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Boreocysta butticula
From Fensome et al., 2019:
Boreocysta butticula (Wiggins, 1969, p.150, pl.2, figs.1–5) Stover and Evitt, 1978, p.23. Holotype: Wiggins, 1969, pl.2,
figs.1–2; Fensome et al., 1993a, figs.1–2 — p.1005. Originally Omatia, subsequently (and now) Boreocysta. Age:
Neocomian, ?late Valanginian or early Hauterivian.
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Original description as Omatia butticula: [Wiggins, 1969, p. 150]:
Diagnosis:
The cyst is fusiform in outline, with a slight necklike constriction at the apical pole. The wall surface is smooth except for a varied number of processes in the median region and a concentrated number of the processes at the apical and antapical poles. These appendages are connected, at least in part, to a bottle-shaped outer membrane. The distance from the shell to the outer membrane may possibly be determined by the appendage length, and this dimension is rather uniform throughout.
Dimensions:
Holotype: overall length 118 µm, overall width 48 µm, shell length excluding operculum 60 µm.
Range of 30 specimens: [shell] length 60-80 µm, [shell] width 28-36 µm.
Wiggins noted that the overall length and width are too variable for consistent measurement since "... the outer membrane is commonly deflated".
Boreocysta butticula (Wiggins, 1969, p.150, pl.2, figs.1–5) Stover and Evitt, 1978, p.23. Holotype: Wiggins, 1969, pl.2,
figs.1–2; Fensome et al., 1993a, figs.1–2 — p.1005. Originally Omatia, subsequently (and now) Boreocysta. Age:
Neocomian, ?late Valanginian or early Hauterivian.
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Original description as Omatia butticula: [Wiggins, 1969, p. 150]:
Diagnosis:
The cyst is fusiform in outline, with a slight necklike constriction at the apical pole. The wall surface is smooth except for a varied number of processes in the median region and a concentrated number of the processes at the apical and antapical poles. These appendages are connected, at least in part, to a bottle-shaped outer membrane. The distance from the shell to the outer membrane may possibly be determined by the appendage length, and this dimension is rather uniform throughout.
Dimensions:
Holotype: overall length 118 µm, overall width 48 µm, shell length excluding operculum 60 µm.
Range of 30 specimens: [shell] length 60-80 µm, [shell] width 28-36 µm.
Wiggins noted that the overall length and width are too variable for consistent measurement since "... the outer membrane is commonly deflated".