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Dinopterygium reticulatum
Dinopterygium reticulatum Singh, 1983
Holotype: Singh, 1983, pl.57, fig.8
Paratype: Singh, 1983
Locus typicus: Upper Shaftesbury Formation of the Peace River area, Canada
Stratum typicum: Early Cenomanian
Original description: Singh, 1983, p. 156
Proximochorate cysts; body subpentagonal in lateral view and circular in apical-antapical view; paracingulum consisting of two, 6-8 Ám high, parallel, transverse, membranous ledges dividing the body into a smaller, dome-shaped epicyst and a larger, angular hypocyst; parasulcus indicated by a 15-20 Ám wide interruption in the paracingular ledges; paratabulation not completely discernible, presumably gonyaulacacean; parasutural crests 2-4 Ám high and continuing to the outer margin of the paracingular ledges; intratabular areas finely reticulate; lumina 1.5-3 Ám wide, archeopyle epicystal, type tAtP; all or some of the opercular paraplates usually remaining in place.
Size range: Diameter of the cyst in apical view 55(60)67 Ám. Holotype 65 Ám. Length of the paratype in lateral view 57 Ám. Breadth of the paratype in lateral view 60 Ám. Specimens measured 15.
Affinities:
Singh, 1983, p. 156: Dinopterygium reticulatum differs from other species of the genus Dinopterygium in having a finely reticulate ornamentation in the intratabular areas and in possessing low paracingular ledges and parasutural crests.
Holotype: Singh, 1983, pl.57, fig.8
Paratype: Singh, 1983
Locus typicus: Upper Shaftesbury Formation of the Peace River area, Canada
Stratum typicum: Early Cenomanian
Original description: Singh, 1983, p. 156
Proximochorate cysts; body subpentagonal in lateral view and circular in apical-antapical view; paracingulum consisting of two, 6-8 Ám high, parallel, transverse, membranous ledges dividing the body into a smaller, dome-shaped epicyst and a larger, angular hypocyst; parasulcus indicated by a 15-20 Ám wide interruption in the paracingular ledges; paratabulation not completely discernible, presumably gonyaulacacean; parasutural crests 2-4 Ám high and continuing to the outer margin of the paracingular ledges; intratabular areas finely reticulate; lumina 1.5-3 Ám wide, archeopyle epicystal, type tAtP; all or some of the opercular paraplates usually remaining in place.
Size range: Diameter of the cyst in apical view 55(60)67 Ám. Holotype 65 Ám. Length of the paratype in lateral view 57 Ám. Breadth of the paratype in lateral view 60 Ám. Specimens measured 15.
Affinities:
Singh, 1983, p. 156: Dinopterygium reticulatum differs from other species of the genus Dinopterygium in having a finely reticulate ornamentation in the intratabular areas and in possessing low paracingular ledges and parasutural crests.