Kisselevia major Vozzhennikova, 1967, p.104-105.

NOW Rhombodinium? vozzhennikovae. Originally Kisselevia major, subsequently (and now) Rhombodinium? vozzhennikovae.
Fensome and Williams (2004, p.382) did not follow Lentin and Vozzhennikova (1989) in considering this name to be not validly published. Vozzhennikova (1967) provided a description and designated a holotype from Vozzhennikova (1960): that the holotype is lost has no bearing on the validity of the name. Lentin and Vozzhennikova (1989) noted that no potential lectotype is available.
This name was not valdily published in Vozzhennikova (1963, fig.15) since that author did not provide a description.

Holotype: Vozzhennikova, 1960, pl.3, fig.1, lost according to Lentin and Vozzhennikova (1989, p.215-216).
Locus typicus: W. Siberia (Tara)
Age: Eocene.

Original diagnosis: Vozzhennikova, 1967, p.104-105
Theca very large. Epitheca triangular with convex sides and a small apical horn, the end of which is blunt and has a small notch in the middle. Hypotheca trapeziform with convex sides and two small antapical horns. Lateral angles drawn out, but bluntly terminated and with a notch. Surface of theca reticulate and finely pitted. Margin of transverse furrow provided with small teeth. The division of the theca into plates or fields has never been observed.
Dimensions: Length of theca 160 µm. breadth 135 µm.