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Peridictyocysta bamburiensis
Peridictyocysta? bamburiensis Mungai in Jiang Quinghua et al., 1992
Mungai in Jiang Quinghua et al., 1992 questionably included this species in Peridictyocysta.
Holotype: Mungai in Jiang Quinghua et al., 1992, pl.3, fig. 4
Locus typicus: Mto Panga Quarry, Kenya
Stratum typicum: Thithonian
Original diagnosis: Mungai in Jiang et al., 1992, p. 90
Central body elongate proximochorate, with rounded poles. Phragma comprises autophragm only, with an overall ornament of irregular grana and acicles together with larger solid spines aligned in rows. These spines may be linked by septa or trabeculae. Tabulation is partly indicated by the alignment of spines and by parasutural splits; probably gonyaulacoid, but indeterminate. Archaeopyle type tAa.
Original description: Mungai in Jiang et al., 1992, p. 90
The central body is elongate in the ratio of about 2 to 1. The archaeopyle has usually separated. The cingulum is well marked, about 10µm wide and offset about one width at the sulcus. The accessory sutures at the archaeopyle indicate six precingular plates and a small number possibly five post-cingular plates are indicated. The longitudinal rows of longer processes, which are about 6 µm long, can be joined by thin trabeculae at their distal ends; they may also be linked by thin septa. Because of their delicate nature these processes are often broken and rows of coarser granules are left to mark the parasutures. The antapex is marked by a cluster of slightly longer spines. The paracingulum and parasulcus form shallow grooves. The archaeopyle is apical with an attached operculum frequently broken off. The margin is circular with a well developed parasulcal notch.
Mungai in Jiang Quinghua et al., 1992 questionably included this species in Peridictyocysta.
Holotype: Mungai in Jiang Quinghua et al., 1992, pl.3, fig. 4
Locus typicus: Mto Panga Quarry, Kenya
Stratum typicum: Thithonian
Original diagnosis: Mungai in Jiang et al., 1992, p. 90
Central body elongate proximochorate, with rounded poles. Phragma comprises autophragm only, with an overall ornament of irregular grana and acicles together with larger solid spines aligned in rows. These spines may be linked by septa or trabeculae. Tabulation is partly indicated by the alignment of spines and by parasutural splits; probably gonyaulacoid, but indeterminate. Archaeopyle type tAa.
Original description: Mungai in Jiang et al., 1992, p. 90
The central body is elongate in the ratio of about 2 to 1. The archaeopyle has usually separated. The cingulum is well marked, about 10µm wide and offset about one width at the sulcus. The accessory sutures at the archaeopyle indicate six precingular plates and a small number possibly five post-cingular plates are indicated. The longitudinal rows of longer processes, which are about 6 µm long, can be joined by thin trabeculae at their distal ends; they may also be linked by thin septa. Because of their delicate nature these processes are often broken and rows of coarser granules are left to mark the parasutures. The antapex is marked by a cluster of slightly longer spines. The paracingulum and parasulcus form shallow grooves. The archaeopyle is apical with an attached operculum frequently broken off. The margin is circular with a well developed parasulcal notch.