Murrill, W.A. (1915), North American Flora 9 (4): 269 [tax. nov.]

Pegler, D.N. (1977), A preliminary Agaric flora of East Africa. Kew Bulletin Additional Series 6: 139 [basionym]

basionym of: Collybia subcyathiformis (Murrill) Pegler legitimate

Oliveira, J.S., Vargas-Isla, R., Cabral, T.S. et al. (15 April 2019), Progress on the phylogeny of the Omphalotaceae: Gymnopus s. str., Marasmiellus s. str., Paragymnopus gen. nov. and Pusillomyces gen. nov. Mycological Progress 18: 735 [basionym]

basionym of: Marasmiellus subcyathiformis (Murrill) J.S.Oliveira legitimate

Petersen, R.H. & Hughes, K.W. (23 July 2021), Collybiopsis and its type species, Co. ramealis. Mycotaxon 136 (2): 344 [basionym]

basionym of: Collybiopsis subcyathiformis (Mont.) R.H.Petersen legitimate

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