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Alterbia polymorpha
Andalusiella polymorpha, (Malloy, 1972), Lentin and Williams, 1976
Combination illegitimate: the generic name Alterbia is illegitimate.
Tax. sr. synonym of Palaeocystodinium microgranulatum Jain and Millepied, 1973,
Palaeocystodinium punctatum Jain and Millepied, 1973, and of Senegalinium trisinum Jain and Millepied, 1973, according to Lentin and Williams, 1976. Schrank, 1987, retained Palaeocystodinium punctatum as the subspecies Andalusiella polymorpha subsp. punctatum.
Tax. sr. synonym of Andalusiella mauthei Riegel, 1974, according to Lentin and Williams, 1976. Lentin and Williams, 1977b retained Andalusiella mauthei as a separate species.
Holotype: Malloy, 1972, pl.1, fig.15
Locus typicus: Gabon GLA IX well, Gabon Republic, West Africa
Stratum typicum: Maastrichtian
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Original description as Svalbardella polymorpha: [Malloy, 1972, p. 63]:
Diagnosis:
Cyst fusiform, with a thin-walled outer cyst and an inner thicker-walled cyst, periphragm closely appressed to endophragm. The outer cyst displays a single apical horn and two distinct antapical horns. Both lengths and placement of the antapical horns are variable, with separation of the two sometimes equal to their lengths but often only minor. Antapical horns are usually unequal in length, with the shorter 1/2 to 1/3 the length of its neighbor. The short antapical horn, in some cases, may arise from the periphragm (or cyst margin in equatorial view) well away from and above the basal (proximal) contact of the longer antapical. Tips of both apical and antapical horns are either acute or blunted. As described for S . australina (revised), the apical and antapical portions are complex in structure (Text-fig. 2).
The archeopyle is hexagonal, intercalary, and identical to that of S. australina in relative size and outline. All but one specimen examined showed no indications of tabulation. This individual exhibited a pattern of folding involving both periphragm and endophragm, apparently related to tabulation but poorly preserved. No clear indications of a girdle or sulcus are present; however transverse median folding suggests the location of an equatorial structure.
Dimensions:
length 90 µm; width 38 µm to 77 µm.
Combination illegitimate: the generic name Alterbia is illegitimate.
Tax. sr. synonym of Palaeocystodinium microgranulatum Jain and Millepied, 1973,
Palaeocystodinium punctatum Jain and Millepied, 1973, and of Senegalinium trisinum Jain and Millepied, 1973, according to Lentin and Williams, 1976. Schrank, 1987, retained Palaeocystodinium punctatum as the subspecies Andalusiella polymorpha subsp. punctatum.
Tax. sr. synonym of Andalusiella mauthei Riegel, 1974, according to Lentin and Williams, 1976. Lentin and Williams, 1977b retained Andalusiella mauthei as a separate species.
Holotype: Malloy, 1972, pl.1, fig.15
Locus typicus: Gabon GLA IX well, Gabon Republic, West Africa
Stratum typicum: Maastrichtian
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Original description as Svalbardella polymorpha: [Malloy, 1972, p. 63]:
Diagnosis:
Cyst fusiform, with a thin-walled outer cyst and an inner thicker-walled cyst, periphragm closely appressed to endophragm. The outer cyst displays a single apical horn and two distinct antapical horns. Both lengths and placement of the antapical horns are variable, with separation of the two sometimes equal to their lengths but often only minor. Antapical horns are usually unequal in length, with the shorter 1/2 to 1/3 the length of its neighbor. The short antapical horn, in some cases, may arise from the periphragm (or cyst margin in equatorial view) well away from and above the basal (proximal) contact of the longer antapical. Tips of both apical and antapical horns are either acute or blunted. As described for S . australina (revised), the apical and antapical portions are complex in structure (Text-fig. 2).
The archeopyle is hexagonal, intercalary, and identical to that of S. australina in relative size and outline. All but one specimen examined showed no indications of tabulation. This individual exhibited a pattern of folding involving both periphragm and endophragm, apparently related to tabulation but poorly preserved. No clear indications of a girdle or sulcus are present; however transverse median folding suggests the location of an equatorial structure.
Dimensions:
length 90 µm; width 38 µm to 77 µm.