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Farragodinium
From Fensome et al., 2019:
"Farragodinium", Stevens and Helby in Riding and Helby, 2001g, p.212.
Name not validly published: based on an unpublished manuscript, listed in synonymy.
Taxonomic senior synonym: Stanfordella, by implication in Riding and Helby (2001g, p.212).
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Original description: [Riding and Helby, 2001g, p. 212] (as Stanfordella):
Stanfordella Helenes & Lucas-Clarke 1997
Type species. Stanfordella granulosa Helenes & Lucas-Clarke 1997.
Stanfordella granulosa Helenes & Lucas-Clarke 1997 (Figs l 6A-P, 17 A-D)
1992 Gonyaulacysta sp. A; Snape, p. 273, fig. 7b.
1997 Stanfordella granulosa; Helenes & LucasClarke, p. 182, fig. 4, pl. 2, figs 1-8.
Previous Australian usage
Dampierodinium ovum Parker ( 1986, p. 120-121, fig. 5.56, pl. 26, figs 4, 5).
Farragodinium curiosum Stevens & Helby (manuscript name).
M.P. 175 - Helby.
M.P. 654 - Helby.
Dimensions (µm, n=27) incl. parasutural crests where appropriate: Min. (Mean) Max.
Length of cyst incl. apical horn: 46 (59) 77
Length of apical horn: 3 (5) 9
Equatorial width of cyst: 44 (55) 70
Maximum height of parasutural crests: 1 (2) 5
The measured specimens are from conventional core samples in Lambert-2 well at 3101.00m, Lorikeet-1 well at 1759.10m, Mutineer-1B well at 3132.25m, Wanaea-2 well at 3375.34m, 2880.50m and 2875.30m and sidewall core samples from Avocet-1 A well at 1771.50m, Scafell-1 well at
1421.00m and Zeewulf-1 well at 3085.00m.
Comments. Stanfordella is a distinctive gonyaulacacean genus with a characteristic paratabulation pattern. The ventral paratabulation style is S-type of Evitt ( 1985) and the fourth apical paraplate is significantly reduced in size (Helenes & Lucas-Clarke, 1997, fig. 4, pl. 2, fig. 8). This apical
configuration was previously illustrated by Evitt (1985, figs 5.12M and 5.160). Stanfordella granulosa is a distinctive monocornucavate species with distally smooth to denticulate parasutural crests and a relatively sparse nontabular granulate ornament. The Australian material does not exhibit suturocavation; there is no wall separation at the parasutural crests, which are formed of periphragm (Figs 16, 17). This species was recorded as Gonyaulax granulosa from the late Tithonian to the Valanginian (Early Cretaceous) of the Great Valley Sequence of McCarty Creek, California by Warren ( 1967). Stanfordella granulosa is illustrated here (Figs 16, 17) as this is the first record of this species in the Australian region and also because of its stratigraphical importance.
Stratigraphical distribution. In Australia, Stanfordella granulosa ranges from the Tithonian upper Dingodinium jurassicum Zone (5aii) to the
Berriasian upper Cassiculosphaeridia delicata Zone (4biia) (Foster, this volume; Helby & Partridge, in prep.).
"Farragodinium", Stevens and Helby in Riding and Helby, 2001g, p.212.
Name not validly published: based on an unpublished manuscript, listed in synonymy.
Taxonomic senior synonym: Stanfordella, by implication in Riding and Helby (2001g, p.212).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Riding and Helby, 2001g, p. 212] (as Stanfordella):
Stanfordella Helenes & Lucas-Clarke 1997
Type species. Stanfordella granulosa Helenes & Lucas-Clarke 1997.
Stanfordella granulosa Helenes & Lucas-Clarke 1997 (Figs l 6A-P, 17 A-D)
1992 Gonyaulacysta sp. A; Snape, p. 273, fig. 7b.
1997 Stanfordella granulosa; Helenes & LucasClarke, p. 182, fig. 4, pl. 2, figs 1-8.
Previous Australian usage
Dampierodinium ovum Parker ( 1986, p. 120-121, fig. 5.56, pl. 26, figs 4, 5).
Farragodinium curiosum Stevens & Helby (manuscript name).
M.P. 175 - Helby.
M.P. 654 - Helby.
Dimensions (µm, n=27) incl. parasutural crests where appropriate: Min. (Mean) Max.
Length of cyst incl. apical horn: 46 (59) 77
Length of apical horn: 3 (5) 9
Equatorial width of cyst: 44 (55) 70
Maximum height of parasutural crests: 1 (2) 5
The measured specimens are from conventional core samples in Lambert-2 well at 3101.00m, Lorikeet-1 well at 1759.10m, Mutineer-1B well at 3132.25m, Wanaea-2 well at 3375.34m, 2880.50m and 2875.30m and sidewall core samples from Avocet-1 A well at 1771.50m, Scafell-1 well at
1421.00m and Zeewulf-1 well at 3085.00m.
Comments. Stanfordella is a distinctive gonyaulacacean genus with a characteristic paratabulation pattern. The ventral paratabulation style is S-type of Evitt ( 1985) and the fourth apical paraplate is significantly reduced in size (Helenes & Lucas-Clarke, 1997, fig. 4, pl. 2, fig. 8). This apical
configuration was previously illustrated by Evitt (1985, figs 5.12M and 5.160). Stanfordella granulosa is a distinctive monocornucavate species with distally smooth to denticulate parasutural crests and a relatively sparse nontabular granulate ornament. The Australian material does not exhibit suturocavation; there is no wall separation at the parasutural crests, which are formed of periphragm (Figs 16, 17). This species was recorded as Gonyaulax granulosa from the late Tithonian to the Valanginian (Early Cretaceous) of the Great Valley Sequence of McCarty Creek, California by Warren ( 1967). Stanfordella granulosa is illustrated here (Figs 16, 17) as this is the first record of this species in the Australian region and also because of its stratigraphical importance.
Stratigraphical distribution. In Australia, Stanfordella granulosa ranges from the Tithonian upper Dingodinium jurassicum Zone (5aii) to the
Berriasian upper Cassiculosphaeridia delicata Zone (4biia) (Foster, this volume; Helby & Partridge, in prep.).