Back
Peridinium pyrophorum
Peridinium pyrophorum Ehrenberg, 1838
Now Palaeoperidinium. Originally Peridinium, subsequently (and now) Palaeoperidinium.
Tax. sr. synonym of Palaeoperidinium basilium (Drugg, 1967) Drugg, 1970, according to Stover and Evitt, 1978.
Tax. sr. synonym of Palaeoperidinium deflandrei Lentin and Williams, 1973, according to Stover and Evitt, 1978.
Tax. sr. synonym of Pentagonum marginatum Vozzhennikova, 1967, according to Lentin and Vozzhennikova, 1990.
Tax. sr. synonym of Pentagonum sibiricum Vozzhennikova, 1967, according to Lentin and Vozzhennikova 1990.
Tax. sr. synonym of Palaeoperidinium larjakiense (Vozzhennikova, 1967) Lentin and Williams, 1981, according to Lentin and Vozzhennikova, 1990.
Holotype: Sarjeant, 1967, fig.3
Locus typicus: Delitzsch, Saxony, Germany
Stratum typicum: Late Cretaceous
Translation Lejeune-Carpentier, 1938: LPP
Original description: Ehrenberg, 1838, p. 110: Peridinium? (Glenodiniuim?) pyrophorum
New diagnosis: Lejeune-Carpentier, 1938, p.3: Peridinium pyrophorum
Theca, in ventral view, presenting a quite rounded outline, the hypotheca and even more the epitheca appearing clearly domed. A marked dorsoventral flattening.
A rather pronounced apical horn, broad at the base and blunt at the tip. Antapical horns, both swollen at the bases, the extremity of the left one elongate, the right one appearing so much the shorter, because it is slightly recurved ventrally.
Girdle: equatorial, hardly spiral, laevorotatoy, with marked borders especially at the hypotheca.
Anterior plate of ventral area ("sulcus") reaching well into the epitheca, the posterior plate hollowed into a straight groove, recurved at its extremity, curved to the right and fading into a beak. This depression halts at some distance from the antapical pole.
Tabulation: 4", 3a, 7"", 5""", 2"""". 1" diamond shaped, at the apex of which an apical pore opens, in contact with with two apicals: 2" and 4" and with two preequatorials: 1"" and 7"". Intercalaries 1a and 3a extending to the tip of the apical horn. 2a hexagonal. The sutures between plates 1" and 2" on one side, and 1"" and 2"" on the other side (just like the similar ones on the other side) forming a jagged line.
Preequatorial 1"" somewhat longer than 7"". Asymmetry of the hypotheca much more pronounced. Postequatorial 1""" descending only onto the middle of the distance between the girdle and the left antapical horn, while 5""" reaches the point where the right antapical horn thickens. Posterior 1"""" longer but less wide than 2"""".
Theca, appearing very thin, presents a marked sculpture over the entire surface, polygonal areolae succeeding each other, in certain places, in such a way, that, at low magnification, they give the impression of irreular lines.
Dimensions(in µm): Holotype: Length (including horns) 92; width (at the level of the furrow of the girdle) 68; idem (including the edges of the girdle) 74
Now Palaeoperidinium. Originally Peridinium, subsequently (and now) Palaeoperidinium.
Tax. sr. synonym of Palaeoperidinium basilium (Drugg, 1967) Drugg, 1970, according to Stover and Evitt, 1978.
Tax. sr. synonym of Palaeoperidinium deflandrei Lentin and Williams, 1973, according to Stover and Evitt, 1978.
Tax. sr. synonym of Pentagonum marginatum Vozzhennikova, 1967, according to Lentin and Vozzhennikova, 1990.
Tax. sr. synonym of Pentagonum sibiricum Vozzhennikova, 1967, according to Lentin and Vozzhennikova 1990.
Tax. sr. synonym of Palaeoperidinium larjakiense (Vozzhennikova, 1967) Lentin and Williams, 1981, according to Lentin and Vozzhennikova, 1990.
Holotype: Sarjeant, 1967, fig.3
Locus typicus: Delitzsch, Saxony, Germany
Stratum typicum: Late Cretaceous
Translation Lejeune-Carpentier, 1938: LPP
Original description: Ehrenberg, 1838, p. 110: Peridinium? (Glenodiniuim?) pyrophorum
New diagnosis: Lejeune-Carpentier, 1938, p.3: Peridinium pyrophorum
Theca, in ventral view, presenting a quite rounded outline, the hypotheca and even more the epitheca appearing clearly domed. A marked dorsoventral flattening.
A rather pronounced apical horn, broad at the base and blunt at the tip. Antapical horns, both swollen at the bases, the extremity of the left one elongate, the right one appearing so much the shorter, because it is slightly recurved ventrally.
Girdle: equatorial, hardly spiral, laevorotatoy, with marked borders especially at the hypotheca.
Anterior plate of ventral area ("sulcus") reaching well into the epitheca, the posterior plate hollowed into a straight groove, recurved at its extremity, curved to the right and fading into a beak. This depression halts at some distance from the antapical pole.
Tabulation: 4", 3a, 7"", 5""", 2"""". 1" diamond shaped, at the apex of which an apical pore opens, in contact with with two apicals: 2" and 4" and with two preequatorials: 1"" and 7"". Intercalaries 1a and 3a extending to the tip of the apical horn. 2a hexagonal. The sutures between plates 1" and 2" on one side, and 1"" and 2"" on the other side (just like the similar ones on the other side) forming a jagged line.
Preequatorial 1"" somewhat longer than 7"". Asymmetry of the hypotheca much more pronounced. Postequatorial 1""" descending only onto the middle of the distance between the girdle and the left antapical horn, while 5""" reaches the point where the right antapical horn thickens. Posterior 1"""" longer but less wide than 2"""".
Theca, appearing very thin, presents a marked sculpture over the entire surface, polygonal areolae succeeding each other, in certain places, in such a way, that, at low magnification, they give the impression of irreular lines.
Dimensions(in µm): Holotype: Length (including horns) 92; width (at the level of the furrow of the girdle) 68; idem (including the edges of the girdle) 74