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Lanternosphaeridium reinhardtii
Lanternosphaeridium reinhardtii Moshkovitz and Habib, 1993
Holotype: Moshkovitz and Habib, 1993, pl.5, fig.1a-c
Locus typicus: Braggs roadcut section, Alabama, U.S.A.
Stratum typicum: Early Danian
Original description: Moshkovitz and Habib, 1993, p. 184, 186
Diagnosis: Loosely sheathed proximocavate dinoflagellate cysts. Endocyst rigidly ovoidal, with a prominent, tapering, long apical spike and somewhat shorter antapical spike. Endocyst wall relatively thick (ca. 2 Ám) and not tabulated. It is yellow in color and the surface is smooth or barely scabrate. Pericyst thin (<1 Ám) and distinctly scabrate. It is pale yellow to almost colorless. It is of variable, mostly irregular, shape in most orientations. In dorsoventral compression, the pericyst can be bilaterally symmetrical butterfly-shaped (e.g. holotype) with thin radially pointed folds. Otherwise, it has a nonsymmetrical shape regardless of orientation. In other specimens, the pericyst is sheathed close to the endocyst and displays an incomplete gonyaulacoid tabulation in which 6 postcingular and 6 precingular plates are evident. The pericyst encloses both polar spikes of the endocyst. Pericystal archeopyle rounded hexagonal, broader than high, precingular Type P3"". Endoarcheopyle of same shape and about the same size. Operculum simple and free. Pericystal cingulum evident at the outline by an equatorial indentation; evidence of sulcus lacking. Endocyst without cingulum or sulcus.
Dimensions: holotype: 164x126 Ám, endocyst 157x81 Ám, apical spike 34 Ám long, antapical spike 23 Ám. Values of 20 measured specimens: overall length 143-170 Ám, width 105-126 Ám, endocyst length 139-157 Ám, width 81-111 Ám, apical spike 20-32 Ám, antapical spike 14-25 Ám.
Affinities:
Moshkovitz and Habib, 1993, p. 186: Lanternosphaeridium reinhardtii is distinguished from L. lanosum by its thicker-walled and rigid central body and by the possession of long polar endocystal spikes.
Holotype: Moshkovitz and Habib, 1993, pl.5, fig.1a-c
Locus typicus: Braggs roadcut section, Alabama, U.S.A.
Stratum typicum: Early Danian
Original description: Moshkovitz and Habib, 1993, p. 184, 186
Diagnosis: Loosely sheathed proximocavate dinoflagellate cysts. Endocyst rigidly ovoidal, with a prominent, tapering, long apical spike and somewhat shorter antapical spike. Endocyst wall relatively thick (ca. 2 Ám) and not tabulated. It is yellow in color and the surface is smooth or barely scabrate. Pericyst thin (<1 Ám) and distinctly scabrate. It is pale yellow to almost colorless. It is of variable, mostly irregular, shape in most orientations. In dorsoventral compression, the pericyst can be bilaterally symmetrical butterfly-shaped (e.g. holotype) with thin radially pointed folds. Otherwise, it has a nonsymmetrical shape regardless of orientation. In other specimens, the pericyst is sheathed close to the endocyst and displays an incomplete gonyaulacoid tabulation in which 6 postcingular and 6 precingular plates are evident. The pericyst encloses both polar spikes of the endocyst. Pericystal archeopyle rounded hexagonal, broader than high, precingular Type P3"". Endoarcheopyle of same shape and about the same size. Operculum simple and free. Pericystal cingulum evident at the outline by an equatorial indentation; evidence of sulcus lacking. Endocyst without cingulum or sulcus.
Dimensions: holotype: 164x126 Ám, endocyst 157x81 Ám, apical spike 34 Ám long, antapical spike 23 Ám. Values of 20 measured specimens: overall length 143-170 Ám, width 105-126 Ám, endocyst length 139-157 Ám, width 81-111 Ám, apical spike 20-32 Ám, antapical spike 14-25 Ám.
Affinities:
Moshkovitz and Habib, 1993, p. 186: Lanternosphaeridium reinhardtii is distinguished from L. lanosum by its thicker-walled and rigid central body and by the possession of long polar endocystal spikes.