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Distatodinium scariosum
Distatodinium scariosum Liengjarern et al., 1980
Holotype: Liengjarern et al., 1980, pl.54, fig.3
Locus typicus: Bouldnor Cliff, Isle of Wight, England
Stratum typicum: Early Oligocene
Original diagnosis: Liengjarern et al., 1980, p.477
Distatodinium with broad, hollow, intratabular processes (usually one per paraplate), oblate to subtriangular in cross-section, distally expanded, and bearing a variable number of thick secae on their distal margin. Cingular area devoid of processes.
Original description: Liengjarern et al., 1980, p.477
The central body ambitus is oval, antero-posteriorly elongate. Apex and antapex are rounded; the antapex may be prolonged into a corona formed by the expanded bases of the antapical processes.
The insertion of the processes on the central body is subcircular, oblate, or triangular. The processes occur one per paraplate, except on the antapical paraplate (1""""), where there may be two or more processes. The degree of compression of the processes varies on a single specimen; some processes are taeniate, but more commonly they are oblate to subtriangular and are open distally. The distal margin of the processes extends into a variable number of robust secae, sometimes prolonged into fine strands which might connect with those from nearby processes.
Two of the apical processes are considerably smaller than the other two. Cingular and sulcal zones are free of processes. When more than one antapical process occurs, their proximal sections coalesce, forming a corona, which is apparently hollow.
Measurements. Holotype, central body length 51 Ám including operculum (43 Ám not including operculum), breadth 31 Ám; process length 5-15.5 Ám
Range. Central body length 38 49 Ám (not including operculum), breadth 26-31 Ám; process length 5-16 Ám. Specimens measured--8
Affinities:
Liengjarern et al., 1980, p.481: The broad, usually hollow and distally open processes, commonly unconnecled distally, distinguish D. scariosum from other species in the genus.
Holotype: Liengjarern et al., 1980, pl.54, fig.3
Locus typicus: Bouldnor Cliff, Isle of Wight, England
Stratum typicum: Early Oligocene
Original diagnosis: Liengjarern et al., 1980, p.477
Distatodinium with broad, hollow, intratabular processes (usually one per paraplate), oblate to subtriangular in cross-section, distally expanded, and bearing a variable number of thick secae on their distal margin. Cingular area devoid of processes.
Original description: Liengjarern et al., 1980, p.477
The central body ambitus is oval, antero-posteriorly elongate. Apex and antapex are rounded; the antapex may be prolonged into a corona formed by the expanded bases of the antapical processes.
The insertion of the processes on the central body is subcircular, oblate, or triangular. The processes occur one per paraplate, except on the antapical paraplate (1""""), where there may be two or more processes. The degree of compression of the processes varies on a single specimen; some processes are taeniate, but more commonly they are oblate to subtriangular and are open distally. The distal margin of the processes extends into a variable number of robust secae, sometimes prolonged into fine strands which might connect with those from nearby processes.
Two of the apical processes are considerably smaller than the other two. Cingular and sulcal zones are free of processes. When more than one antapical process occurs, their proximal sections coalesce, forming a corona, which is apparently hollow.
Measurements. Holotype, central body length 51 Ám including operculum (43 Ám not including operculum), breadth 31 Ám; process length 5-15.5 Ám
Range. Central body length 38 49 Ám (not including operculum), breadth 26-31 Ám; process length 5-16 Ám. Specimens measured--8
Affinities:
Liengjarern et al., 1980, p.481: The broad, usually hollow and distally open processes, commonly unconnecled distally, distinguish D. scariosum from other species in the genus.