Craterium

Zhao, Fengyun, Li, Yu, Hsiang, Tom & Liu, Shuyan, 2018, A new species in Physaraceae, Craterium yichunensis, and a new record for C. dictyosporum in China, Phytotaxa 351 (2), pp. 181-185 : 184

Key to the genus Craterium

1. Sporocarps dehiscing by a distinct lid................................................................................................................................................2

- Sporocarps not dehiscing by a distinct lid..........................................................................................................................................8

2. Spores reticulate ............................................................................................................................................................. C. retisporum

- Spores spinulose or warted.................................................................................................................................................................3

3. Spores with scattered strong spines....................................................................................................................................................4

- Spores minutely and evenly warted or spinulose...............................................................................................................................5

4. Spores 10–12 μm, with spines 1 μm tall ..................................................................................................................... C. rubronodum

- Spores 13–14(–15) μm, with groups of confluent spines.................................................................................................. C. costatum

5. Lid dome-shaped, veined, fragmenting by preformed lines at dehiscence ................................................................... C. reticulatum

- Lid convex or flat, not veined, remaining as a whole at dehiscence..................................................................................................6

6. Peridium single; sporocarps short (0.1–0.8 mm high).......................................................................................................................7

- Peridium double; sporocarps taller (≤ 1.5 mm high).......................................................................................................... C. minutum

7. Columella absent ........................................................................................................................................................ C. microcarpum

- Columella present.......................................................................................................................................................... C. concinnum

8. Sporocarps mostly circumscissile.......................................................................................................................................................9

- Sporocarps rarely circumscissile......................................................................................................................................................11

9. Columella and pseudocolumella absent ....................................................................................................................... C. yichunensis

- Pseudocolumella present..................................................................................................................................................................10

10. Sporocarps usually stalked; lime nodes of the capillitium large, lid ± distinct....................................................... C. leucocephalum

- Sporocarps sessile or short-stalked; lime nodes of the capillitium small, lid conspicuous................................... C. aureonucleatum

11. Sporocarps yellow............................................................................................................................................................................12

- Sporocarps bright pink, purplish pink, red-brown, purplish brown, dark brown to black...............................................................14

12. Sporocarps stalked............................................................................................................................................................... C. aureum

-. Sporocarps sessile or very short-stalked...........................................................................................................................................13

13. Sporocarps subcylindric ........................................................................................................................................... C. aureomagnum

- Sporocarps corniculate ............................................................................................................................................... C. corniculatum

14. Sporocarps bright pink, purplish pink ....................................................................................................................... C. paraguayense

- Sporocarps red-brown, purplish brown, dark brown to black..........................................................................................................15

15. Spores warted, <13 μm in diam...................................................................................................................................... C. atrolucens

- Spores coarsely warted, subreticulate or reticulate,>13 μm in diam...............................................................................................16

16. Spores with dark prominent warts................................................................................................................................... C. obovatum

- Spores subreticulate or reticulate......................................................................................................................................................17

17. Spores loosely reticulate by ridges about 1 μm high...................................................................................................... C. muscorum

- Spores with an incomplete net of broad spines ......................................................................................................... C. dictyosporum