Identification Key to Pseudolagarobasidium species

1a. Basidiomes cream colored to light brown ..........................................................................................................................................2

1b. Basidiomes yellow to brown, grayish or vinaceous ..........................................................................................................................4

2a. Basidiospores 4–5.5 × 3–3.7 μm, microbinding hyphae present ........................................................................................ P. pronum

2b. Basidiospores slightly larger, microbinding hyphae absent ...............................................................................................................3

3a. Basidiomes chalky and brittle, basidiospores 5–5.8 × 3.5–4.4 μm, teeth ≤ 2 per mm, European species .................... P. conspicuum

3b. Basidiomes subceraceous, basidiospores 4.8–6.1 × 3.4–4.1 μm, teeth 2–4 per mm, Neotropical species .......................... P. pallens

4a. Basidiomes yellow to brownish orange, teeth with knobs ................................................................................................ P. venustum

4b. Basidiomes in shades of brown, gray or vinaceous, teeth smooth to slightly granulose ..................................................................5

5a. Hymenophore warty to odontioid, teeth up to 1 mm long ............................................................................................................... 6

5b. Hymenophore hydnoid, teeth generally ≥ 1 mm ............................................................................................................................... 7

6a. Basidiomes grayish, teeth up to 0.4 mm long .................................................................................................................. P. belizense

6b. Basidiomes brownish, teeth longer, up to 1 mm .............................................................................................................. P. modestum

7a. Basidiospores 3.4–4.3(−4.7) × 2.9–3.2(−3.6) μm .............................................................................................................. P. pusillum

7b. Basidiospores larger ...........................................................................................................................................................................8

8a. Teeth up to 1.8 mm long, basidiomes olive in KOH .............................................................................................. P. baiyunshanense

8b. Teeth longer, basidiomes unchanged in KOH ....................................................................................................................................9

9a. Basidiomes vinaceous when fresh, teeth up to 3.5 mm long, basidiospores 5–6(−6.5) × (3–)3.5–4(−4.5) μm............ P. subvinosum

9b. Basidiomes wood brown, teeth up to 2.5 mm long, basidiospores (4.3–)4.8–5.8(−6.5) × (2.9–)3.2–4(−4.3) μm.......... P. acaciicola