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Gonyaulacysta cypraea
Gonyaulacysta? cypraea (Ioannides et al., 1977) Sarjeant, 1982
Now Psaligonyaulax?. Originally Psaligonyaulax, subsequently (and now) Psaligonyaulax?, thirdly Gonyaulacysta?.
Sarjeant, 1982, considered this to be a provisionally accepted species of Gonyaulacysta.
Holotype: Ioannides et al., 1977, pl.4, fig.5, text-fig.12; Jan du Chêne et al., 1986, pl.85, figs.1-2; pl.86, figs.9-11
Locus typicus: Clavell"s Hard, Dorset, England
Stratum typicum: Kimmeridgian
Original diagnosis: Ioanoides et al., 1977, p. 460: Psaligonyaluax cypraea
Cavate cysts; shell spherical to ovoidal; inner body more or less conformable to outline: at apex a very short bifid prominence formed by enclosing periphragm; antapical pericoel rounded. Tabulation 4", 1a, 6"", 6c, 6""", 1p, 1"""". Crests low, smooth, or minutely denticulate. Cingulum spiral. Archaeopyle, when present, precingular.
Original description: Ioannoides et al., 1977, p. 460: Psaligonyaluax cypraea
Apical prominence very short, 1-4 µm high, always bifid giving the appearance of two short conical horns connected at their base. Crests very low rarely exceeding 1.5 µm in height. Plates 1" and 1""" narrow and elongate, the latter reduced in size. A precingular archaeopyle, developed by loss of plate 3"", not always observed. Endophragm and periphragm smooth. Secondary folds present.
Dimensions. Range: overall length 58-76 µm, breadth 45-66 µm: capsule length 48-70 µm, breadth 43-63 µm (18 specimens measured).
Affinities:
Ioannoides et al., 1977, p. 460: Psaligonyaluax cypraea
Psaligonyaulax cypraea loannides, Stavrinos, and Downie, is distinguished from P. deflandrei Sarjeant, 1966, by its overall shape, the latter being spindle-shaped truncate posteriorly: the apical bifid horn is considerably shorter, and the crests much lower in P. cypraea.
Now Psaligonyaulax?. Originally Psaligonyaulax, subsequently (and now) Psaligonyaulax?, thirdly Gonyaulacysta?.
Sarjeant, 1982, considered this to be a provisionally accepted species of Gonyaulacysta.
Holotype: Ioannides et al., 1977, pl.4, fig.5, text-fig.12; Jan du Chêne et al., 1986, pl.85, figs.1-2; pl.86, figs.9-11
Locus typicus: Clavell"s Hard, Dorset, England
Stratum typicum: Kimmeridgian
Original diagnosis: Ioanoides et al., 1977, p. 460: Psaligonyaluax cypraea
Cavate cysts; shell spherical to ovoidal; inner body more or less conformable to outline: at apex a very short bifid prominence formed by enclosing periphragm; antapical pericoel rounded. Tabulation 4", 1a, 6"", 6c, 6""", 1p, 1"""". Crests low, smooth, or minutely denticulate. Cingulum spiral. Archaeopyle, when present, precingular.
Original description: Ioannoides et al., 1977, p. 460: Psaligonyaluax cypraea
Apical prominence very short, 1-4 µm high, always bifid giving the appearance of two short conical horns connected at their base. Crests very low rarely exceeding 1.5 µm in height. Plates 1" and 1""" narrow and elongate, the latter reduced in size. A precingular archaeopyle, developed by loss of plate 3"", not always observed. Endophragm and periphragm smooth. Secondary folds present.
Dimensions. Range: overall length 58-76 µm, breadth 45-66 µm: capsule length 48-70 µm, breadth 43-63 µm (18 specimens measured).
Affinities:
Ioannoides et al., 1977, p. 460: Psaligonyaluax cypraea
Psaligonyaulax cypraea loannides, Stavrinos, and Downie, is distinguished from P. deflandrei Sarjeant, 1966, by its overall shape, the latter being spindle-shaped truncate posteriorly: the apical bifid horn is considerably shorter, and the crests much lower in P. cypraea.