From Fensome et al., 2019:
Microdinium kustanaicum Vozzhennikova, 1967, p.96, pl.37, figs.1a–b. Holotype: Vozzhennikova, 1967, pl.37, figs.1a–b; Lentin and Vozzhennikova, 1990, text-fig.60; lost according to Lentin and Vozzhennikova (1990, p.106). Originally (and now) Microdinium, subsequently Microdinium?. Questionable assignment: Stover and Evitt (1978, p.66) — however, Lentin and Vozzhennikova (1990, p.106) retained this species in Microdinium without question. According to Lentin and Vozzhennikova (1990, p.106), no potential lectotype is available and they recommended that the name be restricted to the type material. Age: ?Maastrichtian.

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Lectotype: none available, according to Lentin and Vozzhennikova, 1990
Locus typicum: Kazakhstan
Stratum typicum: ?Maastrichtian
Translation Vozzhennikova, 1967: Lentin and Vozzhennikova, 1990

Original description: Vozzhennikova, 1967, p.96
Theca spherical, divided by a broad transverse furrow into two unequal parts. Epitheca smaller than hypotheca. Plates and the margin of transverse furrow bordered by a series of tall, transversely striated crests. Thecal surface covered with numerous short tubercles or with short, slender, obtuse-ended outgrowths.

Size: Holotype, length 32 µm, width 29 µm. Range, length 32-35 µm, width 28-30 µm.