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Endoscrinium irregulare
From Fensome et al., 2019:
Endoscrinium irregulare (Cookson and Eisenack, 1958, p.28–29, pl.10, figs.1–2) Riding and Fensome, 2002, p.22. Holotype: Cookson and Eisenack, 1958, pl.10, fig.1; Jan du Chêne et al., 1986a, pl.109, figs.1–2. Originally Wetzeliella, subsequently Wetzeliopsis (name not validly published), thirdly Scriniodinium?, fourthly Tubotuberella, fifthly (and now) Endoscrinium. Taxonomic junior synonym: Wetzeliella meckelfeldensis, according to Costa and Downie (1979, p.43) — however, Lentin and Williams (1981, p.290) retained Wetzeliella meckelfeldensis. Riding and Fensome (2002, p.22) cited the basionym as Scriniodinium irregulare rather than Wetzeliella irregularis, but otherwise fully referenced the basionym; hence, their validation of the combination is accepted here. Age: Late Jurassic.
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Original description: Cookson and Eisenack, 1958, p. 28-29
Shell roughly four-sided with rather abbreviated apical and antapical horns and two more strongly defined lateral horns; the membrane is provided with somewhat distally placed bifurcate proceses. At the antapex in the type, the processes have fused more or less giving it a somewhat lobed outline. The capsule is nearly shpaerical and completely fills the shell, a large pylome is situated near the apex. in two of four specimens a "girdle" is faintly indicated.
Dimensions: Holotype - overall length 119 µm (apical horn is turned back), width 133 µm; capsule 85 x 81 µm. Paratype - overall length 107 µm, width 114 µm, capsule 76 x 76 µm.
Endoscrinium irregulare (Cookson and Eisenack, 1958, p.28–29, pl.10, figs.1–2) Riding and Fensome, 2002, p.22. Holotype: Cookson and Eisenack, 1958, pl.10, fig.1; Jan du Chêne et al., 1986a, pl.109, figs.1–2. Originally Wetzeliella, subsequently Wetzeliopsis (name not validly published), thirdly Scriniodinium?, fourthly Tubotuberella, fifthly (and now) Endoscrinium. Taxonomic junior synonym: Wetzeliella meckelfeldensis, according to Costa and Downie (1979, p.43) — however, Lentin and Williams (1981, p.290) retained Wetzeliella meckelfeldensis. Riding and Fensome (2002, p.22) cited the basionym as Scriniodinium irregulare rather than Wetzeliella irregularis, but otherwise fully referenced the basionym; hence, their validation of the combination is accepted here. Age: Late Jurassic.
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Original description: Cookson and Eisenack, 1958, p. 28-29
Shell roughly four-sided with rather abbreviated apical and antapical horns and two more strongly defined lateral horns; the membrane is provided with somewhat distally placed bifurcate proceses. At the antapex in the type, the processes have fused more or less giving it a somewhat lobed outline. The capsule is nearly shpaerical and completely fills the shell, a large pylome is situated near the apex. in two of four specimens a "girdle" is faintly indicated.
Dimensions: Holotype - overall length 119 µm (apical horn is turned back), width 133 µm; capsule 85 x 81 µm. Paratype - overall length 107 µm, width 114 µm, capsule 76 x 76 µm.