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Glomodinium zabrum
Glomodinium zabrum Davies, 1983, p.18
Now Evansia. Originally Glomodinium, subsequently (and now) Evansia.
Holotype: Davies, 1983, pl.3, fig.12; text-figs.11A-C
Locus typicus: Central Amund Ringnes Dome, Northwest Territories, Canada
Stratum typicum: Bathonian-Oxfordian
Original diagnosis: Davies, 1983, p. 18
A species of Glomodinium with a prolate, lozenge to ellipsoidal shape and a sharply terminating apical horn. Two anterior hypotractal bulges may be present as indications of antapical and lateral horns. The ornament is densely granulate. Tabulation is not evident . Archeopyle: 3I. Size: length - 64(78)90 µm; breadth - 45(56)65 µm.
Original description: Davies, 1983, p. 18
The apical horn (9(14)19 µm in length) is conical beginning immediately anterior to the intercalary archeopyle and terminating in an antennule (3-6.5 µm in length) that is slightly enlarged distally. The rudimentary antapical horns are expressed by broad hypocystal bulges. The left antapical horn is generally more posteriorly displaced while the right antapical horn is often displayed as a conspicuous fold. Thegranulesarecoarse(0.5-1.5 µm in diameter), irregular in shape and aligned adcingularly. Compression is most often lateral.
Affinities:
Davies, 1983, p.18: This species resembles Gochteodinia verrueosa; however, the ornament is less robust. In Glomodinium zabros there is a definite 3I archeopyle.
Now Evansia. Originally Glomodinium, subsequently (and now) Evansia.
Holotype: Davies, 1983, pl.3, fig.12; text-figs.11A-C
Locus typicus: Central Amund Ringnes Dome, Northwest Territories, Canada
Stratum typicum: Bathonian-Oxfordian
Original diagnosis: Davies, 1983, p. 18
A species of Glomodinium with a prolate, lozenge to ellipsoidal shape and a sharply terminating apical horn. Two anterior hypotractal bulges may be present as indications of antapical and lateral horns. The ornament is densely granulate. Tabulation is not evident . Archeopyle: 3I. Size: length - 64(78)90 µm; breadth - 45(56)65 µm.
Original description: Davies, 1983, p. 18
The apical horn (9(14)19 µm in length) is conical beginning immediately anterior to the intercalary archeopyle and terminating in an antennule (3-6.5 µm in length) that is slightly enlarged distally. The rudimentary antapical horns are expressed by broad hypocystal bulges. The left antapical horn is generally more posteriorly displaced while the right antapical horn is often displayed as a conspicuous fold. Thegranulesarecoarse(0.5-1.5 µm in diameter), irregular in shape and aligned adcingularly. Compression is most often lateral.
Affinities:
Davies, 1983, p.18: This species resembles Gochteodinia verrueosa; however, the ornament is less robust. In Glomodinium zabros there is a definite 3I archeopyle.