From Fensome et al., 2019:
Tenua dubia Jain and Millepied, 1975, p.152, pl.5, figs.75–76.
Holotype: Jain and Millepied, 1975, pl.5, fig.76; Fensome et al., 2019a, fig.18D.
NOW Cyclonephelium?. Originally (and now) Tenua Eisenack, subsequently Cyclonephelium, thirdly Cyclonephelium?.
Fensome et al. (2019a, p.47) retained this species in Tenua Eisenack
Age: Campanian–Maastrichtian.

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