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Wetzeliella lineidentata
From Fensome et al., 2019:
Wetzeliella lineidentata Deflandre and Cookson, 1955
NOW Stichodinium?. Originally Wetzeliella, subsequently Wilsonidium, thirdly (and now) Stichodinium?
The species name Wetzeliella lineidentata was a nomen nudum in Deflandre and Cookson, 1954.
Holotype: Deflandre and Cookson, 1955, pl.5, fig.50
Locus typicus: Near Denmark, W. Australia
Stratum typicum: Eocene
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Original diagnosis: Deflandre and Cookson, 1955, p.253
Cell encysted, compressed, nearly quadrangular with a toothed margin. Epitheca imperfectly preserved, probably triangular, opening apparently quadrangular; hypotheca with 2 short unequal horns. Membranes of cyst thick, roughened. Cell membranes with lines of numerous short, blunt teeth, in surface view relatively widely spaced both equatorially and so as to delimit roughly polygonal areas analogous to the plates characterizing the Peridiniales.
Dimensions: Overall length 118 µm, breadth 110 µm; cyst, length 84 µm, breadth 77 µm.
Affinities:
Deflandre and Cookson, 1955, p.253 (annotated)
This unique specimen, although incomplete, merits description because of its distinctness from all other known species of Wetzeliella. It is of special interest on account of the alignment of the small spines, as drawn in Figures 17 and 18, not only in the equatorial zone but so as to form a kind of tabulation, both dinoflagellate characters.
Wetzeliella lineidentata Deflandre and Cookson, 1955
NOW Stichodinium?. Originally Wetzeliella, subsequently Wilsonidium, thirdly (and now) Stichodinium?
The species name Wetzeliella lineidentata was a nomen nudum in Deflandre and Cookson, 1954.
Holotype: Deflandre and Cookson, 1955, pl.5, fig.50
Locus typicus: Near Denmark, W. Australia
Stratum typicum: Eocene
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Original diagnosis: Deflandre and Cookson, 1955, p.253
Cell encysted, compressed, nearly quadrangular with a toothed margin. Epitheca imperfectly preserved, probably triangular, opening apparently quadrangular; hypotheca with 2 short unequal horns. Membranes of cyst thick, roughened. Cell membranes with lines of numerous short, blunt teeth, in surface view relatively widely spaced both equatorially and so as to delimit roughly polygonal areas analogous to the plates characterizing the Peridiniales.
Dimensions: Overall length 118 µm, breadth 110 µm; cyst, length 84 µm, breadth 77 µm.
Affinities:
Deflandre and Cookson, 1955, p.253 (annotated)
This unique specimen, although incomplete, merits description because of its distinctness from all other known species of Wetzeliella. It is of special interest on account of the alignment of the small spines, as drawn in Figures 17 and 18, not only in the equatorial zone but so as to form a kind of tabulation, both dinoflagellate characters.