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Subtilidinium minutum
Subtilidinium minutum Morgenroth, 1968
Originally (and now) Subtilidinium, subsequently Phanerodinium. Below, 1987
transferred this species to Phanerodinium Deflandre, 1937; however, Lentin and Williams, 1989 retained it in Subtilidinium.
Holotype: Morgenroth 1968: Plate 42, fig. 8,9
Locus typicus: Mönsted near Viborg/Jutland
Stratum typicum: Danian A
Age: Danian
Translation Morgenroth 1968: GSC
Original diagnosis (complementary to diagnosis of genus): Morgenroth 1968, p.7: Subtilidinium minutum
The theca is small, thin-walled and elipsoidal. The theca surface is smooth. The borders of the plates are marked by low seams with smooth edges. The number of apical plates could not be accurately determined since in all specimens the apical polar cap is missing. The plate 1", however, although not always clearly delineated, is always located in the extension of the longitudinal groove. ?6 intercalary plates (the exact number cannot be determined with certainty because of the small size of the objects) are located between the apical and the pre-equatorial plates; (their arrangement can be seen in text-figures 3,4). Above the girdle are found 6 elongated, mostly hexagonal pre-equatorial plates. The broad girdle is differentiated by 6 plates which extend in the direction of the girdle. Six trapezoidal post-equatorial plates (1""" and 2""" are relatively small, 3""" to 6""", however, are larger), one intercalary plate located below 1""" and a hexagonal plate follow on the hypotheca. The exact arrangement of the plates can be seen in fig. 3 and 4.
Dimensions:
Length of theca: 16.5 µm (14µm/19µm)
Width of theca: 14 µm (11µm/16µm) 50 measurements
Number of specimens examined: 63
Originally (and now) Subtilidinium, subsequently Phanerodinium. Below, 1987
transferred this species to Phanerodinium Deflandre, 1937; however, Lentin and Williams, 1989 retained it in Subtilidinium.
Holotype: Morgenroth 1968: Plate 42, fig. 8,9
Locus typicus: Mönsted near Viborg/Jutland
Stratum typicum: Danian A
Age: Danian
Translation Morgenroth 1968: GSC
Original diagnosis (complementary to diagnosis of genus): Morgenroth 1968, p.7: Subtilidinium minutum
The theca is small, thin-walled and elipsoidal. The theca surface is smooth. The borders of the plates are marked by low seams with smooth edges. The number of apical plates could not be accurately determined since in all specimens the apical polar cap is missing. The plate 1", however, although not always clearly delineated, is always located in the extension of the longitudinal groove. ?6 intercalary plates (the exact number cannot be determined with certainty because of the small size of the objects) are located between the apical and the pre-equatorial plates; (their arrangement can be seen in text-figures 3,4). Above the girdle are found 6 elongated, mostly hexagonal pre-equatorial plates. The broad girdle is differentiated by 6 plates which extend in the direction of the girdle. Six trapezoidal post-equatorial plates (1""" and 2""" are relatively small, 3""" to 6""", however, are larger), one intercalary plate located below 1""" and a hexagonal plate follow on the hypotheca. The exact arrangement of the plates can be seen in fig. 3 and 4.
Dimensions:
Length of theca: 16.5 µm (14µm/19µm)
Width of theca: 14 µm (11µm/16µm) 50 measurements
Number of specimens examined: 63