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Palaeostomocystis sinuosa
Palaeostomocystis sinuosa Cookson and Eisenack, 1960
Now Dollidinium. Originally Palaeostomocystis, subsequently (and now) Dollidinium.
Holotype: Cookson and Eisenack 1960, pl.38, fig.16; lost according to
Helby and Stover, 1987
Lectotype (considered as a neotype): Helby and Stover, 1987, figs. 4A-C;
designated by Helby and Stover, 1987
Locus typicus: Canning Basin, Australia
Stratum typicum: Tithonian-Berriasian
Original description: Cookson and Eisenack, 1960, p. 258
Shell small, rather flat, outline squarish and +/- deeply embayed with four to seven rounded prominences; a clearly marked circular opening occupies the greater part of one of the "bays". The shell-membrane is thin and finely granular, sometimes more pronouncedly so over the ends of the prominences. Dimensions - Range 38-54 Ám, opening 12-24 Ám.
Now Dollidinium. Originally Palaeostomocystis, subsequently (and now) Dollidinium.
Holotype: Cookson and Eisenack 1960, pl.38, fig.16; lost according to
Helby and Stover, 1987
Lectotype (considered as a neotype): Helby and Stover, 1987, figs. 4A-C;
designated by Helby and Stover, 1987
Locus typicus: Canning Basin, Australia
Stratum typicum: Tithonian-Berriasian
Original description: Cookson and Eisenack, 1960, p. 258
Shell small, rather flat, outline squarish and +/- deeply embayed with four to seven rounded prominences; a clearly marked circular opening occupies the greater part of one of the "bays". The shell-membrane is thin and finely granular, sometimes more pronouncedly so over the ends of the prominences. Dimensions - Range 38-54 Ám, opening 12-24 Ám.