Dentipellis

Wei, Chia-Ling, Chang, Chiung-Chih & Wu, Sheng-Hua, 2020, Dentipellis fimbriata sp. nov. (Russulales, Basidiomycota) from subtropical Taiwan, Phytotaxa 428 (2), pp. 131-138 : 137

Key to species of Dentipellis , Dentipellicula and Dentipellopsis

1. Cystidial organ absent or rarely present (including fusoid cystidoles) ..............................................................................................2

1. Cystidial organ present .......................................................................................................................................................................5

2. Cystidial organ rare, if present, then clavate to capitate; basidiospores (4–)4.5–5.5(–6) × (2.5)–3–4 μm. Known from Russia, on gymnosperm ........................................................................................................................................ Dentipellis parmastoi (Nikol.)

2. Cystidial organ absent. On angiosperm..............................................................................................................................................3

3. Fusoid cystidioles absent; basidiospores 4.3–5 × 3.2–3.6(–4) μm. Known from North America ....................................................... ................................................................................................................................................. Dentipellis ohiensis (Berk.) Nakasone

3. Fusoid cystidioles present...................................................................................................................................................................4

4. Basidiospores (4.8–)5–6(–6.2) × 3–3.6(–3.8) μm .................................................... Dentipellis longiuscula L.L. Shen & Min Wang

4. Basidiospores 2.4–2.9(–3) × (1.8–)2–2.2(–2.4) µm ............................................................................. Dentipellicula austroafricana

5. Gloeocystidia not tubular, up to 60 μm long; fusoid cystidiole present; basidiospores 3.5–4.1(–4.8) × (2.5–)2.6–3(–3.1) µm ......... ....................................................................................................................................................................... Dentipellis rhizomorpha

5. Gloeocystidia tubular, ususally> 100 μm long; other shaped cystidia may also present in hymenium............................................6

6. Tubular gloeocystidia dark blue in Melzer’s reagent; basidiospores (3.4–)3.5–4.5(–4.8) × 2.4–3.2(–3.5) μm. Known from Australia............................................................................................................................................................ Dentipellis tasmanica

6. Tubular gloeocystidia never dark blue in Melzer’s reagent ...............................................................................................................7

7. Basidiospores mostly <4 μm long .....................................................................................................................................................8

7. Basidiospores mostly> 4 μm long ...................................................................................................................................................12

8. Basidiospores mostly <3.2 μm long; dendrohyphidia present or absent...........................................................................................9

8. Basidiospores mostly> 3.2 μm long; dendrohyphidia abesent........................................................................................................10

9. Dendrohyphidia present; Aculei> 1 mm long. On gymnosperm..................................................... Dentipellis microspora Y.C. Dai

9. Dendrohyphidia absent; Aculei <1 mm long. On angiosperm .................................................................. Dentipellicula taiwaniana

10. Gloeocystidia apically rounded. On gymnosperm ........................................................................................ Dentipellis coniferarum

10. Gloeocystidia apically with papilla or occasionally moniliform; on angiosperm;...........................................................................11

11. Subicular hyphae colorless; aculei> 3 mm long............................................................................................ Dentipellicula leptodon

11. Subicular hyphae yellowish brown; aculei <3 mm long ................................................................................... Dentipellis fimbriata

12. Tubular gloeocystidia not moniliform toward apex; aculei <3 mm long. Tropical species ............................................................13

12. Tubular gloeocystidia moniliform toward apex; aculei> 3 mm. Temperate to subtropical species ................................................14

13. Basidiospores oblong ellipsoid, <5.5 μm long and <4 μm wide ............................... Dentipellis tropicalis L.L. Shen & Min Wang

13. Basidiospores broadly ellipsoid,> 5.5 μm long and> 4 μm wide........................................................... Dentipellopsis dacrydicola

14. Basidiospores> 5 μm long ..................................................................................................................................... Dentipellis fragilis

14. Basidiospores <5 μm long ..................................................................................... Dentipellis dissita (Berk. & Cooke) Maas Geest.