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Nannoceratopsis deflandrei subsp. deflandrei
Nannoceratopsis deflandrei subsp. anabarensis Ilyina in Ilyina et al., 1994, p.15–16, pl.2, figs.1–6; pl.5, figs.4–5.
Holotype: Ilyina et al., 1994, pl.5, fig.4.
Age: late Pliensbachian–early Toarcian.
Original description (Evitt 1961)
Nannoceratopsis deflandrei Evitt, new species
Plate I, figures 1-14; Plate 2, figures 1-29; text-figures 5, 9-17
Diagnosis: Outline shape highly variable. Most specimens subtriangular with two antapical horns as short, broad points separated by gentle convativy; ventral point varies from prominent to completely absent; ,ventral point (rarely dorsal one) may be rounded. Sagittal band relatively wide. Ridges bounding lateral surfaces and crossing sagittal band (especially at the end of longitudinal furrow) commonly prominent. Mean size of subtriangular individuals: 73 µm by 60 µm in lateral view.
Size: forms with two antapical point clearly developed (based on 10 specimens); length 55-90 µm (mean 73 µm), width 45-70 µm (mean 60 µm). Forms with one antapical point only (based on 25 specimens); length 50-75 µm, width 40-55 µm. in many of the larger specimens the sagittal band is about 7 µm wide.
Holotype: Ilyina et al., 1994, pl.5, fig.4.
Age: late Pliensbachian–early Toarcian.
Original description (Evitt 1961)
Nannoceratopsis deflandrei Evitt, new species
Plate I, figures 1-14; Plate 2, figures 1-29; text-figures 5, 9-17
Diagnosis: Outline shape highly variable. Most specimens subtriangular with two antapical horns as short, broad points separated by gentle convativy; ventral point varies from prominent to completely absent; ,ventral point (rarely dorsal one) may be rounded. Sagittal band relatively wide. Ridges bounding lateral surfaces and crossing sagittal band (especially at the end of longitudinal furrow) commonly prominent. Mean size of subtriangular individuals: 73 µm by 60 µm in lateral view.
Size: forms with two antapical point clearly developed (based on 10 specimens); length 55-90 µm (mean 73 µm), width 45-70 µm (mean 60 µm). Forms with one antapical point only (based on 25 specimens); length 50-75 µm, width 40-55 µm. in many of the larger specimens the sagittal band is about 7 µm wide.