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Selenopemphix coronata
Selenopemphix coronata Bujak in Bujak et al., 1980
Holotype: Bujak et al., 1980, pl.21, figs.4-5
Locus typicus: Isle of Wight, England
Stratum typicum: Late Eocene
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP
Selenopemphix coronata Bujak in Bujak et al., 1980. Bujak in Bujak et al. (1980, p.84) provided the following diagnosis, autocyst polar compression. Apex is prolonged into a small rounded horn. Antapex prolonged into two small rounded horns of approximately equal size. Autophragm laevigate to chagrinate, without perforations. Paracingular margins denoted by distally entire, spinate ridges. Spines closely spaced, about 4 µm long, slender, solid, tapering, distally bifurcate. The bifurcations are distally bulbous or connected to the nearest bifurcation of an adjacent spine. Spines are absent from the horns and precingular and postcingular zones. The parasulcus may be defined by a shallow indentation. Archeopyle intercalary, rounded resulting from the partial or complete detachment of the 2a. It is always asymmetrically located relative to the middorsal line. The operculum is free or remains attached along the posterior parasuture. Size autocyst thickness 31-36 µm, width 35-54 µm, process length 3.5-5 µm.
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Original diagnosis: Bujak in Bujak et al., 1980, p.84
Autocyst compression polar. Apex prolonged into a small rounded horn. Antapex prolonged into two small rounded horns of approximately equal size. Autophragm laevigate to chagrinate, without perforations. Paracingulum margins denoted by distally entire, spinate ridges. spines closely spaced, about 4 Ám long, slender, solid, tapering, distally bifurcate. The bifurcations are distally bulbous or connected to the nearest bifurcation of an adjacent spine. Spines are absent from the horns and precingular and postcingular zones. The parasulcus may be defined by a shallow indentation. 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.
Dimensions: autocyst thickness = 31-36 µm, breadth = 35-54 µm, spine length = 3-5 µm. 5 specimens measured.
Affinities:
Bujak in Bujak et al., 1980, p.84: S. coronata differs from other Selenopemphix species in the distinctive spine morphology.
Holotype: Bujak et al., 1980, pl.21, figs.4-5
Locus typicus: Isle of Wight, England
Stratum typicum: Late Eocene
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP
Selenopemphix coronata Bujak in Bujak et al., 1980. Bujak in Bujak et al. (1980, p.84) provided the following diagnosis, autocyst polar compression. Apex is prolonged into a small rounded horn. Antapex prolonged into two small rounded horns of approximately equal size. Autophragm laevigate to chagrinate, without perforations. Paracingular margins denoted by distally entire, spinate ridges. Spines closely spaced, about 4 µm long, slender, solid, tapering, distally bifurcate. The bifurcations are distally bulbous or connected to the nearest bifurcation of an adjacent spine. Spines are absent from the horns and precingular and postcingular zones. The parasulcus may be defined by a shallow indentation. Archeopyle intercalary, rounded resulting from the partial or complete detachment of the 2a. It is always asymmetrically located relative to the middorsal line. The operculum is free or remains attached along the posterior parasuture. Size autocyst thickness 31-36 µm, width 35-54 µm, process length 3.5-5 µm.
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Original diagnosis: Bujak in Bujak et al., 1980, p.84
Autocyst compression polar. Apex prolonged into a small rounded horn. Antapex prolonged into two small rounded horns of approximately equal size. Autophragm laevigate to chagrinate, without perforations. Paracingulum margins denoted by distally entire, spinate ridges. spines closely spaced, about 4 Ám long, slender, solid, tapering, distally bifurcate. The bifurcations are distally bulbous or connected to the nearest bifurcation of an adjacent spine. Spines are absent from the horns and precingular and postcingular zones. The parasulcus may be defined by a shallow indentation. 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.
Dimensions: autocyst thickness = 31-36 µm, breadth = 35-54 µm, spine length = 3-5 µm. 5 specimens measured.
Affinities:
Bujak in Bujak et al., 1980, p.84: S. coronata differs from other Selenopemphix species in the distinctive spine morphology.