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Fistulacysta simplex
Fistulacysta simplex Davey, 1988
Holotype: Davey, 1988, pl.8, fig.3
Locus typicus: Papuan Basin, Papua New Guinea
Stratum typicum: Late Oxfordian-Early Kimmeridgian
Original diagnosis: Davey, 1988, p. 37
As for the genus, with the addition that the crests are basically entire distally.
Dimensions: Range: Body length (archaeopyle developed) 58-86 Ám, body width (excluding crests) 36-37 Ám, height of crests up to 7.5 Ám.
Original description: Davey, 1988, p. 37
The pre- and postcingular crests are best seen at the lateral margins of the cyst and do not appear to be so well developed within the cyst margins. This could be simply that they are more difficult to observe here or that they are here significantly reduced on the dorsal and ventral surfaces. However, because of the lack of orientation features the latter possibility cannot be proved. The lateral, postcingular crests tend to extend continuously around the antapex of the cyst (pl.8, figs. 1-3), presumably along the dorsal margin of the antapical plate.
Holotype: Davey, 1988, pl.8, fig.3
Locus typicus: Papuan Basin, Papua New Guinea
Stratum typicum: Late Oxfordian-Early Kimmeridgian
Original diagnosis: Davey, 1988, p. 37
As for the genus, with the addition that the crests are basically entire distally.
Dimensions: Range: Body length (archaeopyle developed) 58-86 Ám, body width (excluding crests) 36-37 Ám, height of crests up to 7.5 Ám.
Original description: Davey, 1988, p. 37
The pre- and postcingular crests are best seen at the lateral margins of the cyst and do not appear to be so well developed within the cyst margins. This could be simply that they are more difficult to observe here or that they are here significantly reduced on the dorsal and ventral surfaces. However, because of the lack of orientation features the latter possibility cannot be proved. The lateral, postcingular crests tend to extend continuously around the antapex of the cyst (pl.8, figs. 1-3), presumably along the dorsal margin of the antapical plate.