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Lanternosphaeridium reinhardtii
From Fensome et al., 2019:
Lanternosphaeridium reinhardtii Habib in Moshkovitz and Habib, 1993, p.184,186, pl.5, figs.1a–c,2,3a–b,4a–b. Holotype: Moshkovitz and Habib, 1993, pl.5, figs.1a–c. Age: early Danian.
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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 µm) and not tabulated. It is yellow in color and the surface is smooth or barely scabrate. Pericyst thin (<1 µm) 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 µm, endocyst 157x81 µm, apical spike 34 µm long, antapical spike 23 µm. Values of 20 measured specimens: overall length 143-170 µm, width 105-126 µm, endocyst length 139-157 µm, width 81-111 µm, apical spike 20-32 µm, antapical spike 14-25 µm.
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.
Lanternosphaeridium reinhardtii Habib in Moshkovitz and Habib, 1993, p.184,186, pl.5, figs.1a–c,2,3a–b,4a–b. Holotype: Moshkovitz and Habib, 1993, pl.5, figs.1a–c. Age: early Danian.
---------------------------------------------------------------------------------------------------
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 µm) and not tabulated. It is yellow in color and the surface is smooth or barely scabrate. Pericyst thin (<1 µm) 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 µm, endocyst 157x81 µm, apical spike 34 µm long, antapical spike 23 µm. Values of 20 measured specimens: overall length 143-170 µm, width 105-126 µm, endocyst length 139-157 µm, width 81-111 µm, apical spike 20-32 µm, antapical spike 14-25 µm.
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.