Cotylidia

Yang, Cheng, Xu, Yu-Yan & Fan, Li, 2021, Cotylidia fibrae (Rickenellaceae, Hymenochaetales), a new species from China, Phytotaxa 487 (2), pp. 139-148 : 146-147

Key to the species of Cotylidia

1. Basidiome growing on moss or wood ................................................................................................................................................2

1. Basidiome growing on soil.................................................................................................................................................................5

2. Basidiome growing on wood.......................................................................................................................................... C. marsicana

2. Basidiome growing on moss ..............................................................................................................................................................3

3. Basidiospores with two guttules........................................................................................................................................ C. guttulata

3. Basidiospores without guttules...........................................................................................................................................................4

4. Basidiome reniform or flabelliform to broadly spathulate; pileus pale alutaceous brown; stipe lateral; basidiospores small (3–3.75 × 1.2–2.5 μm..................................................................................................................................................................... C. carpatica

4. Basidiome infundibuliform; pileus buff to brownish, darker in the centre; stipe central to eccentric; basidiospores large (4–5 × 2–2.5 μm............................................................................................................................................................................ C. undulata

5. Basidiome not becoming confluent....................................................................................................................................................6

5. Basidiome with adjacent fruitbodies becoming confluent .................................................................................................................7

6. Basidiome papery, whitish to pale ochraceous, slightly zonate; pilocystidia and caulocystidia present; basidiospores lacrymoid to subcylindrical ................................................................................................................................................................. C. muscigena

6. Basidiome coriaceous, creamy to beige, without zonation; pilocystidia and caulocystidia absent; basidiospores reniform to oblong............................................................................................................................................................................. C. harmandii

7. Hymenial cystidia septate...................................................................................................................................................................8

7. Hymenial cystidia non septate............................................................................................................................................................9

8. Basidiome spathulate, ligulate, flabellate or reniform, papyraceous; pileus bright yellow .......................................... C. aurantiaca

8. Basidiome infundibuliform, coriaceous; pileus white or pallid ....................................................................................... C. diaphana

9. Pileus margin crenulate and incised; stipe lateral, with swollen base.......................................................................... C. komabensis

9. Pileus margin not crenulate or incised; stipe central, without swollen base ....................................................................................10

10. Pileus surface light grayish yellow, white towards the centre, sometimes zonate; hymenophore covered with distinct white fibres. ............................................................................................................................................................................................... C. fibrae

10. Pileus bright red-orange at the margin, ochre towards the centre, without zonatation; hymenophore smooth to rugose.................... ........................................................................................................................................................................................... C. pannosa