Back
Palaeotetradinium minusculum
From Fensome et al., 2019:
Palaeotetradinium minisculum (Alberti, 1961, p.10–11, pl.1, fig.10; pl.12, fig.4) Stover and Evitt, 1978, p.71. Holotype: Alberti, 1961, pl.1, fig.10. Originally Wetzeliella subgenus Rhombodinium, subsequently Rhombodinium?, thirdly Inversidinium, fourthly (and now) Palaeotetradinium. Taxonomic junior synonym: Inversidinium exilimurum, according to Stover and Evitt (1978, p.71). Age: Early Eocene.
---------------------------------------------------------------------------------------------------
Locus typicus: Hildesheim, Germany
Stratum typicum: Early Eocene
Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 10: Weteliella (Rhombodinium) miniscula
Shell flattened, almost rhomboedrical; wepitheca triangular slightly elongated. Lateral horns short, indented at the free ends. Transverse furrow indicated. Epitheca shorter than the inverse hat-shaped hypotheca. With two antapical bulges, separated by parallel to the longitudinal direction running gap. Presumably with a delicate inner body. The shell membrane is transparent, yellowish. A transverse furrow is indicated on one side ( may be a fault). A pylome is questionable.
Palaeotetradinium minisculum (Alberti, 1961, p.10–11, pl.1, fig.10; pl.12, fig.4) Stover and Evitt, 1978, p.71. Holotype: Alberti, 1961, pl.1, fig.10. Originally Wetzeliella subgenus Rhombodinium, subsequently Rhombodinium?, thirdly Inversidinium, fourthly (and now) Palaeotetradinium. Taxonomic junior synonym: Inversidinium exilimurum, according to Stover and Evitt (1978, p.71). Age: Early Eocene.
---------------------------------------------------------------------------------------------------
Locus typicus: Hildesheim, Germany
Stratum typicum: Early Eocene
Translation Alberti, 1961: LPP
Original diagnosis: Alberti, 1961, p. 10: Weteliella (Rhombodinium) miniscula
Shell flattened, almost rhomboedrical; wepitheca triangular slightly elongated. Lateral horns short, indented at the free ends. Transverse furrow indicated. Epitheca shorter than the inverse hat-shaped hypotheca. With two antapical bulges, separated by parallel to the longitudinal direction running gap. Presumably with a delicate inner body. The shell membrane is transparent, yellowish. A transverse furrow is indicated on one side ( may be a fault). A pylome is questionable.