From Williams et al., 2017:

[Evittodinium, Deflandre, 1964, p. 5030

Lentin and Williams (1976, p.159) considered this to be a "nomen dubium"

Type species: Evittodinium giselae, Deflandre, 1964 (figs.1–5)]

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Original description: [Deflandre, 1964]: (Translation: Stover and Evitt, 1978, p. 105):

Description:
Shell with an internal body. Epitheca has one horn, hypotheca has two horns; cingulum (equatorial) ornamented with slightly elevated apophyses.