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Deflandrea cincta
Deflandrea cincta Cookson and Eisenack, 1958
Now Ovoidinium. Originally Deflandrea, subsequently Pocockia, thirdly (and now) Ovoidinium, fourthly Ascodinium. See also Evittia (combination illegitimate).
Holotype: Cookson and Eisenack, 1958, pl.4, fig.3
Locus typicus: Birdrong Formation, W Australia
Stratum typicum: Late Neocomian-Early Aptian
Original description: Cookson and Eisenack, 1958, p. 26
Theca elongated, clearly seperated into an epitheca and hypotheca by a strongly marked transverse girdle, a short longitudinal furrow is situated on the ventral surface of the hypotheca. The epitheca is convex laterally and narrows rather abruptly towards a short terminal truncated horn with a small central projection. The hypotheca is slightly narrower than the epitheca and posteriorly is prolonged on one side into a short, broad, sharply-pointed horn and on the other into a broadly conical expansion. The external membrane is somewhat coarsly granular. The capsule is smooth, broadly oval, and usually extends laterally to the pouter membrane.
Dimensions: Type theca 88x52 µm; capsule 55x40 µm. Range theca 81-118x52-66 µm; capsule 52-66x45-57 µm.
Affinities:
Cookson and Eisenack, 1958, p. 26: Deflandrea cincta althoudh differing from the genotype D. phosphoritica Eis. and other species in having a prominent transverse girdle, is, by its shape, absence of plates and in the presence of an internal capsule, clearly a member of the genus Deflandrea.
Now Ovoidinium. Originally Deflandrea, subsequently Pocockia, thirdly (and now) Ovoidinium, fourthly Ascodinium. See also Evittia (combination illegitimate).
Holotype: Cookson and Eisenack, 1958, pl.4, fig.3
Locus typicus: Birdrong Formation, W Australia
Stratum typicum: Late Neocomian-Early Aptian
Original description: Cookson and Eisenack, 1958, p. 26
Theca elongated, clearly seperated into an epitheca and hypotheca by a strongly marked transverse girdle, a short longitudinal furrow is situated on the ventral surface of the hypotheca. The epitheca is convex laterally and narrows rather abruptly towards a short terminal truncated horn with a small central projection. The hypotheca is slightly narrower than the epitheca and posteriorly is prolonged on one side into a short, broad, sharply-pointed horn and on the other into a broadly conical expansion. The external membrane is somewhat coarsly granular. The capsule is smooth, broadly oval, and usually extends laterally to the pouter membrane.
Dimensions: Type theca 88x52 µm; capsule 55x40 µm. Range theca 81-118x52-66 µm; capsule 52-66x45-57 µm.
Affinities:
Cookson and Eisenack, 1958, p. 26: Deflandrea cincta althoudh differing from the genotype D. phosphoritica Eis. and other species in having a prominent transverse girdle, is, by its shape, absence of plates and in the presence of an internal capsule, clearly a member of the genus Deflandrea.