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Pareodinia antennata
Pareodinia antennata (Gitmez and Sarjeant, 1972) Wiggins, 1975
Now Gochteodinia. Originally Imbatodinium, subsequently Pareodinia, thirdly (and now) Gochteodinia.
Holotype: Gitmez and Sarjeant, 1972, pl. 11, fig. 3
Paratype: Gitmez and Sarjeant, 1972, pl. 11, fig. 2
Locus typicus: Warlingham, Surrey, England
Stratum typicum: Kimmeridgian
Original diagnosis: Gitmez and Sarjeant, 1972, p. 232-233: Imbatodinium antennatum
A proximate cyst, elongate to ovoidal in shape, with a strong apical horn. On the distal end of the horn, there is a thread-like projection of variable length ending in a small knob. In some cases, a cingulum is weakly developed; but there is no indication tabulation or sulcus. The surface of the cyst is granular. An intercalary archaeopyle is often developed.
Original description: Gitmez and Sarjeant, 1972, p.232: Imbatodinium antennatum
The cyst is elongate, broadening in the posterior median region. The apical horn is well developed, bearing a thread-like process of variable length, generally between half and one-third of the overall horn length. This thread-like process ends in a small bulge, which appears as a knob. The cingulum is only weakly developed, but may be suggested by faint surface marking. The epitract is longer than the hypotract, comprising almost two-thirds of the overall length.
Dimensions:
Holotype: overall length 73 µm, breadth 35 µm, apical horn length without projection 9 µm, with projection 16 µm. Range of the observed specimens (16 in number): overall length 62-100 µm, breadth 28-50 µm, overall length of horn 12-30µm, horn length without projection 7-16 µm, length of the projection 4-14 µm.
Affinities:
Gitmez and Sarjeant, 1972, p. 233: Imbatodinium antennatum
This new species of Imbatodinium is distinguihed from the previously described species in tis general shape, presence of an intercalary archaeopyle and characteristic shape of the apical horn. In horn shape, it is similar to I. villosum, which was recorded from the Upper Jurassic of Russia by Vozzhennikova, but it differs from I. villosum in the absence of the sutural spines distributed all over the surface.
Now Gochteodinia. Originally Imbatodinium, subsequently Pareodinia, thirdly (and now) Gochteodinia.
Holotype: Gitmez and Sarjeant, 1972, pl. 11, fig. 3
Paratype: Gitmez and Sarjeant, 1972, pl. 11, fig. 2
Locus typicus: Warlingham, Surrey, England
Stratum typicum: Kimmeridgian
Original diagnosis: Gitmez and Sarjeant, 1972, p. 232-233: Imbatodinium antennatum
A proximate cyst, elongate to ovoidal in shape, with a strong apical horn. On the distal end of the horn, there is a thread-like projection of variable length ending in a small knob. In some cases, a cingulum is weakly developed; but there is no indication tabulation or sulcus. The surface of the cyst is granular. An intercalary archaeopyle is often developed.
Original description: Gitmez and Sarjeant, 1972, p.232: Imbatodinium antennatum
The cyst is elongate, broadening in the posterior median region. The apical horn is well developed, bearing a thread-like process of variable length, generally between half and one-third of the overall horn length. This thread-like process ends in a small bulge, which appears as a knob. The cingulum is only weakly developed, but may be suggested by faint surface marking. The epitract is longer than the hypotract, comprising almost two-thirds of the overall length.
Dimensions:
Holotype: overall length 73 µm, breadth 35 µm, apical horn length without projection 9 µm, with projection 16 µm. Range of the observed specimens (16 in number): overall length 62-100 µm, breadth 28-50 µm, overall length of horn 12-30µm, horn length without projection 7-16 µm, length of the projection 4-14 µm.
Affinities:
Gitmez and Sarjeant, 1972, p. 233: Imbatodinium antennatum
This new species of Imbatodinium is distinguihed from the previously described species in tis general shape, presence of an intercalary archaeopyle and characteristic shape of the apical horn. In horn shape, it is similar to I. villosum, which was recorded from the Upper Jurassic of Russia by Vozzhennikova, but it differs from I. villosum in the absence of the sutural spines distributed all over the surface.