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Pervosphaeridium septatum
From Fensome et al., 2019:
Pervosphaeridium septatum Slimani, 1996, p.378–379, pl.2, figs.J–L; pl.4, figs.C–D ex Slimani, 2001b, p.8, pl.1, figs.3,6–9. Holotype: Slimani, 1996, pl.2, figs.J–L; Slimani, 2001b, pl.1, figs.7–9. This name was not validly published in Slimani (1996) since no English or Latin description or diagnosis was provided. Age: early–late Campanian.
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Occurrence: Hallembaye: ech. 1 (Campanien inf.); Turnhout: -987 a -933 m (Campanien inf. - sup.).
Original description (Slimani, 1996): Pervosphaeridium septatum sp. nov. (Pl. 2, Fig. J-L; Pl. 4, Fig. C,D) Translation PKB 2025:
Description:
Chorate, acavate cyst. The wall consists of an autophragm with a fibroreticular external surface. A preapical process slightly larger than the other processes is present in only a few specimens. The cyst lacks a distinct antapical process. The central body is spheroidal to subspheroidal and produces numerous non-tabular, irregular processes in the form of thin axes, often bifurcated distally, aligned and connected laterally by tall membranous septa that form polygonal fields 10 to 20 µm in diameter. The branches of the bifurcated processes are spread apart and curved with a truncated to very slightly capitate distal end. Paratabulation is indicated only by the archaeopyle, which is precingulate of type 2P (4 + 5). The operculum consists of two disjointed paraplates, free or collapsed within the cyst. An alignment of processes is sometimes observed on the dorsal side of the cyst at the level of the paracingulum.
Dimensions
Maximum diameter of the central body: holotype, 60 µm; other specimens, 54-64 µm.
Process length: holotype, 12-20 µm; other specimens, 12-22 µm.
Septa height: holotype, 8-18 µm; other specimens, 6-20 µm.
Number of specimens measured: 10.
Remarks. Pervosphaeridium septatum sp. nov. is characterized by its irregular processes, bifurcated distally and connected laterally by high septa, forming a very discontinuous reticulum. Pervosphaeridium monasteriense Yun (1981) has the same type of processes, but they are more numerous, regularly distributed over the entire surface of the cyst, thinner, not bifurcated distally and connected only proximally, without low ridges.
Pervosphaeridium septatum Slimani, 1996, p.378–379, pl.2, figs.J–L; pl.4, figs.C–D ex Slimani, 2001b, p.8, pl.1, figs.3,6–9. Holotype: Slimani, 1996, pl.2, figs.J–L; Slimani, 2001b, pl.1, figs.7–9. This name was not validly published in Slimani (1996) since no English or Latin description or diagnosis was provided. Age: early–late Campanian.
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Occurrence: Hallembaye: ech. 1 (Campanien inf.); Turnhout: -987 a -933 m (Campanien inf. - sup.).
Original description (Slimani, 1996): Pervosphaeridium septatum sp. nov. (Pl. 2, Fig. J-L; Pl. 4, Fig. C,D) Translation PKB 2025:
Description:
Chorate, acavate cyst. The wall consists of an autophragm with a fibroreticular external surface. A preapical process slightly larger than the other processes is present in only a few specimens. The cyst lacks a distinct antapical process. The central body is spheroidal to subspheroidal and produces numerous non-tabular, irregular processes in the form of thin axes, often bifurcated distally, aligned and connected laterally by tall membranous septa that form polygonal fields 10 to 20 µm in diameter. The branches of the bifurcated processes are spread apart and curved with a truncated to very slightly capitate distal end. Paratabulation is indicated only by the archaeopyle, which is precingulate of type 2P (4 + 5). The operculum consists of two disjointed paraplates, free or collapsed within the cyst. An alignment of processes is sometimes observed on the dorsal side of the cyst at the level of the paracingulum.
Dimensions
Maximum diameter of the central body: holotype, 60 µm; other specimens, 54-64 µm.
Process length: holotype, 12-20 µm; other specimens, 12-22 µm.
Septa height: holotype, 8-18 µm; other specimens, 6-20 µm.
Number of specimens measured: 10.
Remarks. Pervosphaeridium septatum sp. nov. is characterized by its irregular processes, bifurcated distally and connected laterally by high septa, forming a very discontinuous reticulum. Pervosphaeridium monasteriense Yun (1981) has the same type of processes, but they are more numerous, regularly distributed over the entire surface of the cyst, thinner, not bifurcated distally and connected only proximally, without low ridges.