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Selenopemphix selenoides
Selenopemphix selenoides Benedek, 1972, p.48, pl.11, fig.15; pl.16, figs.5–8; text-fig.22. Emendations: Bujak in Bujak et al., 1980, p.86; Benedek and Sarjeant, 1981, p.336–338.
Taxonomic junior synonym: Lejeunia (as Lejeunecysta) paratenella, according to Benedek and Sarjeant (1981, p.336–338).
Motile equivalent: "some specimens" of Protoperidinium subinerme (Paulsen, 1904) Loeblich III, 1970, according to Lewis et al. (1984, p.31).
Holotype: Benedek, 1972, pl.11, fig.15; Benedek and Sarjeant, 1981, fig.9, nos.6–7; Head, 1993, fig.20, no.1.
Locus typicus: Tünisberg, Germany
Stratum typicum: Middle-late Oligocene
Translation Benedek, 1972: LPP
Original description: Benedek 1972, p.48
A Selenopemphix species with a slightly roughened, brown-coloured wall. At the antapical flanks, the autophragm is streched into pointed tips, and the antapical horns are interconnected laterally by a denticulate crest. The outer rim is thickened and ornamented with spine-like recesses of the outer membrane. In all specimens, a rounded trapezium-shaped opening was found, in a similar position as in S. nephroides. The opercula are mostly found in situ. Sizes: autophragm 56 µm (42/86 µm), pylome (archaeopyle) 16/20 µm (5 measurements). 8 specimens studied.
Emended diagnosis: Bujak, 1980, p.86
Autocyst compression polar, crescentic in polar view, always with a deeply incised parasulcus. Apex rounded or sometimes prolonged into a small rounded horn. Antapex rounded or prolonged into two small rounded horns of approximately equal size. Autophragm laevigate to chagrinate, often perforate. Paracingular margins denoted by perforate ridges. Parasulcus deep, delimited on the hypocyst by perforate ridges. Archaeopyle intercalary, rounded, resulting from the partial or complete detachment of the second anterior intercalary paraplate 2a. It is always asymmetrically located relative to the middorsal line. The operculum is free or remains attached along the posterior parasuture. Discussion. The diagnosis of S. selenoides is emended to specify its polar compression and the offset nature of the archaeopyle.
Emended Diagnosis: Benedek and Sarjeant, 1981, p. 337
Cyst proximate, broadly lozenge-shaped (but notched antapically) in ambitus, quite thick dorsoventrally, and crescentic in polar view. Epitract conical in ambitus, with an abbreviate, truncate apical prominence: hypotract in the form of a truncated cone, giving rise to two antapical horns, that at left significantly longer than that at right and both with pointed tips. An unusually broad, concave paracingulum separates epitract from hypotract: on both margins it is bordered by denticulate crests, the denticles sometimes evexate, often capitate or briefly bifurcate. Parasulcus marked by a strong incurving, giving the cyst its crescentic appearance in polar view. Folds or ridges mark the positions of some sutures; paratabulation otherwise not indicated. Surface of cyst laevigate overall. Archaeopyle formed by loss of a single intercalary paraplate (Type l); it is asymmetrically placed, with its largest portion to the left of the middorsal line. Archaeopyle index around 0.45. Dimensions: Range of dimensions: Length 45-50 µm, breadth 51-68 µm, thickness (from specimens in dorsoventral view) c. 42-50 µm, greatest width of archaeopyle c. 16-20 µm. Material: 12 specimens.
Taxonomic junior synonym: Lejeunia (as Lejeunecysta) paratenella, according to Benedek and Sarjeant (1981, p.336–338).
Motile equivalent: "some specimens" of Protoperidinium subinerme (Paulsen, 1904) Loeblich III, 1970, according to Lewis et al. (1984, p.31).
Holotype: Benedek, 1972, pl.11, fig.15; Benedek and Sarjeant, 1981, fig.9, nos.6–7; Head, 1993, fig.20, no.1.
Locus typicus: Tünisberg, Germany
Stratum typicum: Middle-late Oligocene
Translation Benedek, 1972: LPP
Original description: Benedek 1972, p.48
A Selenopemphix species with a slightly roughened, brown-coloured wall. At the antapical flanks, the autophragm is streched into pointed tips, and the antapical horns are interconnected laterally by a denticulate crest. The outer rim is thickened and ornamented with spine-like recesses of the outer membrane. In all specimens, a rounded trapezium-shaped opening was found, in a similar position as in S. nephroides. The opercula are mostly found in situ. Sizes: autophragm 56 µm (42/86 µm), pylome (archaeopyle) 16/20 µm (5 measurements). 8 specimens studied.
Emended diagnosis: Bujak, 1980, p.86
Autocyst compression polar, crescentic in polar view, always with a deeply incised parasulcus. Apex rounded or sometimes prolonged into a small rounded horn. Antapex rounded or prolonged into two small rounded horns of approximately equal size. Autophragm laevigate to chagrinate, often perforate. Paracingular margins denoted by perforate ridges. Parasulcus deep, delimited on the hypocyst by perforate ridges. Archaeopyle intercalary, rounded, resulting from the partial or complete detachment of the second anterior intercalary paraplate 2a. It is always asymmetrically located relative to the middorsal line. The operculum is free or remains attached along the posterior parasuture. Discussion. The diagnosis of S. selenoides is emended to specify its polar compression and the offset nature of the archaeopyle.
Emended Diagnosis: Benedek and Sarjeant, 1981, p. 337
Cyst proximate, broadly lozenge-shaped (but notched antapically) in ambitus, quite thick dorsoventrally, and crescentic in polar view. Epitract conical in ambitus, with an abbreviate, truncate apical prominence: hypotract in the form of a truncated cone, giving rise to two antapical horns, that at left significantly longer than that at right and both with pointed tips. An unusually broad, concave paracingulum separates epitract from hypotract: on both margins it is bordered by denticulate crests, the denticles sometimes evexate, often capitate or briefly bifurcate. Parasulcus marked by a strong incurving, giving the cyst its crescentic appearance in polar view. Folds or ridges mark the positions of some sutures; paratabulation otherwise not indicated. Surface of cyst laevigate overall. Archaeopyle formed by loss of a single intercalary paraplate (Type l); it is asymmetrically placed, with its largest portion to the left of the middorsal line. Archaeopyle index around 0.45. Dimensions: Range of dimensions: Length 45-50 µm, breadth 51-68 µm, thickness (from specimens in dorsoventral view) c. 42-50 µm, greatest width of archaeopyle c. 16-20 µm. Material: 12 specimens.