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Cribroperidinium jubaris
Cribroperidinium jubaris (Davies, 1983) Lentin and Williams, 1985
Originally Millioudodinium, subsequently (and now) Cribroperidinium.
Holotype: Davies, 1983, pl.5, fig.16; Jan du Chêne, 1986, pl.150, figs.17-18
Locus typicus: North-central Mackenzie King Island, Northwest Territories, Canada
Stratum typicum: Thitonian
Original diagnosis: Davies, 1983, p. 19: Millioudodinium jubaris
A species of Millioudodinium with a sub-rhombohedral outline and a short apical horn terminating in a pointed antennule. The autophragm is smooth and sutural ridges are unornamented. Tabulation: 4", 1a, 6"", 6c, 6""". 2p, 1"""", 1a. Archeopyle: P3. Size: length - 56(62)70 Ám: breadth - 60(74)79 Ám. The length is difficult to measure due to the usual oblique apical compression.
Original description: Davies, 1983, p. 19: Millioudodinium jubaris
The apical horn is 4 m in length with a pointed antennule 3.5 Ám long. The sutural ridges are low (0.5 Ám). The cingulum is narrow (5 Ám) and the sulcus is broad (11 Ám). The autophragm is characteristically highly refractive, appearing very bright. especially along the sutural crests.
Affinities:
Davies, 1983, p.19: Millioudodinium jubaris
This species differs from Millioudodinium ambiguum and M. mamiliferum since the latter are more ellipsoidal in shape and possess a granulate autophragm. Leptodinium eumorphum. L. mirable, L. areuatum and L. millioudii are more robust in shape and lack the apical conical horn and antennule. Impagidinium white: has higher pertorated sutural crests. Gonyaulacysta transparens (Sarjeant, 1959) Sarjeant. 1969 is more ovoidal and less angular in shape than M. jubaris.
Originally Millioudodinium, subsequently (and now) Cribroperidinium.
Holotype: Davies, 1983, pl.5, fig.16; Jan du Chêne, 1986, pl.150, figs.17-18
Locus typicus: North-central Mackenzie King Island, Northwest Territories, Canada
Stratum typicum: Thitonian
Original diagnosis: Davies, 1983, p. 19: Millioudodinium jubaris
A species of Millioudodinium with a sub-rhombohedral outline and a short apical horn terminating in a pointed antennule. The autophragm is smooth and sutural ridges are unornamented. Tabulation: 4", 1a, 6"", 6c, 6""". 2p, 1"""", 1a. Archeopyle: P3. Size: length - 56(62)70 Ám: breadth - 60(74)79 Ám. The length is difficult to measure due to the usual oblique apical compression.
Original description: Davies, 1983, p. 19: Millioudodinium jubaris
The apical horn is 4 m in length with a pointed antennule 3.5 Ám long. The sutural ridges are low (0.5 Ám). The cingulum is narrow (5 Ám) and the sulcus is broad (11 Ám). The autophragm is characteristically highly refractive, appearing very bright. especially along the sutural crests.
Affinities:
Davies, 1983, p.19: Millioudodinium jubaris
This species differs from Millioudodinium ambiguum and M. mamiliferum since the latter are more ellipsoidal in shape and possess a granulate autophragm. Leptodinium eumorphum. L. mirable, L. areuatum and L. millioudii are more robust in shape and lack the apical conical horn and antennule. Impagidinium white: has higher pertorated sutural crests. Gonyaulacysta transparens (Sarjeant, 1959) Sarjeant. 1969 is more ovoidal and less angular in shape than M. jubaris.