileate species ............................................................................................................................................ 14 — Resupinate species ..................................................................................................................................... 17 14. Tramal setae branched ........................................................................................ I. cuticularis (Bull.) P. Karst. — Tramal setae unbranched ........................................................................................................................... 15 15. Pores 8-10/mm ........................................................................ I. portoricensis (Overh.) Baltazar & Gibertoni — Pores 2-6/mm ........................................................................................................................................... 16 16. Pores 2-3/mm; basidiospores 6-8.5 Μm long...................................................................... I. rickii (Pat.) Reid — Pores 4-6/mm; basidiospores 5-6 Μm long......................................................... I. pseudoglomeratus Ryvarden 17. Basidiospores 7-8 Μm long .............................................................................................. I. adnatus Ryvarden — Basidiospores 8.5-13 Μm long ................................................................................................................... 18 18. Basidiospores 8.5-11.5 Μm long, hymenial setae 33-45 Μm long ............. I. multisetifer Abrahão & Gugliotta — Basidiospores 10-13 Μm long, hymenial setae 20-32 Μm long ................... I. micantissimus (Rick) Rajchemb. 19. Hymenial setae hooked ............................................................................................................................. 20 — Hymenial setae straight ............................................................................................................................. 21 20. Pileus surface strigose; setae 30-55 Μm long.................................................................. I. fulvomelleus Murrill — Pileus surface tomentose to glabrous; setae 14-35 Μm long ............................... I. radiatus (Sowerby) P. Karst. 21. Pileus surface adpressed velutinate; pore surface rusty brown....................... I. pseudoradiatus (Pat.) Ryvarden — Pileus surface scrupose; pore surface yellow .............................................................. I. xanthoporus Ryvarden