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Operculodinium pontis
Operculodinium pontis Zevenboom and Santarelli in Zevenboom, 1995, p.139, pl.6, figs.11–14.
Name not validly published: considered a manuscript name.
Questionable assignment: Zevenboom and Santarelli in Zevenboom (1995, p.139).
Taxonomic senior synonym: Operculodinium tegillatum; Louwye (1999, p.115) considered Operculodinium? pontis to be a taxonomic junior synonym of Operculodinium antwerpense, which is now considered a taxonomic junior synonym of Operculodinium tegillatum. N.I.A.
Holotype: Zevenboom, 1995, pl.6, figs.11–14.
Age: ?late Miocene–Pliocene.
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Original description (Zevenboom, 1995)
Operculodinium pontis Zevenboom and Santarelli sp.nov. (manuscript name) (Plate VII, 1-3, 4-7).
Manuscript holotype: Sample Box 4/3, EF (P 33/3), Plate VI, 11-14
Etymology: In references to the similarity of the connections between the processes with the shape of the Golden Gate Bridge of San Francisco
Type locality: Boxmeer Well, The Netherlands
Type stratum: Kiezeloöliet Formation
Diagnosis: A species tentatively assigned to Operculodinium characterized by its two types of processes, large and small. The larger processes are connected by thin trabeculae, which seem to be supported by the numerous smaller processes. The larger processes are fibrous.
Dimensions: Height 32 (35) 37 µm; Width 32 (34) 37 µm (excluding processes), Processes: 5-6 (6-7) 7-8 µm; Wall thickness: 1-2 µm. N = 15.
Description: Sperical skolochorate cyst tentatively assigned to Operculodinium. The periphragm is microgranulate, the endophargm is smooth. Two types of processes are present; the larger processes are fibrous and bifurcate, whereas the smaller ones are hollow and capitate and more numerous. The larger processes are regularly distributed over the cyst body, show no apparent paratabulation and are interconnected by thin trabeculae. The trabeculae are connected at approx.. one third from the top of the larger processes. The archeopyle is formed by the loss of paraplate 3’’. The operculum is free.
Remark: Operculodinium? pontis is tentatively assigned to Operculodinium in view of the typically interconnected processes, a feature alien to the definition of Operculodinium.
Occurrences: The Netherlands (this study)
Total stratigraphic range: ?Upper Miocene through Pliocene (this study), see Fig. 5
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Name not validly published: considered a manuscript name.
Questionable assignment: Zevenboom and Santarelli in Zevenboom (1995, p.139).
Taxonomic senior synonym: Operculodinium tegillatum; Louwye (1999, p.115) considered Operculodinium? pontis to be a taxonomic junior synonym of Operculodinium antwerpense, which is now considered a taxonomic junior synonym of Operculodinium tegillatum. N.I.A.
Holotype: Zevenboom, 1995, pl.6, figs.11–14.
Age: ?late Miocene–Pliocene.
----------------------------------
Original description (Zevenboom, 1995)
Operculodinium pontis Zevenboom and Santarelli sp.nov. (manuscript name) (Plate VII, 1-3, 4-7).
Manuscript holotype: Sample Box 4/3, EF (P 33/3), Plate VI, 11-14
Etymology: In references to the similarity of the connections between the processes with the shape of the Golden Gate Bridge of San Francisco
Type locality: Boxmeer Well, The Netherlands
Type stratum: Kiezeloöliet Formation
Diagnosis: A species tentatively assigned to Operculodinium characterized by its two types of processes, large and small. The larger processes are connected by thin trabeculae, which seem to be supported by the numerous smaller processes. The larger processes are fibrous.
Dimensions: Height 32 (35) 37 µm; Width 32 (34) 37 µm (excluding processes), Processes: 5-6 (6-7) 7-8 µm; Wall thickness: 1-2 µm. N = 15.
Description: Sperical skolochorate cyst tentatively assigned to Operculodinium. The periphragm is microgranulate, the endophargm is smooth. Two types of processes are present; the larger processes are fibrous and bifurcate, whereas the smaller ones are hollow and capitate and more numerous. The larger processes are regularly distributed over the cyst body, show no apparent paratabulation and are interconnected by thin trabeculae. The trabeculae are connected at approx.. one third from the top of the larger processes. The archeopyle is formed by the loss of paraplate 3’’. The operculum is free.
Remark: Operculodinium? pontis is tentatively assigned to Operculodinium in view of the typically interconnected processes, a feature alien to the definition of Operculodinium.
Occurrences: The Netherlands (this study)
Total stratigraphic range: ?Upper Miocene through Pliocene (this study), see Fig. 5
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