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Ovoidinium kansanum
Ovoidinium? kansanum (Tasch, 1964) Lentin and Williams, 1976
Originally Peridinium, subsequently Deflandrea?, thirdly (and now) Ovoidinium?, fourthly Ascodinium?.
Lentin and Williams, 1985, questionably transferred this species to Ascodinium Cookson and Eisenack, 1960. Lentin and Williams, 1989, p.270) questionably retained it in Ovoidinium.
At the time of the transfer, Lentin and Williams, 1976, questionably included this species in Ovoidinium.
Holotype: Tasch, 1964, pl.1, fig.1
Age: Albian
Original description (Tasch, 1964)
Diagnosis: General polygonal configuration of theca; wide equatorial band separating broadly expanded hypotheca from more tapered epitheca; continuous uncurved posterior plate terminating et either end in two pointed projections (antapical horns). Plate system poorly defined.
Measurements: Length (excl. horns), 48 µm; width along girdle, 40 µm; width of girdle, 7 µm; distance between centers of antapical horns, 20 µm; length of horns, 12 µm.
Discussions: The triangular apical indentation correstonds to a missing apical plate (“apical archeopyle” of Evitt). The uncurved posterior plate bearing pointed projections or horns distinguishes the new species.
Holotype: WU-DF 0168. Slide no. 1024. Coordinates: R 21.5, D. 12.5.
Locality: Sampling interval 4-I-J.
Originally Peridinium, subsequently Deflandrea?, thirdly (and now) Ovoidinium?, fourthly Ascodinium?.
Lentin and Williams, 1985, questionably transferred this species to Ascodinium Cookson and Eisenack, 1960. Lentin and Williams, 1989, p.270) questionably retained it in Ovoidinium.
At the time of the transfer, Lentin and Williams, 1976, questionably included this species in Ovoidinium.
Holotype: Tasch, 1964, pl.1, fig.1
Age: Albian
Original description (Tasch, 1964)
Diagnosis: General polygonal configuration of theca; wide equatorial band separating broadly expanded hypotheca from more tapered epitheca; continuous uncurved posterior plate terminating et either end in two pointed projections (antapical horns). Plate system poorly defined.
Measurements: Length (excl. horns), 48 µm; width along girdle, 40 µm; width of girdle, 7 µm; distance between centers of antapical horns, 20 µm; length of horns, 12 µm.
Discussions: The triangular apical indentation correstonds to a missing apical plate (“apical archeopyle” of Evitt). The uncurved posterior plate bearing pointed projections or horns distinguishes the new species.
Holotype: WU-DF 0168. Slide no. 1024. Coordinates: R 21.5, D. 12.5.
Locality: Sampling interval 4-I-J.