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Glomodinium granulatum
Glomodinium granulatum (Pocock, 1972) Arhus et al., 1989
Now Evansia. Originally (and now) Evansia, subsequently Glomodinium. Lentin and Williams, 1993, retained this species in Evansia Pocock, 1972, since in they treated Glomodinium as a tax. jr. synonym of Evansia.
Holotype: Pocock, 1972, pl.24, fig.7; Jansonius, 1986, pl.5, figs.1-3, text-figs.10a-b
Locus typicus: Imperial Tidewater Wapella, Western Canada
Stratum typicum: Late Bajocian
Original description: Pocock, 1972, p.95: Evansia granulata
Vesicle dorso-ventrally flattened; outline oval with short projecting apical horn; archeopyle intercalary with simple free operculum; no plating visible; transverse and longitudinal furrows not detectable; theca two-layered comprising an inner smoothly rounded capsule about 0.5 µm thick overlain by a tightly enveloping outer granulose layer 1.0-1.5 µm thick; finely and closely granulose, giving the surface a spongy appearance; apical horn solid; about 10.0 Ám Iong; antapically a small process about 2.0 µm long formed by thickening of the outer layer; colourless; theca 58.3x40.7 µm; capsule 44.0x37.4 µm.
Now Evansia. Originally (and now) Evansia, subsequently Glomodinium. Lentin and Williams, 1993, retained this species in Evansia Pocock, 1972, since in they treated Glomodinium as a tax. jr. synonym of Evansia.
Holotype: Pocock, 1972, pl.24, fig.7; Jansonius, 1986, pl.5, figs.1-3, text-figs.10a-b
Locus typicus: Imperial Tidewater Wapella, Western Canada
Stratum typicum: Late Bajocian
Original description: Pocock, 1972, p.95: Evansia granulata
Vesicle dorso-ventrally flattened; outline oval with short projecting apical horn; archeopyle intercalary with simple free operculum; no plating visible; transverse and longitudinal furrows not detectable; theca two-layered comprising an inner smoothly rounded capsule about 0.5 µm thick overlain by a tightly enveloping outer granulose layer 1.0-1.5 µm thick; finely and closely granulose, giving the surface a spongy appearance; apical horn solid; about 10.0 Ám Iong; antapically a small process about 2.0 µm long formed by thickening of the outer layer; colourless; theca 58.3x40.7 µm; capsule 44.0x37.4 µm.