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Ovoidinium cinctum
Ovoidinium cinctum (Cookson and Eisenack, 1958) Davey, 1970
Originally Deflandrea, subsequently Evittia Pocock (combination illegitimate), thirdly Pocockia, fourthly (and now) Ovoidinium, fifthly Ascodinium. Lentin and Williams (1989, p.269) retained this species in Ovoidinium.
Holotype: Cookson and Eisenack, 1958, pl.4, fig.3
Locus typicus: Birdrong Formation, W Australia
Stratum typicum: Late Neocomian-Early Aptian
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Ovoidinium cinctum (Cookson and Eisenack, 1958) Davey, 1970. Ovoidinium cinctum has a well developed cingulum. There is a short apical horn with a short central projection and a pointed left antapical horn. Size: pericyst length 81-118 µm, width 52-66 µm, endocyst length 52-66 µm, width 45-57 µm.
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Original description: Cookson and Eisenack, 1958, p. 26: Deflandrea cincta
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 88 x 52 Ám; capsule 55 x 40 Ám. Range - theca 81-118 x 52-66 Ám; capsule 52-66 x 45-57 Ám.
Affinities:
Cookson and Eisenack, 1958, p. 26: Deflandrea cincta
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.
Originally Deflandrea, subsequently Evittia Pocock (combination illegitimate), thirdly Pocockia, fourthly (and now) Ovoidinium, fifthly Ascodinium. Lentin and Williams (1989, p.269) retained this species in Ovoidinium.
Holotype: Cookson and Eisenack, 1958, pl.4, fig.3
Locus typicus: Birdrong Formation, W Australia
Stratum typicum: Late Neocomian-Early Aptian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Ovoidinium cinctum (Cookson and Eisenack, 1958) Davey, 1970. Ovoidinium cinctum has a well developed cingulum. There is a short apical horn with a short central projection and a pointed left antapical horn. Size: pericyst length 81-118 µm, width 52-66 µm, endocyst length 52-66 µm, width 45-57 µm.
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Original description: Cookson and Eisenack, 1958, p. 26: Deflandrea cincta
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 88 x 52 Ám; capsule 55 x 40 Ám. Range - theca 81-118 x 52-66 Ám; capsule 52-66 x 45-57 Ám.
Affinities:
Cookson and Eisenack, 1958, p. 26: Deflandrea cincta
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.