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Deflandrea subquadra
Deflandrea subquadra Corradini, 1973
Now Cerodinium. Originally Deflandrea, subsequently Senegalinium?, thirdly (and now) Cerodinium. See also Ceratiopsis (combination illegitimate).
Holotype: Corradini, 1973, pl.28, fig.1
Locus typicus: Viano, Reggio Emilia, Italy
Stratum typicum: Senonian
Original diagnosis: Corradini, 1973, p. 176
Dinoflagellate cyst having a more or less triangular epitract and a wide rectangular hypotract. Large apical horn with broad base; antapical horns relatively little developed. Inner capsule subcircular to subquadrate in outline, normally in contact with the outer wall. Archeopyle intercalary.
Dimensions: Holotype: diameter of the inner capsule 60x65 Ám, width of the cyst 74 Ám, overall length 143 Ám. Range: diameter of the inner capsule 55-60x60-65 Ám, width of the cyst 72-75 Ám, overall length 115-143 Ám.
Original description: Corradini, 1973, p. 176
The test is flattened dorso-ventrally and is composed of a thick smooth endophragm and of an irregularly punctate or vermiculate, thin periphragm. The inner body possesses a slightly thick wall while the outer membrane is thinner.
The sides of the triangular epitract are sometimes partially convex but normally rectilinear.
Apical horn with broad base tapering to the blunt apex with the same inclination as the sides of the epitract. The hypotract is less wide than the cingulum and almost quadrangular in shape.
The antapical horns, fairly well developed, are distally blunted and well separated, their axes being straight diverging. Cingulum and sulcus well developed, but the latter only on the hypotract. Large intercalary archeopyle.
Now Cerodinium. Originally Deflandrea, subsequently Senegalinium?, thirdly (and now) Cerodinium. See also Ceratiopsis (combination illegitimate).
Holotype: Corradini, 1973, pl.28, fig.1
Locus typicus: Viano, Reggio Emilia, Italy
Stratum typicum: Senonian
Original diagnosis: Corradini, 1973, p. 176
Dinoflagellate cyst having a more or less triangular epitract and a wide rectangular hypotract. Large apical horn with broad base; antapical horns relatively little developed. Inner capsule subcircular to subquadrate in outline, normally in contact with the outer wall. Archeopyle intercalary.
Dimensions: Holotype: diameter of the inner capsule 60x65 Ám, width of the cyst 74 Ám, overall length 143 Ám. Range: diameter of the inner capsule 55-60x60-65 Ám, width of the cyst 72-75 Ám, overall length 115-143 Ám.
Original description: Corradini, 1973, p. 176
The test is flattened dorso-ventrally and is composed of a thick smooth endophragm and of an irregularly punctate or vermiculate, thin periphragm. The inner body possesses a slightly thick wall while the outer membrane is thinner.
The sides of the triangular epitract are sometimes partially convex but normally rectilinear.
Apical horn with broad base tapering to the blunt apex with the same inclination as the sides of the epitract. The hypotract is less wide than the cingulum and almost quadrangular in shape.
The antapical horns, fairly well developed, are distally blunted and well separated, their axes being straight diverging. Cingulum and sulcus well developed, but the latter only on the hypotract. Large intercalary archeopyle.