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Rhynchodiniopsis giuseppei ssp. major
Rhynchodiniopsis giuseppei "subsp. major" (Morgenroth, 1966a, p.6, pl.2, figs.5–6) Sarjeant, 1982b, p.36.
Holotype: Morgenroth, 1966a, pl.2, figs.5–6. Originally Gonyaulax giuseppei subsp. major (Appendix B), subsequently Gonyaulacysta giuseppei subsp. major, thirdly Millioudodinium? giuseppei subsp. major, fourthly Rhynchodiniopsis? giuseppei subsp. major, fifthly Cribroperidinium giuseppei subsp. majus. Taxonomic senior synonym: Rhynchodiniopsis (as Cribroperidinium) giuseppei subsp. giuseppei, according to Helenes (1984, p.121) and Lentin and Williams (1989, p.81). Age: early Eocene.
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Original description: [Morgenroth, 1966a] (translated from German):
Gonyaulax giuseppei major n. subsp.
Pl. 2 Fig. 5, 6
Derivation: major lat.: the grebe.
Holotype: The specimen preserved in specimen H 349/26 and illustrated on Pl. 2 Fig. 5, 6.
Paratypoids: In specimen no. H 67, H 69, H 106.
Locus typicus: Fehmarn, Katharinenhof.
Stratum typicum: Lower Eocene (72).
Diagnosis: The new subspecies of the species Gonyaulux giuseppei has the following tabulation scheme: 4', 6", 6"', 11', 11', 1', 1"". The thin-walled, slightly oval shell has the same paneling as Gonyaulax giuseppei n. sp., with the epitheca and hypotheca being approximately the same size. The distinct apical horn is simply pointed and often broadens towards 3" at the base. - The plates are weakly granulated
and separated from each other by slightly raised, more heavily granulated sutures. Two concentrically arranged, more heavily granulated stripes running parallel to the plate outline can often be observed on the plates. - As in Gonyaulax giuseppei, the spiral girdle band is not depressed and is offset at its ends by approximately two girdle widths. The longitudinal groove, which runs from the first apical plate to the antapex, is distinctly depressed. On the hypotheca, as in Gonyaulax giuseppei n. sp., there are again two lateral constrictions of the girdle line. Likewise, the pyloma is formed by splitting off the 3" plate.
Comparison: The new subspecies is distinguished from Gonyaulax giuseppei n. sp. for the following reasons:
1. The two maximum dimensions differ by a) 25 μm in length,
b) 20 μm in width.
2. The development of the apical process is clearly different, as evident from the descriptions of both.
Dimensions: Length 80 μm (67 μm/87 μm), width 70 μm (67 μm/78 μm), length of the apical horn 6 μm-8 μm, pylome Ø 33 μm x 39 μm (50 measurements). Number of specimens examined: 73.
Holotype: Morgenroth, 1966a, pl.2, figs.5–6. Originally Gonyaulax giuseppei subsp. major (Appendix B), subsequently Gonyaulacysta giuseppei subsp. major, thirdly Millioudodinium? giuseppei subsp. major, fourthly Rhynchodiniopsis? giuseppei subsp. major, fifthly Cribroperidinium giuseppei subsp. majus. Taxonomic senior synonym: Rhynchodiniopsis (as Cribroperidinium) giuseppei subsp. giuseppei, according to Helenes (1984, p.121) and Lentin and Williams (1989, p.81). Age: early Eocene.
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Original description: [Morgenroth, 1966a] (translated from German):
Gonyaulax giuseppei major n. subsp.
Pl. 2 Fig. 5, 6
Derivation: major lat.: the grebe.
Holotype: The specimen preserved in specimen H 349/26 and illustrated on Pl. 2 Fig. 5, 6.
Paratypoids: In specimen no. H 67, H 69, H 106.
Locus typicus: Fehmarn, Katharinenhof.
Stratum typicum: Lower Eocene (72).
Diagnosis: The new subspecies of the species Gonyaulux giuseppei has the following tabulation scheme: 4', 6", 6"', 11', 11', 1', 1"". The thin-walled, slightly oval shell has the same paneling as Gonyaulax giuseppei n. sp., with the epitheca and hypotheca being approximately the same size. The distinct apical horn is simply pointed and often broadens towards 3" at the base. - The plates are weakly granulated
and separated from each other by slightly raised, more heavily granulated sutures. Two concentrically arranged, more heavily granulated stripes running parallel to the plate outline can often be observed on the plates. - As in Gonyaulax giuseppei, the spiral girdle band is not depressed and is offset at its ends by approximately two girdle widths. The longitudinal groove, which runs from the first apical plate to the antapex, is distinctly depressed. On the hypotheca, as in Gonyaulax giuseppei n. sp., there are again two lateral constrictions of the girdle line. Likewise, the pyloma is formed by splitting off the 3" plate.
Comparison: The new subspecies is distinguished from Gonyaulax giuseppei n. sp. for the following reasons:
1. The two maximum dimensions differ by a) 25 μm in length,
b) 20 μm in width.
2. The development of the apical process is clearly different, as evident from the descriptions of both.
Dimensions: Length 80 μm (67 μm/87 μm), width 70 μm (67 μm/78 μm), length of the apical horn 6 μm-8 μm, pylome Ø 33 μm x 39 μm (50 measurements). Number of specimens examined: 73.