1	Growing on little dead branches of deciduous trees or other plant residues ………………………………………… 2
1′	Growing on herbivore dung or nutrient-rich soil …………………………………………………………………………3
2	Diameter of pileus veil cells less than 40 μm ………………………………………………………………… C. afronivea
2′	Diameter of pileus veil cells more than 40 μm ……………………………………………………………C. caribaeonivea
3	Basidiomata small-sized, diameter of pileus usually less than 1.0 cm ………………………………………………… 4
3′	Basidiomata middle- to large-sized, diameter of pileus usually larger than 1.5 cm. …………………………………6
4	Central of pileus with light brown hue or pink-brown hue. ………………………………………………C. pseudonivea
4′	Central of pileus (almost) without light brown hue or pink-brown hue. ………………………………………………5
5	Basidiopores five-angular or heart-shaped in frontal view, which with rough surface.………………… C. igarashii
5′	Basidiopores subglobose, rhomboid or limoniform in frontal view, which with smooth surface. ……C. subigarashii
6	Pileus with radiate plication. ……………………………………………………………………………………C. furfuracea
6′	Pileus without radiate plication. ……………………………………………………………………………………………7
7	Pileus snowy white when mature. …………………………………………………………………………………………8
7′	Pileus greyish white when mature. ………………………………………………………………………………………10
8	Growing on horse dung. …………………………………………………………………………………………C. sericivia
8′	Growing on cow dung. ………………………………………………………………………………………………………9
9	Pleurocystidia present. ………………………………………………………………………………………………C. nivea
9′	Pleurocystidia absent. ………………………………………………………………………………………………C. iliensis
10	Length of basidiospores less than 10 μm.……………………………………………………………………… C. tenuipes
10′	Length of basidiospores 11–14 μm. ……………………………………………………………………………C. khorqiensis