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Scriniodinium apatelum
Scriniodinium apatelum Cookson and Eisenack, 1960b, p.249, pl.37, figs.12–13. Emendation: Sarjeant, 1982b, p.42, as Tubotuberella apatela.
Now Tubotuberella. Originally Scriniodinium, subsequently Psaligonyaulax, thirdly (and now) Tubotuberella, fourthly Glabridinium.
Holotype: Cookson and Eisenack, 1960, pl.37, fig.12; Jan du Chêne et al., 1986, pl.124, figs.1-2
Locus typicus: Canning Basin, Western Austalia
Stratum typicum: Oxfordiam - Lower Kimmeridgian
Original description: Cookson and Eisenack, 1960, p. 249
Shell flat, the main portion ovoidal to somewhat rhomboidal; epitheca with a small, thin-walled, cylindrical and truncate horn; hypotheca narrowing distally towards a square opening with a smooth or serrated edge and sometimes with a short spine-like projection at each angle. The girdle is circular, occasionally well marked but usually only indicated by narrow ledges on the two sides. Membranes of shell thin, smooth, perforate or serrate at the sides. The capsule, which fills the shell laterally and follows its outline in the middle region, terminates in a short apical prominence. A relatively large, hoof-shaped pylome extends from just beneath the apex to the level of the girdle. Dimensions: Holotype - 120 µm long, 58 µm broad; capsule 80 µm long, 58 µm broad. Range - 70-145 µm x 42-72 µm.
Affinities:
Cookson and Eisenack, 1960, p. 249: S. apelatum has some of the features of Gonyaulax jurassica Defl. and G. eisenacki Defl., but non of the specimens have shown any sign of tabulation.
Now Tubotuberella. Originally Scriniodinium, subsequently Psaligonyaulax, thirdly (and now) Tubotuberella, fourthly Glabridinium.
Holotype: Cookson and Eisenack, 1960, pl.37, fig.12; Jan du Chêne et al., 1986, pl.124, figs.1-2
Locus typicus: Canning Basin, Western Austalia
Stratum typicum: Oxfordiam - Lower Kimmeridgian
Original description: Cookson and Eisenack, 1960, p. 249
Shell flat, the main portion ovoidal to somewhat rhomboidal; epitheca with a small, thin-walled, cylindrical and truncate horn; hypotheca narrowing distally towards a square opening with a smooth or serrated edge and sometimes with a short spine-like projection at each angle. The girdle is circular, occasionally well marked but usually only indicated by narrow ledges on the two sides. Membranes of shell thin, smooth, perforate or serrate at the sides. The capsule, which fills the shell laterally and follows its outline in the middle region, terminates in a short apical prominence. A relatively large, hoof-shaped pylome extends from just beneath the apex to the level of the girdle. Dimensions: Holotype - 120 µm long, 58 µm broad; capsule 80 µm long, 58 µm broad. Range - 70-145 µm x 42-72 µm.
Affinities:
Cookson and Eisenack, 1960, p. 249: S. apelatum has some of the features of Gonyaulax jurassica Defl. and G. eisenacki Defl., but non of the specimens have shown any sign of tabulation.