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Impagidinium membranigerum
Impagidinium? membranigerum (Gerlach, 1961) Stover and Evitt 1978
Now Leptodinium. Originally (and now) Leptodinium, subsequently Impagidinium?.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Impagidinium.
Holotype: Gerlach 1961, pl.26, fig. 1-3 (lost according to Sarjeant, 1984)
Lectotype: Gerlach, 1961, pl.26, fig.7, text-fig.5; Sarjeant, 1984, pl.1, figs.1,3, text-figs.1A-B; Jan du Chêne et al., 1986, pl.67, figs.17-18 (designated by Sarjeant, 1984)
Locus typicus: Emsb³ren boring no. 7, NW Germany
Stratum typicum: Late Oligocene
Translation Gerlach, 1961: Sarjeant, 1984
Original diagnosis: Gerlach, 1961, p. 162-163: Leptodinium membranigerum
A species of the genusLeptodinium with oval theca. Tabulation formula as given in the generic diagnosis; 4", 6", 5""", 1p and 1"""". Epitheca larger and more elongate than the rounded hypotheca. Girdle furrow spiral, formed of six plates. Offset of its ends somewhat more than a furrow breadth. Longitudinal furrow wholly undifferentiated. Sutures of plates marked by low hyaline crests, shell membrane appearing to bear a thornlike point at the position of convergence of two crests. Plates finely granulate, membrane relatively thin.
Now Leptodinium. Originally (and now) Leptodinium, subsequently Impagidinium?.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Impagidinium.
Holotype: Gerlach 1961, pl.26, fig. 1-3 (lost according to Sarjeant, 1984)
Lectotype: Gerlach, 1961, pl.26, fig.7, text-fig.5; Sarjeant, 1984, pl.1, figs.1,3, text-figs.1A-B; Jan du Chêne et al., 1986, pl.67, figs.17-18 (designated by Sarjeant, 1984)
Locus typicus: Emsb³ren boring no. 7, NW Germany
Stratum typicum: Late Oligocene
Translation Gerlach, 1961: Sarjeant, 1984
Original diagnosis: Gerlach, 1961, p. 162-163: Leptodinium membranigerum
A species of the genusLeptodinium with oval theca. Tabulation formula as given in the generic diagnosis; 4", 6", 5""", 1p and 1"""". Epitheca larger and more elongate than the rounded hypotheca. Girdle furrow spiral, formed of six plates. Offset of its ends somewhat more than a furrow breadth. Longitudinal furrow wholly undifferentiated. Sutures of plates marked by low hyaline crests, shell membrane appearing to bear a thornlike point at the position of convergence of two crests. Plates finely granulate, membrane relatively thin.