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Epelidosphaeridia turrita
From Fensome et al., 2019:
Brideaux, 1977, p.13, pl.4, figs.1–9. Holotype: Brideaux, 1977, pl.4, figs.1–3; Fensome et al., 2019a, figs.20M–O. NOW Epelidosphaeridia? Originally Canningia?, subsequently Ovoidinium, thirdly (and now) Epelidosphaeridia?. Questionable assignment: Brideaux (1977, p.13). Sangiorgi et al. (2009, p.252) speculated that this species may belong to Arcticacysta. Age: Barremian.
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Holotype: Brideaux, 1977, pl.4, figs.1-3
Locus typicus: Richardson Mountains, Mackenzie District, Canada
Stratum typicum: Barremian
Original description: Brideaux, 1977, p. 13: Canningia turrita
Shape: Pericyst apex not observed; antapex rounded or with left antapical prominence developed. Endocyst as above, the two layers closely appressed and without pericoel development; dorso-ventral compression.
Phragma: Periphragm thin, less than 1.0 µm thick; the surface scabrate, or with scattered grana or coni less than 1.0 µm high. Endophragm thin, less than 0.5 µm thick and smooth.
Paratabulation Paratabulation of 4?', ?!1-3)a, 7'', 0c, ?''', ?'''', ?p, denoted by the shape of the archeopyle and accessory parasutures in the precingular paraplate series; other evidence for paratabulation lacking. Endophragm showing no evidence of paratabulation.
Archeopyle/operculum: Archeopyle interpreted as being formed by the loss of at least three apical paraplates (probably 2'-4') and one or three intercalary paraplates (1a or 1a-3a). Operculum free, never observed; the two layers probably separating as a unit.
Pericingulum/perisulcus: Surface expression of pericingulum not observed on periphragm; some specimens possessing slight invaginations of the profile at mid-latitudes interpreted as representing the position of the pericingulum; no surface expression of perisulcus on periphragm.
Dimensions - Overall length, complete specimens not observed, 37-55 µm; overall width, 34-55 µm.
Brideaux, 1977, p.13, pl.4, figs.1–9. Holotype: Brideaux, 1977, pl.4, figs.1–3; Fensome et al., 2019a, figs.20M–O. NOW Epelidosphaeridia? Originally Canningia?, subsequently Ovoidinium, thirdly (and now) Epelidosphaeridia?. Questionable assignment: Brideaux (1977, p.13). Sangiorgi et al. (2009, p.252) speculated that this species may belong to Arcticacysta. Age: Barremian.
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Holotype: Brideaux, 1977, pl.4, figs.1-3
Locus typicus: Richardson Mountains, Mackenzie District, Canada
Stratum typicum: Barremian
Original description: Brideaux, 1977, p. 13: Canningia turrita
Shape: Pericyst apex not observed; antapex rounded or with left antapical prominence developed. Endocyst as above, the two layers closely appressed and without pericoel development; dorso-ventral compression.
Phragma: Periphragm thin, less than 1.0 µm thick; the surface scabrate, or with scattered grana or coni less than 1.0 µm high. Endophragm thin, less than 0.5 µm thick and smooth.
Paratabulation Paratabulation of 4?', ?!1-3)a, 7'', 0c, ?''', ?'''', ?p, denoted by the shape of the archeopyle and accessory parasutures in the precingular paraplate series; other evidence for paratabulation lacking. Endophragm showing no evidence of paratabulation.
Archeopyle/operculum: Archeopyle interpreted as being formed by the loss of at least three apical paraplates (probably 2'-4') and one or three intercalary paraplates (1a or 1a-3a). Operculum free, never observed; the two layers probably separating as a unit.
Pericingulum/perisulcus: Surface expression of pericingulum not observed on periphragm; some specimens possessing slight invaginations of the profile at mid-latitudes interpreted as representing the position of the pericingulum; no surface expression of perisulcus on periphragm.
Dimensions - Overall length, complete specimens not observed, 37-55 µm; overall width, 34-55 µm.