Kofoid, C.A. (1907), Reports on the scientific results of the expedition to the eastern tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer 'Albatross', from October, 1904, to March, 1905. Lieut. Commander L. M. Garrett, U.S.N., commanding. IX New species of dinoflagellates. Bulletin of the Museum of Comparative Zoology Harvard 50 (6): 176, plate 5, fig 34 [tax. nov.]

• Type locality: Station, 4711. Eastern tropical Pacific Ocean

Wood, E.J.F. (1954), Dinoflagellates of the Australian region. Australian Journal of Marine and Freshwater Research 5: - [secondary reference]

taxonomic synonym: Peridinium steinii var. elongata G.Karst. legitimate

Balech, E. (1974), El genero Protoperidinium Bergh, 1881 (Peridinium Ehrenberg 1831, partim). Revista del Museo Argentino de Ciencias Naturales Bernardino Rivadavia e instituto nacional de investigacion de las ciencias naturales. Hidrobiologya 4 (1): 67 [basionym]

basionym of: Protoperidinium tenuissimum (Kof.) Balech legitimate

ABRS (2008), Australian Algal Name Index Edn. 2008: - [secondary reference]

McCarthy, P. (Comp.) (2012), Census of Australian Marine Dinoflagellates: - [nomenclatural synonym]

nomenclatural synonym of: Protoperidinium tenuissimum (Kof.) Balech legitimate

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