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Disphaeria macropyla
Disphaeria macropyla Cookson and Eisenack, 1960; emend. Norvick in Norvick and Burger, 1976
Holotype: Cookson and Eisenack, 1960, pl. 3, fig. 13; Helby et al., 1987, fig.38I
Stratum typicum: Turonian
Locus typicus: Wapet"s Rough Range South no. 1 bore, W Australia
Original description: Cookson and Eisenack, 1960: Disphaeria macropyla
Shell membranous, thin-walled, usually compressed, smooth or with a few short scattered spinules. Capsule roughly spherical, wall thin, usually with scattered spinules, especially on the posterior surface. In two specimens very fine threads can be seen passing from both sides of the equatorial region of the capsule to the shell-membrane, but whether or not they form part of the structure by which the capsule is suspended in the shell is not clear.
Dimensions: Holotype: diameter of shell 80 Ám; diameter of capsule 40 Ám; aperture of shell 50 Ám. Range: diameter of shell 67-88 Ám; diameter of capsule 38-50 Ám.
Emended diagnosis: Norvick in Norvick and Burger, 1976, p.45
Pterate cyst with the endophragm and periphragm in contact on the dorsal surface only. Inner capsule ellipsoidal or sphaerical, granular or without surface ornament. The periphragm may be smooth, granular, or echinate and is expanded to a lamellar wing, which is attached on the dorsal side to the iner capsule. The ventral side of the inner body may or may not be representd by lines of periphragmic folds. The archaeopyle is formed by the loss of a single reflected precingular plate area, either P or P/P.
Holotype: Cookson and Eisenack, 1960, pl. 3, fig. 13; Helby et al., 1987, fig.38I
Stratum typicum: Turonian
Locus typicus: Wapet"s Rough Range South no. 1 bore, W Australia
Original description: Cookson and Eisenack, 1960: Disphaeria macropyla
Shell membranous, thin-walled, usually compressed, smooth or with a few short scattered spinules. Capsule roughly spherical, wall thin, usually with scattered spinules, especially on the posterior surface. In two specimens very fine threads can be seen passing from both sides of the equatorial region of the capsule to the shell-membrane, but whether or not they form part of the structure by which the capsule is suspended in the shell is not clear.
Dimensions: Holotype: diameter of shell 80 Ám; diameter of capsule 40 Ám; aperture of shell 50 Ám. Range: diameter of shell 67-88 Ám; diameter of capsule 38-50 Ám.
Emended diagnosis: Norvick in Norvick and Burger, 1976, p.45
Pterate cyst with the endophragm and periphragm in contact on the dorsal surface only. Inner capsule ellipsoidal or sphaerical, granular or without surface ornament. The periphragm may be smooth, granular, or echinate and is expanded to a lamellar wing, which is attached on the dorsal side to the iner capsule. The ventral side of the inner body may or may not be representd by lines of periphragmic folds. The archaeopyle is formed by the loss of a single reflected precingular plate area, either P or P/P.