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Microdinium singulare
From Fensome et al., 2019:
Microdinium singulare Vozzhennikova, 1967, p.97, pl.39, figs.2a–e. Holotype: Vozzhennikova, 1967, pl.39, figs.2a–b; Lentin and Vozzhennikova, 1990, text-fig.63; lost according to Lentin and Vozzhennikova (1990, p.108). Originally (and now) Microdinium, subsequently Microdinium?. Questionable assignment: Stover and Evitt (1978, p.66) — however, Lentin and Vozzhennikova (1990, p.108) included the species in Microdinium without question. According to Lentin and Vozzhennikova (1990, p.108), no potential lectotype is available and the name should be restricted to the type. Age: Eocene.
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Lectotype: none available, according to Lentin and Vozzhennikova, 1990
Locus typicus: Laryak, W. Siberia
Stratum typicum: Eocene
Original diagnosis: Vozzhennikova, 1967, p.93
Theca broadly ovoicl, epitheca much smaller than hypotheca. Arrangement of plates and furrows as in type, plates and transverse furrow bordered with low, narrow, smooth crests, Plates covered with short tubercles which lie in the middle of the plates or parallel with the processes. Transverse furrow broad.
Dimensions: Holotype- length 31.1 µm, breadth 27.6 µm, width of transverse furrow 4.5 µm.
Microdinium singulare Vozzhennikova, 1967, p.97, pl.39, figs.2a–e. Holotype: Vozzhennikova, 1967, pl.39, figs.2a–b; Lentin and Vozzhennikova, 1990, text-fig.63; lost according to Lentin and Vozzhennikova (1990, p.108). Originally (and now) Microdinium, subsequently Microdinium?. Questionable assignment: Stover and Evitt (1978, p.66) — however, Lentin and Vozzhennikova (1990, p.108) included the species in Microdinium without question. According to Lentin and Vozzhennikova (1990, p.108), no potential lectotype is available and the name should be restricted to the type. Age: Eocene.
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Lectotype: none available, according to Lentin and Vozzhennikova, 1990
Locus typicus: Laryak, W. Siberia
Stratum typicum: Eocene
Original diagnosis: Vozzhennikova, 1967, p.93
Theca broadly ovoicl, epitheca much smaller than hypotheca. Arrangement of plates and furrows as in type, plates and transverse furrow bordered with low, narrow, smooth crests, Plates covered with short tubercles which lie in the middle of the plates or parallel with the processes. Transverse furrow broad.
Dimensions: Holotype- length 31.1 µm, breadth 27.6 µm, width of transverse furrow 4.5 µm.