Back
Palaeocystodinium denticulatum
From Fensome et al., 2019:
Palaeocystodinium? denticulatum Alberti, 1961, p.20–21, pl.7, fig.9. Holotype: Alberti, 1961, pl.7, fig.9. Questionable assignment:
Alberti (1961, p.20). Age: Turonian.
---------------------------------------------------------------------------------------------------
Original description: [Alberti, 1961] (translated from German):
Palaeocystodinium denticulatum n. sp.
Plate 7, Fig. 9
Holotype: The specimen preserved in preparation no. A 17 and shown on Plate 7, Fig. 9.
Type locality: Waddekath borehole.
Type stratum: Turonian.
Diagnosis: Body dorsoventrally flattened, spindle-shaped. Apical horny process somewhat more distinct from the central part and shorter than the antapic one. Both taper towards their free end. On their surface are fine ribs running parallel to the longitudinal axis, which are toothed in the terminal section. A rounded-rectangular emergence hole is located below the apex. Inner body probably present
Additions: The body membrane is yellowish-brown and translucent. It could not be determined with certainty whether an inner body is always present. The surface of the horn-like processes bears fine ribs running parallel to the longitudinal axis of the body, which are sometimes toothed along their entire length, but mostly only in the terminal section of the horn-like processes.
Relationships: Palaeocystodinium denticulatum n. sp. is reminiscent in shape of the forms of "Ceratium cf. fusus EHRENBERG" described and illustrated by O. Wetzel (1933, p. 168, pl. 2, figs. 17-20).
O. WETZEL already notes (p. 169) that the forms in which the girdle groove is indistinct show a similarity to cystodinia. An assignment to the genus Ceratium SCHRANK is out of the question due to the completely different characteristics.
Since the internal body could not always be reliably identified, the assignment to the genus Palacocystodinium n. gen. also appears questionable. Similarities seem to exist with Kalyptea Cooks. & Eis.
Dimensions of the holotype: length 236 μ, width 70 μ. In other specimens, the length varies between 228 μ and 246 μ, the width between 68 μ and 74 μ.
Material: 5 specimens (partly damaged).
Occurrence: Turonian of the Waddekath bore.
Palaeocystodinium? denticulatum Alberti, 1961, p.20–21, pl.7, fig.9. Holotype: Alberti, 1961, pl.7, fig.9. Questionable assignment:
Alberti (1961, p.20). Age: Turonian.
---------------------------------------------------------------------------------------------------
Original description: [Alberti, 1961] (translated from German):
Palaeocystodinium denticulatum n. sp.
Plate 7, Fig. 9
Holotype: The specimen preserved in preparation no. A 17 and shown on Plate 7, Fig. 9.
Type locality: Waddekath borehole.
Type stratum: Turonian.
Diagnosis: Body dorsoventrally flattened, spindle-shaped. Apical horny process somewhat more distinct from the central part and shorter than the antapic one. Both taper towards their free end. On their surface are fine ribs running parallel to the longitudinal axis, which are toothed in the terminal section. A rounded-rectangular emergence hole is located below the apex. Inner body probably present
Additions: The body membrane is yellowish-brown and translucent. It could not be determined with certainty whether an inner body is always present. The surface of the horn-like processes bears fine ribs running parallel to the longitudinal axis of the body, which are sometimes toothed along their entire length, but mostly only in the terminal section of the horn-like processes.
Relationships: Palaeocystodinium denticulatum n. sp. is reminiscent in shape of the forms of "Ceratium cf. fusus EHRENBERG" described and illustrated by O. Wetzel (1933, p. 168, pl. 2, figs. 17-20).
O. WETZEL already notes (p. 169) that the forms in which the girdle groove is indistinct show a similarity to cystodinia. An assignment to the genus Ceratium SCHRANK is out of the question due to the completely different characteristics.
Since the internal body could not always be reliably identified, the assignment to the genus Palacocystodinium n. gen. also appears questionable. Similarities seem to exist with Kalyptea Cooks. & Eis.
Dimensions of the holotype: length 236 μ, width 70 μ. In other specimens, the length varies between 228 μ and 246 μ, the width between 68 μ and 74 μ.
Material: 5 specimens (partly damaged).
Occurrence: Turonian of the Waddekath bore.