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 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, Published as part of 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, pp. 274-284 in Phytotaxa 560 (3) on pages 280-281, DOI: 10.11646/phytotaxa.560.3.2, http://zenodo.org/record/7042667, {"references":["Zheng, R. Y. & Chen, G. Q (2001) A monograph of Cunninghamella. Mycotaxon 80: 1 - 75","Guo, J., Wang, H., Liu, D., Zhang, J. N., Zhao, Y. H., Liu, T. X. & Xin, Z. H. (2015) Isolation of Cunninghamella bigelovii sp. nov. CGMCC 8094 as a new endophytic oleaginous fungus from Salicornia bigelovii. Mycological Progress 14: 1 - 8. https: // doi. org / 10.1007 / s 11557 - 015 - 1029 - z","Hyde, K. D., Hongsanan, S., Jeewon, R., Bhat, J. D., McKenzie, E. H. C., Jones, E. B. G., Phookamsak, R., Ariyawansa, H. A., Boonmee, S., Zhao, Q., Abdel-Aziz, F. A., Abdel-Wahab, M. A., Banmai, S., Chomnunti, P., Cui, B. K., Daranagama, D. A., Das, K., Dayarathne, M. C., De Silva, N. I., Dissanayake, A. J., Doilom, M., Ekanayaka, A. H., Gibertoni, T. B., Go´es-Neto, A., Huang, S. K., Jayasiri, S. C., Jayawardena, R., Konta, S., Lee, H. B., Li, W. J., Lin, C. G., Liu, J. K., Lu, Y. Z., Luo, Z. L., Manawasinghe, I. S., Manimohan, P., Mapook, A., Niskanen, T., Norphanphoun, C., Papizadeh, M., Perera, R. H., Phukhamsakda, C., Richter, C., de A. Santiago, A. L. C. M., Drechsler-Santos, E. R., Senanayake, I. C. & Tanaka, K. (2016) Fungal diversity notes 367 - 490: taxonomic and phylogenetic contributions to fungal taxa. Fungal Diversity 80: 1 - 270. https: // doi. org / 10.1007 / s 13225 - 016 - 0373 - x","Zhang, Z. Y., Zhao, Y. X., Shen, X., Chen, W. H., Han, Y. F., Huang, J. Z. & Liang, Z. Q. (2020) Molecular phylogeny and morphology of Cunninghamella guizhouensis sp. nov. (Cunninghamellaceae, Mucorales), from soil in Guizhou, China. Phytotaxa 455: 31 - 39. https: // doi. org / 10.11646 / phytotaxa. 455.1.4","Hallur, V., Prakash, H., Sable, M., Preetam, C., Purushotham, P., Senapati, R., Shankarnarayan, S. A., Bag, N. D. & Rudramurthy, S. M. (2021) Cunninghamella arunalokei a new species of Cunninghamella from India causing disease in an immunocompetent individual. Journal of Fungi 7: 670. https: // doi. org / 10.3390 / jof 7080670","Suwannarach, N., Kumla, J., Supo, C., Honda, Y., Nakazawa, T., Khanongnuch, C. & Wongputtisin, P. (2021) Cunninghamella saisamornae (Cunninghamellaceae, Mucorales), a new soil fungus from northern Thailand. Phytotaxa 509: 291 - 300. https: // doi. org / 10.11646 / phytotaxa. 509.3.4","Zhao, H., Zhu, J., Zong, T. K., Liu, X. L., Ren, L. Y., Lin, Q., Qiao, M., Nie, Y., Zhang, Z. D. & Liu, X. Y. (2021 b) Two new species in the family Cunninghamellaceae from China. Mycobiology 49: 142 - 150."]}