Amauroderma, Murrill, 1905

Gomes-Silva, Allyne C., De Lima-Júnior, Nelson C., Malosso, Elaine, Ryvarden, Leif & Gibertoni, Tatiana B., 2015, Delimitation of taxa in Amauroderma (Ganodermataceae, Polyporales) based in morphology and molecular phylogeny of Brazilian specimens, Phytotaxa 227 (3), pp. 201-228 : 223-224

Key to the species of Amauroderma in Brazil updated from Campacci & Gugliotta (2009)

1. Basidiomata sessile to sub-, laterally stipitate .................................................................................................................................. 2

- Basidiomata distinctly stipitate ......................................................................................................................................................... 3

2. Basidioma sessile, abhymenial surface azonate, black at the base, pores angular, dissepiment lacerate, basidiospores globose to subglobose, 11–14 × 10–13 μm ........................................................................................................................................... A. sessile

- Basidiomata substipitate, abhymenial surface strongly zonate, red at the base, pores circular, dissepiment entire, basidiospores globose, 8–10 μm diam. ................................................................................................................................................ A. subsessile

3. Basidiomata with laccate stipe and/or pileus .................................................................................................................................... 4

- Basidiomata without laccate stipe and/or pileus .............................................................................................................................. 6

4. Basidiomata with laccate stipe and pileus, pores 3–4/mm, context homogeneous .......................................................... A. renidens

- Basidiomata with laccate stipe, pores 5–8/mm, context with two black lines ................................................................................. 5

5. Pores 7–8/mm, basidiospores 8–10 × 7–8 μm ................................................................................................... A. laccatostipitatum

- Pores 5–6/mm, basidiospores 9–11 × 7–8 μm .................................................................................................................... A. picipes

6. Basidiomata with whitish stipe ............................................................................................................................... A. albostipitatum

- Basidiomata with stipe of different colour ....................................................................................................................................... 7

7. Pores 1–3/mm ................................................................................................................................................................................... 8

- Pores 4–8/mm ................................................................................................................................................................................. 13

8. Abhymenial surface with glabrous and velutinate to tomentose zones ............................................................... A. trichodermatum

- Abhymenial surface glabrous to finely velutinate ............................................................................................................................ 9

9. Basidiomata short-stipitate, funnel-shaped to fan-shaped or applanate, generative hyphae 6–30 μm diam. with conspicuous clamp connections, basidiospores 7–9 μm .............................................................................................................................. A. brasiliense

- Basidiomata long-stipitate, generative hyphae 2–3 μm diam., basidiospores 9–16 μm long ........................................................ 10

10. Basidiomata thin, hard .................................................................................................................................................................... 11

- Basidiomata thick, spongy .............................................................................................................................................................. 12

11. Pileus vinaceous brown to brown, basidiospores oblong-ellipsoid, 10–13 × 7–9.5 (–10) μm ........................................ A. partitum

- Pileus dark brown to black, basidiospores subglobose, 9–11 × 7–9 μm ................................................................... A. intermedium

12. Basidiospores globose to subglobose, distinctly ornamented, 13–16 × 12–15 μm, hyphal pegs absent .................. A. aurantiacum

- Basidiospores ellipsoid, finely ornamented, (12–) 13–15 × 9–12 μm, hyphal pegs absent or present ....................... A. calcigenum

13. Pores 7–8/mm, context without black lines .................................................................................................................................... 14

- Pores 2–7/mm, context with or without black lines ....................................................................................................................... 15

14. Basidiospores smooth, IKI-, globose, 6.5–7 μm diam. ............................................................................................. A. coltricioides

- Basidiospores ornamented, IKI+, globose to subglobose, 15–17 × 13–15 μm ............................................................ A. unilaterum

15. Context with black lines ................................................................................................................................................................. 16

- Context without black lines ............................................................................................................................................................ 21

16. Basidiospores ovoid, 13–16 × 9–10 μm ....................................................................................................................... A. ovisporum

- Basidiospores globose to subglobose, up to 13 μm lengh or diam. ................................................................................................ 17

17. Basidiomata soft, velutinate, context white to cream ................................................................................................... A. boleticeum

- Basidiomata hard, glabrous, context yellow to brown .................................................................................................................... 18

18. Context yellowish, basidiospores globose to subglobose, 10–13 × 9–12 μm ............................................................ A. omphalodes

- Context brown, basidiospores globose to subglobose, 7–12 μm lengh or diam. ........................................................................... 19

19. Pores 2–4/mm, basidiospores subglobose, 9–11 × 7–9 μm ....................................................................................... A. intermedium

- Pores 4–6/mm ................................................................................................................................................................................. 20

20. Basidiospores globose to subglobose, 9–12 × 9–11 μm ........................................................................................... A. praetervisum

- Basidiospores globose, 7–9 (–10) μm diam. ............................................................................................................ A. schomburgkii

21. Basidiospores ovoid, 13–16 × 9–10 μm ....................................................................................................................... A. ovisporum

- Basidiospores globose, subglobose, oblong-ellipsoid .................................................................................................................... 22

22. Pores 3–5/mm ................................................................................................................................................................................. 23

- Pores 5–7/mm ................................................................................................................................................................................. 24

23. Pores 4–5/mm, basidiospores oblong-ellipsoid, 10–12.5 × 6.25–7.5 μm ............................................................. A. oblongisporum

- Pores 3–5/mm, basidiospores globose to subglobose, 12–13 × 9–11 μm .............................................................. A. pseudoboletus

24. Basidiospores globose, up to 10 μm diam. ..................................................................................................................................... 25

- Basidiospores subglobose to oblong-ellipsoid, longer than 11 μm ................................................................................................ 27

25. Basidiomata with 2–9 lobes, originated from one stipe, basidiospores 9–10 μm diam. ............................................ A. floriformum

- Basidiomata entire .......................................................................................................................................................................... 26

26. Context brown, basidiospores 7–10 μm diam. ....................................................................................................................... A. exile

- Context white, basidiospores 8 –10 μm diam. ................................................................................................................... A. sprucei

27. Basidiomata 0.4–0.6 mm thick, abhymenial surface yellowish brown, context yellowish brown, basidiospores subglobose to ellipsoid, 11–13 (–14) × 9–12 μm .............................................................................................................................. A. camerarium

- Basidiomata 0.1–0.2 mm thick, abhymenial surface vinaceous brown, basidiospores oblong-ellipsoid, 12–15 (–16) × 8–10 μm ... ............................................................................................................................................................................... A. elegantissimum