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Deflandrea tuberculata
Deflandrea tuberculata Hultberg, 1985
Holotype: Hultberg, 1985, pl.3, fig.A-C
Locus typicus: Limhamn area, southern Sweden
Stratum typicum: Late Maastrichtian
Original description: Hultberg,, 1985, p. 120
The cyst is apically cornucavate and antapically hypocavate. The surface of the endophragm is smooth. The surface of the periphragm is striate and strongly tuberculate. The shape of the endophragm is spherical. The periphragm is peridinioid, with one, sharply pointed apical horn, and two almost symmetrical antapical horns. The margins of the periphragm are serrate. Paratabulation is indicated by parasutural lineations and intratabular groups of tubercles. The tubercles may form parasutural crests. The paratabulation is peridiniacean, paratabulation formula: 4", 3a, 7"", xc, 5""", 2"""". The archeopyle is intercalary, type I, formed by the detachment of paraplate 2a. Operculum free. The archeopyle is broad and has a triangular appearance, although being hexagonal. Paracingulum is clearly discernible by folds in the periphragm, parasutural arrangement of tubercles, and lineations on the margins of the paracingulum. One line of tubercles is present in the center of the paracingulum. Parasulcus is indicated by a depression in the midventral part of the periphragm. A bulge is present in the lower right part of the parasulcus. Size - 118-130 Ám (length), 72-79 Ám (breadth).
Affinities:
Hultberg, 1985, p. 121: Deflandrea tuberculata can be distinguished from other species by the surface morphology of the periphragm, consisting of a combination of parasutural and intratabular tubercles, and striation in the periphragm.
Holotype: Hultberg, 1985, pl.3, fig.A-C
Locus typicus: Limhamn area, southern Sweden
Stratum typicum: Late Maastrichtian
Original description: Hultberg,, 1985, p. 120
The cyst is apically cornucavate and antapically hypocavate. The surface of the endophragm is smooth. The surface of the periphragm is striate and strongly tuberculate. The shape of the endophragm is spherical. The periphragm is peridinioid, with one, sharply pointed apical horn, and two almost symmetrical antapical horns. The margins of the periphragm are serrate. Paratabulation is indicated by parasutural lineations and intratabular groups of tubercles. The tubercles may form parasutural crests. The paratabulation is peridiniacean, paratabulation formula: 4", 3a, 7"", xc, 5""", 2"""". The archeopyle is intercalary, type I, formed by the detachment of paraplate 2a. Operculum free. The archeopyle is broad and has a triangular appearance, although being hexagonal. Paracingulum is clearly discernible by folds in the periphragm, parasutural arrangement of tubercles, and lineations on the margins of the paracingulum. One line of tubercles is present in the center of the paracingulum. Parasulcus is indicated by a depression in the midventral part of the periphragm. A bulge is present in the lower right part of the parasulcus. Size - 118-130 Ám (length), 72-79 Ám (breadth).
Affinities:
Hultberg, 1985, p. 121: Deflandrea tuberculata can be distinguished from other species by the surface morphology of the periphragm, consisting of a combination of parasutural and intratabular tubercles, and striation in the periphragm.