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Tubidermodinium sulcatum
Tubidermodinium sulcatum Morgenroth, 1966
Holotype: Morgenroth, 1966a: Pl. 3, fig. 4
Locus typicus: Katharinenhof Fehmarn.
Stratum typicum: Lower Eocene (?2).
Age: Early Eocene
Translation Morgenroth, 1966a: GSC
Original diagnosis: Morgenroth, 1966a, p.16-17 Tubidermodinium sulcatum
See genus diagnosis.
Original description: Morgenroth, 1966a, p.16-17 Tubidermodinium sulcatum
The round polarly flattened central body has a relatively thick wall, whose outer surface is generally clearly granulate. From the capsule surface arise numerous very slender and very short tubercles that are distally expanded (widened) and are interconnected by a thin membrane. This forms an entire unbroken concentric outer shell that is perforated at the numerous connections with the central body.
A number of specimens show on the central capsule a more or less indeterminate tabulation. The delineation of the plate borders is shown by tubercle free bands. At the poles there is a pentagonal plate. Each is framed by 5 trapezoid plates which are separated from each other at the equator by the transverse furrow. A longitudinal furrow could not be proven with certainty - In the majority of specimens mentioned above, the tabulation cannot be recognized: the girdle, however, is always present on the outer membrane as a circular depression. The common occurrence of isolated epitheca and hypotheca seems to indicate a parting along the length of the transverse furrow.
Measurements: Capsule length: 43 microns (39/47 microns) capsule breadth: 41 microns (36/47 microns), specimen length: 49 microns (42/59 microns), specimen breadth: 45 microns (36/50 microns). Distance between central capsule and outer shell approximately 2-3 microns (maximum-7 microns) (100 measurements). Number of specimens examined: 256.
Holotype: Morgenroth, 1966a: Pl. 3, fig. 4
Locus typicus: Katharinenhof Fehmarn.
Stratum typicum: Lower Eocene (?2).
Age: Early Eocene
Translation Morgenroth, 1966a: GSC
Original diagnosis: Morgenroth, 1966a, p.16-17 Tubidermodinium sulcatum
See genus diagnosis.
Original description: Morgenroth, 1966a, p.16-17 Tubidermodinium sulcatum
The round polarly flattened central body has a relatively thick wall, whose outer surface is generally clearly granulate. From the capsule surface arise numerous very slender and very short tubercles that are distally expanded (widened) and are interconnected by a thin membrane. This forms an entire unbroken concentric outer shell that is perforated at the numerous connections with the central body.
A number of specimens show on the central capsule a more or less indeterminate tabulation. The delineation of the plate borders is shown by tubercle free bands. At the poles there is a pentagonal plate. Each is framed by 5 trapezoid plates which are separated from each other at the equator by the transverse furrow. A longitudinal furrow could not be proven with certainty - In the majority of specimens mentioned above, the tabulation cannot be recognized: the girdle, however, is always present on the outer membrane as a circular depression. The common occurrence of isolated epitheca and hypotheca seems to indicate a parting along the length of the transverse furrow.
Measurements: Capsule length: 43 microns (39/47 microns) capsule breadth: 41 microns (36/47 microns), specimen length: 49 microns (42/59 microns), specimen breadth: 45 microns (36/50 microns). Distance between central capsule and outer shell approximately 2-3 microns (maximum-7 microns) (100 measurements). Number of specimens examined: 256.