Cunninghamella, Matr.

Wang, Yu-Jie, Zhao, Ting, Wu, Wen-Ying, Wang, Mu & Liu, Xiao-Yong, 2022, Cunninghamella verrucosa sp. nov. (Mucorales, Mucoromycota) from Guangdong Province in China, Phytotaxa 560 (3), pp. 274-284 : 280-281

A key to the species and varieties of Cunninghamella

Together with the new species proposed in this paper, a total of 22 taxa of Cunninghamella , including 19 species and three varieties, were described in the world ( Zheng and Chen 2001, Guo et al. 2015, Hyde et al. 2016, Zhang et al. 2020, Hallur et al. 2021, Suwannarach et al. 2021, Zhao et al. 2021b). Consequently, a key to the 22 taxa is updated herein.

1. Chlamydospores present.............................................................................................................................................. C. saisamornae

1. Chlamydospores absent ......................................................................................................................................................................2

2. Zygospores present.............................................................................................................................................................................3

2. Zygospores absent ............................................................................................................................................................................10

3. Homothallic ................................................................................................................................................................ C. homothallica

3. Heterothallic .......................................................................................................................................................................................4

4. Sporangiola are two types, globose to broadly ellipsoid or ovoid, or dark giant sporangiola exclusively globose...........................5

4. Sporangiola are more types, ovoid, ellipsoid, globose, subglobose, or lacrymoid ............................................................................6

5. Sporophores without verticillate branches ............................................................................................ C. echinulata var. echinulata

5. Sporophores usually with many whorls of verticillate branches or pseudoverticillate branches.......... C. echinulata var. verticillata

6. Sporangiola reaching 15 µm...............................................................................................................................................................7

6. Sporangiola <15 µm .................................................................................................................................................... C. phaeospora

7. Suspensors mainly equal in shape but unequal in length, rarely unequal in shape...................................................... C. polymorpha

7. Suspensors mostly unequal in shape and size, rarely equal ...............................................................................................................8

8. Suspensors mainly equal in shape but unequal in length, rarely unequal in shape...................................................... C. polymorpha

8. Suspensors mostly unequal in shape and size, rarely equal ...............................................................................................................9

9. Maximum growth temperature ≤ 36 ˚C .............................................................................................................................. C. elegans

9. Maximum growth temperature> 36 ˚C ..................................................................................................................... C. blakesleeana

10 Sporangioles are globose.................................................................................................................................................................11

10. Sporangioles are globose to subglobose, ellipsoid, ovoid or lacrymoid ..........................................................................................15

11. Causing as opportunistic pathogens of mucormycosis................................................................................................... C. arunalokei

11. Not reported causing as opportunistic pathogens until now.............................................................................................................12

12. Vesicles clavate.................................................................................................................................................................................13

12. Vesicles globose to subglobose ........................................................................................................................................................14

13. Branches 1–4, single, in pairs, or 3–4 arranged pseudoverticillately, vesicles without warts............................................. C. clavata

13. Usually unbranched, occasionally simply branched, monopodial, vesicles bearing warts ............................... C. verrucosa sp. nov.

14. Maximum growth temperature ≤ 43 ˚C ......................................................................................................................... C. intermedia

14. Maximum growth temperature> 43 ˚C ........................................................................................................................ C. globospora

15. Sporophores with many septa.............................................................................................................................................. C. septata

15. Sporophores without septa, or one to serval septa ...........................................................................................................................16

16. Sporophores typically nodulous .................................................................................................................. C. echinulata var. nodosa

16. Sporophores not nodulous ................................................................................................................................................................17

17. Sporophores sympodial, not verticillate......................................................................................................................... C. vesiculosa 17. Sporophores not sympodial, but verticillate.....................................................................................................................................18

18. Sporophores pseudoverticillate ........................................................................................................................................................19

18. Sporophores not pseudoverticillate ..................................................................................................................................................20

19. Giant cells present ..................................................................................................................................................... C. gigacellularis

19. Giant cells absent.................................................................................................................................... C. echinulata var. antarctica

20. Vesicles subglobose to pyriform........................................................................................................................................ C. bigelovii

20. Vesicles globose to subglobose, ovoid or irregular ..........................................................................................................................21

21. Vesicles regular........................................................................................................................................................... C. guizhouensis

21. Vesicles irregular ..............................................................................................................................................................................22

22. Sporangiola lacrymoid....................................................................................................................................................... C. binariae

22. Sporangiola not lacrymoid .................................................................................................................................... C. multiverticillata