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Lejeunecysta sabrina
From Fensome et al., 2019:
Lejeunecysta sabrina Reid, 1977, p.441–442, pl.2, figs.15–17.
Holotype: Reid, 1977, pl.2, fig.15.
NOW Lejeunecysta. Originally Trinovantedinium, subsequently (and now) Lejeunecysta.
Motile equivalent: Protoperidinium leonis Pavillard, 1916) Balech, 1974, according to Harland (1981, p.68). NIA.
Locus typicus: Dee Estuary, England
Stratum typicum: Recent
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Original diagnosis: Reid, 1977, p.441: Trinovantedinium sabrinum
Test pentagonal in dorsoventral view with a deep ventral sulcus and two antapical horns separated by a deep or shallow antapical depression. Girdle equatorial, excavated, inclined and slightly displaced or circular; defined by sutures and/or parallel thickenings of the wall. Wall thin, thickening in the tips of the antapical horns, the girdle outline and in the sulcal flagellar scars. Surface microgranular. Archeopyle intercalary.
Dimensions: Holotype Length 84 Ám. Breadth 77 Ám. Range: Length 58-90 Ám. Breadth 58-76 Ám. Thickness 40-53 Ám. Antapical tips 23-35 Ám apart Archeopyle 19-20 Ám wide, 23-28 Ám high. Number of specimens measured 15.
Original description: Reid, 1977, p.441: Trinovantedinium sabrinum
The test is generally bilaterally symmetrical but may be asymmetrical. It is pentagonal, concavo-convex in polar view and approximates to a diamond shape in lateral view. The hypotract is concave and the epitract straight to convex, and may show a shoulder. At the apex which is frequently flattened, tongue shaped thickenings of the wall reflect the position of the apical pore. The wall is thin, single layered, of constant thickness and with a characteristic yellow brown colour. Longitudinal striations, thickenings or folds of the wall are frequently found on the test and diamond shaped thickenings may outline the girdle. The ventral sulcus extends on to the epitract, the sulcal plates terminating just anterior to the girdle. Two central, elongate thickenings in the sulcus mark the reflected position of the thecal flagellar pores. There may be no evidence for tabulation or it may be indicated under high magnification by sutures to give the formula 4", 3A, 7" g?, 5""", 2"""". The wall appears to be thinner along the line of these sutures. They outline a tabulation which is very similar to that figured by Lebour (1925) for Peridinium leonis. The apical, precingular, cingular and postcingular sutures were always best defined.
Lejeunecysta sabrina Reid, 1977, p.441–442, pl.2, figs.15–17.
Holotype: Reid, 1977, pl.2, fig.15.
NOW Lejeunecysta. Originally Trinovantedinium, subsequently (and now) Lejeunecysta.
Motile equivalent: Protoperidinium leonis Pavillard, 1916) Balech, 1974, according to Harland (1981, p.68). NIA.
Locus typicus: Dee Estuary, England
Stratum typicum: Recent
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Original diagnosis: Reid, 1977, p.441: Trinovantedinium sabrinum
Test pentagonal in dorsoventral view with a deep ventral sulcus and two antapical horns separated by a deep or shallow antapical depression. Girdle equatorial, excavated, inclined and slightly displaced or circular; defined by sutures and/or parallel thickenings of the wall. Wall thin, thickening in the tips of the antapical horns, the girdle outline and in the sulcal flagellar scars. Surface microgranular. Archeopyle intercalary.
Dimensions: Holotype Length 84 Ám. Breadth 77 Ám. Range: Length 58-90 Ám. Breadth 58-76 Ám. Thickness 40-53 Ám. Antapical tips 23-35 Ám apart Archeopyle 19-20 Ám wide, 23-28 Ám high. Number of specimens measured 15.
Original description: Reid, 1977, p.441: Trinovantedinium sabrinum
The test is generally bilaterally symmetrical but may be asymmetrical. It is pentagonal, concavo-convex in polar view and approximates to a diamond shape in lateral view. The hypotract is concave and the epitract straight to convex, and may show a shoulder. At the apex which is frequently flattened, tongue shaped thickenings of the wall reflect the position of the apical pore. The wall is thin, single layered, of constant thickness and with a characteristic yellow brown colour. Longitudinal striations, thickenings or folds of the wall are frequently found on the test and diamond shaped thickenings may outline the girdle. The ventral sulcus extends on to the epitract, the sulcal plates terminating just anterior to the girdle. Two central, elongate thickenings in the sulcus mark the reflected position of the thecal flagellar pores. There may be no evidence for tabulation or it may be indicated under high magnification by sutures to give the formula 4", 3A, 7" g?, 5""", 2"""". The wall appears to be thinner along the line of these sutures. They outline a tabulation which is very similar to that figured by Lebour (1925) for Peridinium leonis. The apical, precingular, cingular and postcingular sutures were always best defined.